TWI410689B - Packaging method for laser module employing separated clip - Google Patents

Abstract

A packaging method for laser module employing separated clip comprises the steps of: welding a first clip on a position of a base; computing another position of the base in accordance with a pre-compensation formulation and welding a second clip thereon, wherein the position of the second clip is adjustable relative to the position of the first clip; a fiber extending through a fiber ferrule and aligned with a position having best coupling efficiency; and using a first welding process and a second welding process to fix the fiber ferrule to the first and second clips in accordance with the aligned position. According to the above mentioned packaging method, because the position of the second clip is evaluable and adjustable, it has simplified process, reduced cost and decreased weld-shift.

Description

Split optical fiber fastener structure laser module method

The invention relates to a method for fabricating a laser module for a fiber optic fastener, and more particularly to a method for constructing a laser module by using a separate fiber optic fastener.

Referring to FIG. 1 , it discloses a conventional fiber optic fastener assembly laser module method and structure, which comprises a fastener group 91 , a fiber optic metal cladding tube 92 , an optical fiber 93 , and a laser light source 94 . . The fastener group 91 is configured to hold the fiber-optic metal-clad tube 92. The two ends of the fiber-optic metal-clad tube 92 have a first end portion 921 and a second end portion 922 respectively. The first end portion 921 of the 92 is such that a portion of the bare fiber 93 of the optical fiber 93 penetrates into the first end portion 921 and protrudes from the second end portion 922, and is protruded by the laser light source 94. The bare fiber 93 of the second end portion 922 of the fiber-optic metal cladding tube 92 is used for measuring the laser coupling power. The fastener group 91 includes a first fastener 911, a second fastener 912, and a connecting piece 913. The first fastening component 911, the second fastening component 912, and the connecting piece 913 integrally form the fastener component group. 91. Therefore, the two fasteners 911 and 912 are separated by a fixed distance, and the fixed distance cannot be adjusted.

Referring to FIG. 2, the conventional fiber optic fastener assembly laser module comprises: the fastener assembly step S91, the fixed substrate step S92, the optical fiber cladding tube 92 alignment step S93, the first The fastener 911 and the fiber-optic metal-clad tube 92 are welded to step S94, the displacement adjusting step S95, the second fastener 912 and the fiber-optic metal-clad tube 92 are welded to step S96 and the post-weld compensation step S97.

Referring to FIG. 3a, in the fastener group 91 forming step S91, the connecting piece 913 is integrally formed with the first fastening member 911 and the second fastening member 912, wherein the first fastening member 911 and the A fixed distance is formed between the second fasteners 912.

Referring to FIG. 3b, in the fixing substrate step S92, the first fastening member 911, the second fastening member 912 and the connecting piece 913 of the fastener group 91 are soldered and fixed on a substrate 95 to be on the substrate. A substrate pad Pa1, Pa2, and Pa3 are formed on the 95. The fastener group 91 is soldered to the substrate 95 so that the first fastener 911 is close to the laser source 94.

Referring to FIG. 3c, in the alignment step S93 of the fiber-optic metal-clad tube 92, the laser source 94 is aligned and protruded from the bare fiber 93 at the second end of the fiber-optic metal-clad tube 92. Actuating the laser source 94 to generate a laser light, so that the laser light passes through the optical fiber 93, further measuring the coupling efficiency of the optical fiber 93, and maintaining the optical fiber cladding tube 92 in parallel with the laser light to adjust the The position of the fiber-optic metal cladding tube 92 (ie, the fiber-optic metal-clad tube 92 approaches or leaves the substrate 95 for relative position adjustment), and determines the relative relationship of the fiber-optic metal-clad tube 92 by the change of the coupling light efficiency. The position of the optimal light coupling efficiency of the laser source 94, wherein the position of the optimal coupling efficiency is consistent with the path Y of the laser light.

Referring to FIG. 3d, in the step S94 of soldering the first fastener 911 and the optical fiber cladding tube 92, according to the position of the optimal coupling efficiency of the optical fiber cladding tube 92 with respect to the laser light source 94. The first metal soldering tube 92 is soldered and fixed to the first fastening member 911 of the fastener group 91 to form the first solder joint P8. The first solder joint P8 is adjacent to the optical fiber metal cladding tube 92. The second end portion 921.

However, when the first fastener 911 is welded to the fiber-optic metal-clad tube 92, there is still the following disadvantage: since the first solder joint P8 is formed at a position earlier than the first of the fiber-optic metal-clad tubes 92 The end portion 921 is far away, so most of the fiber-optic metal-clad tube 92 is in a suspended state. During the formation of the first solder joint P8, the first solder joint P8 to the first end of the optical fiber metal-clad tube 92 The force arm formed between the portions 921 is too long, and the welding stress is continued at the first solder joint P8, so that the first end portion 921 of the fiber-optic metal-clad tube 92 is formed with the first solder joint P8 as a fulcrum. Pivoting, at the first end portion 921, a displacement A1 in a direction away from the substrate 95, that is, a central axis Z of the fiber-optic metal cladding tube 92 at the first end portion 921 relative to the laser light The path Y generates a displacement A1; at the same time, a central axis Z of the fiber-optic metal cladding tube 92 generates a displacement A2 at the second end portion 922 with respect to the traveling path Y of the laser light, thereby causing the protrusion to protrude from the optical fiber metal coating. The fiber 93 of the second end 922 of the tube 92 deviates from the optimal coupling position, so that the optimal coupling efficiency cannot be obtained. .

In view of this, as shown in FIG. 3e, the conventional fiber-optic fastener assembly laser module method needs to perform the displacement adjustment step S95 after the first solder joint forming step. In the displacement adjusting step S95, the first end portion 921 of the fiber-optic metal-clad tube 92 is sandwiched by a pneumatic clamp 8 and moved toward the substrate 95 for correction so that the fiber-optic metal-clad tube 92 returns to the position of the optimum coupling efficiency, that is, the central axis Z of the fiber-optic metal cladding tube 92 coincides with the traveling path Y of the laser light.

Referring to FIG. 3f, the first end portion 921 of the fiber-optic metal-clad tube 92 is pivoted again by a micro-displacement A3 toward the substrate 95 by the pneumatic clamp 8 to leave the optimal coupling. The position of the light efficiency, the adjustment of the micro-displacement A3 is used to pre-compensate for the displacement expected to occur during the S96 step.

Referring to FIG. 3g, in the step S96 of soldering the second fastener 912 and the fiber-optic metal-clad tube 92, the fiber-optic metal-clad tube 92 is opposed to the position after the micro-displacement A3 is pivoted. The second fastener 912 is welded and fixed to form the second solder joint P9. However, since the distance between the first fastening member 911 and the second fastening member 912 is much shorter than the length of the optical fiber metal cladding tube 92, usually less than half, the optical fiber metal cladding tube 92 is caused by the second The solder joint P9 is still mostly in a suspended state between the ends of the first end portion 921 of the fiber-optic metal-clad tube 92, although the pre-compensation has been performed by the adjustment of the micro-displacement A3 in the displacement adjusting step S95, The arm is too long between the second pad P9 and the end of the first end 921 of the fiber-optic metal-clad tube 92. Therefore, after the second pad P9 is formed, the fiber-optic metal-clad tube 92 is first. It is still possible for the end portion 921 to generate a displacement A4 away from the substrate 95 and not to return to the optimum coupling efficiency position. At this time, an additional displacement compensation mechanism is required to restore the optical fiber cladding tube 92 to the optimum. The position of the coupling efficiency.

Therefore, as shown in FIG. 3h, in the post-weld compensation step S97, for the displacement A4 caused by welding the second pad P9, the pneumatic clip 8 is again used to clamp the first of the fiber-optic metal-clad tube 92. The end portion 921 performs a post-weld compensation operation to restore the optimum coupling efficiency position.

However, in general, in the process of constructing the conventional laser module, since the first pad P8 and the second pad P9 are formed, the displacement adjustment step S95 and the post-weld compensation step S97 are required to be performed most. The adjustment of the position of the light coupling efficiency will cause complicated overall assembly steps.

Furthermore, the conventional fiber optic fastener assembly laser module method requires the displacement adjustment step S95. Therefore, the use of the pneumatic clamp 8 is unavoidable, and the overall assembly cost is relatively increased.

The main object of the present invention is to improve the above disadvantages, and to provide a method for fabricating a laser module with a separate optical fiber fastener for a more compact and convenient construction step.

Another object of the present invention is to provide a method for fabricating a laser module with a split optical fiber fastener to reduce the cost of construction.

In order to achieve the foregoing object, the technical means for the present invention comprises: a method for fabricating a laser module with a separate optical fiber fastener, comprising the following steps: a first fixing step, providing a first fastening component, The first fastener is soldered and fixed on a substrate to form a first solder joint of the substrate, and the first fastener is adjacent to a laser emitting unit; a pre-compensation displacement calculating step is calculated according to an adjustable separation pitch and a deviation displacement ratio As a result, a second solder joint of the substrate is determined on the substrate, wherein a distance formed between a second fastener and the first fastener is the adjustable separation pitch, and a center axis of a bare fiber is in the bare fiber a displacement of a light to be measured end offset from a laser light travel path is the offset displacement, wherein the offset displacement value is obtained by an offset displacement database; and a second fixing step provides the second fastener, Fixing the second fastener on the second solder joint of the substrate of the substrate; in a pair of steps, providing a fiber-optic metal-clad tube, protruding through a first end of the fiber-wrapped metal cladding tube bare a light entrance end of the fiber is located at an exit port of the laser light emitting unit, and the position of the light exit port is an optimal coupling light efficiency position; a first welding step, the first end of the fiber metal cladding tube The first fastener is welded to the first fastener to form a fastener; and a second welding step is performed to weld the second end of the optical fiber cladding tube to the second fastener. Forming a fastener second solder joint, wherein the adjustable second spacer is formed between the fastener and the first solder joint of the fastener.

The above and other objects, features, and advantages of the present invention will become more apparent from the description of the appended claims. The method for fabricating a laser module with a separate optical fiber fastener according to a preferred embodiment of the present invention includes at least a first fixing step S11, a pre-compensation displacement calculating step S12, a second fixing step S13, a pair of positioning steps S14, and a The first welding step S15 and a second welding step S16.

Referring to FIG. 5, it is disclosed that the laser module of the present invention is constructed by the above-mentioned steps. The first fastening step 11 and the second fastening component 12 are fixed to a substrate 13 by the first fixing step S11 and the second fixing step S13; the pre-compensation displacement calculating step S12 determines the first a fastener 11 separates the relative distance of the second fastener 12; by the alignment step S14, a pair of bare fibers 15 disposed through a fiber-optic metal cladding tube 14 are located at a laser emitting unit 16; The two ends of the fiber-optic metal-clad tube 14 are respectively welded to the first fastener 11 and the second fastener 12 by the first welding step S15 and the second welding step S16.

Referring to FIG. 6a, in the first fixing step S11, the first fastening component 11 is provided, and the first fastening component 11 is soldered to the substrate 13 to form a substrate first solder joint 131. And the first fastener 11 is adjacent to the laser emitting unit 16.

Referring to FIG. 6b, the pre-compensation displacement calculation step S12 of the present invention is pre-compensated by a pre-compensation displacement calculation method (the pre-compensation displacement calculation method is detailed later) to determine the second fastener. The separation distance L2 is adjustable relative to one of the first fasteners 11 to determine the position of the second fastener 12 fixed to the second solder joint 132 of the substrate of the substrate 13 by the pre-compensation displacement calculation result.

Referring to FIG. 6b again, in the pre-compensation displacement calculation step S12, it is assumed that a mapping point Q is formed on the substrate 13, and the mapping point Q is used as a reference for setting the position of the bare optical fiber 15 and the light entering end 151. Point, the set position reference point of the light entering end 151 has a vertical mapping relationship with the mapping point Q, and the distance between the mapping point Q and the first solder joint 131 of the substrate is defined as L1; The distance from the solder joint 131 to the second solder joint 132 of the substrate is defined as the adjustable separation pitch L2; and it is assumed that the position of the light exit port 161 of the laser emitting unit 16 is an optimal coupling light efficiency position, and a laser light is self-aligned. The light exit port 161 is emitted and passes through a central axis W of the bare fiber 15 along a travel path X. Here, the central axis W of the bare fiber 15 is defined to be offset from the laser light travel path X by a displacement at the light entrance end 151. D1; and assuming that the central axis W of the bare fiber 15 is offset from the laser light travel path X by a displacement D2 at one of the bare optical fibers 152, the offset displacements D1, D2 can be expressed by:

The above formula can be rewritten as

Wherein, the deviation displacement D2 is a known number, and different materials of the optical fiber metal cladding tube 14 are selected to have different deviation displacements D2 due to different stress reaction conditions, and the present invention is different for various experiments by prior experiments. The material of the fiber-optic metal-clad tube 14 is pre-measured and recorded by the deviation displacement D2 value, thereby establishing an offset displacement database, so that the adjustable separation pitch L2 can be obtained by the above formula. It can be seen from the formula (2) that the fiber-optic metal-clad tube 14 having a small offset displacement D2 is selected, and when L2 is larger, D1 is relatively smaller; that is, if the first fastener 11 is extended relative to the second The adjustable separation distance L2 of the fastener 12 is such that the bare fiber 15 located at the first end 141 of the fiber cladding tube 14 is more accurately positioned at the optimum coupling efficiency position to make the displacement D1 can be relatively shortened, even eliminating post-weld displacement, to increase the coupling efficiency of the bare fiber 15.

The deviation displacement database of the preferred embodiment of the present invention is as shown in Table 1. The material A~D of the optical fiber metal cladding tube 14 is different (material A is Invar; material B is Kovar; material C is stainless steel 2208; material) D is a steel material SS304L) pre-experiment is performed in the first welding step S15, wherein the distance L1 is 4.9 mm, and the deviation of the materials A to D of the optical fiber metal-clad tube 14 is measured by the displacement D1 and D2. .

Referring to FIG. 6c, in the second fixing step S13, the result calculated in step S12 is calculated according to the pre-compensation displacement, so that the position of the second fastener 12 is separated from the position of the first fastener 11 The separation distance L2 can be adjusted and soldered to the second solder joint 132 of the substrate of the substrate 13.

Referring to FIG. 6d, in the alignment step S14, the coupling efficiency of the bare optical fiber 15 passing through the optical fiber cladding tube 14 is mainly determined by measuring the coupling efficiency. For the biggest.

Further, in the aligning step S14, the light entering end 151 of the bare fiber 15 is located at the light exit 161 of the laser light emitting unit 16, and the central axis W of the bare fiber 15 and the laser light are The traveling path X is aligned to be aligned, so that the laser light emitted by the laser emitting unit 16 can completely pass through the bare optical fiber 15, and the optical coupling metal package can be determined by measuring the optimal coupling efficiency of the bare optical fiber 15. The optimal coupling efficiency of the cover tube 14 relative to the laser emitting unit 16; wherein the second end portion 142 of the fiber-optic metal cladding tube 14 is preferably located adjacent to the second solder joint 132 of the substrate, such that the second The distance between the fastener 12 and the second end portion 142 of the fiber-optic metal cladding tube 14 is shortened, that is, the second fastening member 12 to the second end portion 142 of the fiber-optic metal cladding tube 14 forms a short arm. .

Referring to FIG. 6e, in the first welding S15 step, the first fastening member 11 is fixed to a position close to the first end portion 141 of the optical fiber metal cladding tube 14 and soldered to The first fastening member 11 and the first end portion 141 of the optical fiber metal cladding tube 14 form a fastener first solder joint 111. The position of the first solder joint 111 of the fastener is preferably perpendicular to the first solder joint 131 of the substrate. When the vertical mapping of the substrate is perpendicular to the substrate 12, a virtual vertical extension line passes through the first solder joint 111 of the fastener.

Referring to FIG. 6f, in the second welding step S16, the second fastening member 12 is fixed to the second end portion 142 of the optical fiber metal cladding tube 14 and soldered to The second fastening member 12 and the second end portion 142 of the optical fiber metal cladding tube 14 form a fastener second solder joint 121. The position of the second solder joint 121 of the fastener is preferably perpendicular to the second solder joint 132 of the substrate; wherein the vertical distance between the first solder joint 111 of the fastener and the first solder joint 131 of the substrate is equal to the fastener The vertical distance between the second solder joint 121 and the second solder joint 132 of the substrate, and the distance between the second solder joint 121 of the fastener and the first solder joint 111 of the fastener has the adjustable separation distance L2.

Since the distance between the second solder joint 121 of the fastener and the second end portion 142 of the optical fiber cladding tube 14 is shortened, the second solder joint 121 of the fastener is opposite to the first end of the optical fiber cladding tube 14 The portion 142 will form a longer force arm, so that the displacement generated at the second solder joint 121 of the fastener will offset the displacement generated by the first solder joint 111 of the fastener, even after the soldering due to complete cancellation. Displacement.

In the present case, the separation fastener optical fiber measuring module is assembled by the above steps, and the displacement adjustment step S95 and the post-welding compensation step S97 can be eliminated by using the electric clamp 8 compared with the conventional technology, and the case can be calculated by pre-calculation. The fixed position of the first solder joint 111 of the fastener and the second solder joint 121 of the fastener is determined, and no excessive displacement or even displacement is generated after the welding.

According to the foregoing steps, the method for fabricating the laser module by the separate optical fiber fastener according to the preferred embodiment of the present invention includes at least:

1. Simplifying the optical fiber fastener assembly step: the present invention simplifies the displacement adjustment step S95 and the post-weld compensation step S97 with respect to the conventional optical fiber measurement module assembly method. Therefore, the overall assembly step of the present invention is relatively Streamlined, so it really simplifies the fixed position step procedure.

2. Reduction in construction cost: Since the present invention can simplify the above steps with respect to the conventional fiber optic fastener assembly laser module, the present invention will not require the use of the electric clamp 8 to the optical fiber metal cladding tube 14 As a displacement compensation operation, the cost of construction can be reduced.

As described above, the method of assembling the laser module for the split type optical fiber fastener of the present invention has the effects of simplifying the construction steps and reducing the cost of the assembly.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

[this invention]

11. . . First fastener

111. . . Fastener first joint

12. . . Second fastener

121. . . Fastener second solder joint

13. . . Substrate

131. . . First solder joint of substrate

132. . . Second solder joint of substrate

14. . . Fiber optic metal coated tube

141. . . First end

142. . . Second end

15. . . Bare fiber

151. . . Light entry

152. . . Optical end to be tested

16. . . Laser emitting unit

161. . . Light exit

[知知]

8. . . Pneumatic clamp

91. . . Fastener group

911. . . First fastener

912. . . Second fastener

913. . . Connecting piece

92. . . Fiber optic metal coated tube

921. . . First end

922. . . Second end

93. . . optical fiber

94. . . Laser source

95. . . Substrate

Figure 1: The construction of a conventional fiber optic fastener assembly laser module.

Figure 2: Schematic diagram of the process flow of the conventional fiber-optic fastener assembly laser module.

Fig. 3a is a schematic view showing the assembly steps of the fastener group by the conventional method of fabricating the laser module.

Figure 3b: Schematic diagram of the conventional method of mounting a laser module to implement a fixed substrate.

Figure 3c: A schematic diagram of a conventional fiber optic fastener-mounted laser module method for performing a fiber-optic metal-clad tube alignment step.

Fig. 3d is a schematic view showing the welding step of the first fastener and the optical fiber cladding tube by the conventional method of fabricating the laser module.

Figure 3e: Schematic diagram of a conventional method for performing a displacement adjustment by mounting a laser module on a fiber optic fastener.

Figure 3f: Schematic diagram of the conventional method of fabricating a laser module to perform a micro-displacement when performing a displacement adjustment step.

FIG. 3g is a schematic diagram of a conventional method of fabricating a laser module to mount a second fastener and a metal cladding tube.

Figure 3h: Schematic diagram of the conventional method of fabricating a laser module to perform post-weld compensation.

4 is a block diagram showing the steps of a method for fabricating a laser module in a split optical fiber fastener according to a preferred embodiment of the present invention.

Figure 5 is a perspective view of a preferred embodiment of the present invention.

Figure 6a is a schematic view showing the method of performing the first fixing step of the method of fabricating a laser module in a separate optical fiber fastener according to a preferred embodiment of the present invention.

Figure 6b is a schematic diagram of a method for performing a pre-compensation displacement calculation by a method of fabricating a laser module with a split optical fiber fastener according to a preferred embodiment of the present invention.

Figure 6c is a schematic view showing the method of performing the second fixing step of the method of assembling the laser module by the split type optical fiber fastener according to the preferred embodiment of the present invention.

Fig. 6d is a schematic view showing the method of performing the alignment step by the method of assembling the laser module by the separate optical fiber fastener according to the preferred embodiment of the present invention.

Figure 6e is a schematic view showing the method of performing the first soldering step of the method of fabricating a laser module in a separate optical fiber fastener according to a preferred embodiment of the present invention.

Figure 6f is a schematic view showing the method of performing the second soldering step of the method of fabricating a laser module in a separate optical fiber fastener according to a preferred embodiment of the present invention.

Claims (7)

A method for fabricating a laser module with a separate optical fiber fastener comprises the following steps: a first fixing step, providing a first fastening component, and welding the first fastening component to a substrate to form a first solder joint of the substrate And the first fastener is adjacent to a laser emitting unit; a pre-compensation displacement calculating step determines a second solder joint of the substrate on the substrate according to an adjustable separation pitch and a deviation displacement ratio calculation result, wherein the first solder joint The distance formed by the second fastener relative to the first fastener is the adjustable separation pitch, and the displacement of the central axis of a bare fiber at a light-to-measure end of the bare fiber relative to a laser light travel path is The offset displacement, wherein the value of the offset displacement is obtained by an offset displacement database; a second fixing step provides the second fastener, and the second fastener is fixed on the second solder joint of the substrate of the substrate a pair of steps, providing a fiber-optic metal-clad tube, one of the bare fibers of the bare fiber extending from the first end of the fiber-optic metal-clad tube is disposed at one of the laser light-emitting units Mouth, the The position of the optical port is an optimal coupling efficiency position; in a first welding step, the first end of the fiber-optic metal-clad tube is welded to the first fastener to form a fastener first joint And a second soldering step of soldering the second end of the fiber-optic metal-clad tube to the second fastener to form a second solder joint of the fastener, wherein the second solder joint of the fastener The adjustable separation spacing is formed between the first welds of the fastener. The method for fabricating a laser module according to the first aspect of the invention, wherein in the pre-compensation displacement calculation step, a mapping point is set on the substrate, and the mapping point is from the mapping point to the substrate The ratio of the distance of a solder joint divided by the distance from the first solder joint of the substrate to the second solder joint of the substrate is equal to the deviation of the central axis of the bare fiber from the path of the laser light at the light entrance end of the bare fiber The position is removed by a ratio of the central axis of the bare fiber to the displacement of the laser light traveling path at the optical end of the bare fiber. The method for constructing a laser module according to the split optical fiber fastener according to the first aspect of the patent application, wherein in the pre-compensation displacement calculation step, the deviation displacement database is established by a preliminary experiment, which records various differences. The material of the fiber-optic metal-clad tube is relatively different in value from the displacement. The method for fabricating a laser module according to the split optical fiber fastener according to claim 2, wherein the mapping point is used as a reference point for setting a position of the light entering end of the bare fiber, and the mapping point has a vertical Mapping relations. The method of fabricating a laser module according to the split optical fiber fastener of claim 2, wherein in the aligning step, a central axis of the bare fiber is consistent with the laser light travel path. The method of assembling a laser module according to the first aspect of the invention, wherein the adjustable separation pitch is formed between the first solder joint of the substrate and the second solder joint of the substrate. The method of assembling a laser module according to the first aspect of the invention, wherein the vertical distance between the first solder joint of the fastener and the first solder joint of the substrate is equal to the second solder joint of the fastener The vertical distance of the second solder joint of the substrate.