JP3028787B2 - Optical module assembling method, optical module and optical module assembling apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an optical module assembling method, an optical module and an optical module assembling apparatus.
In particular, the present invention relates to a technique that can be effectively used to facilitate optical axis adjustment between a ferrule fiber and an LD (semiconductor laser).

[0002]

2. Description of the Related Art A conventional technique is disclosed in Japanese Utility Model Laid-Open No. 5-187.
There is an optical module assembling apparatus disclosed in Japanese Patent Publication No. 85. FIG. 9 shows an example of a conventional optical module assembling apparatus.
This optical module assembling apparatus fixes the LD 901 and
XY stage 902 for moving in the Y direction, LD 901
Fiber 903 for receiving light emitted from
A fiber support 904 for supporting the ferrule fiber 903, a Z stage 905 for fixing the ferrule fiber 903 and moving the fiber support 903 in the Z direction, and a plurality of fiber supports 904 arranged at equal intervals around the fiber support 904 and moving the fiber support 904 toward the LD 901. And a pressing claw 906 for applying pressure.

In a conventional optical module assembling apparatus, an LD 9
The XY stage 902 and the Z stage 905 are moved while emitting light 01, and the optical axis is adjusted so that the intensity of the light received by the ferrule fiber 903 is maximized. Is pressed uniformly, and the fiber support 904 and the ferrule fiber 903 are welded and fixed by the YAG laser.

[0004] Next, the ferrule fiber 903 is detached from the Z stage 905, the optical axis is adjusted while pressing with the pressing claw 906, and the fiber support 904 is again pressed evenly and fixed by welding to assemble the product.

[0005]

In the conventional optical module assembling apparatus, after the fiber support and the ferrule fiber are welded and fixed, the fiber support is pressed with a pressing claw in order to bring the contact surface between the fiber support and the LD into close contact. The optical axis is adjusted as it is. If the optical axis is adjusted while applying pressure, the LD will not move smoothly due to the frictional force,
There has been a problem that the optical axis cannot be adjusted smoothly or in the worst case, the optical axis cannot be adjusted.

Therefore, according to the present invention, the optical axis of the optical module is reliably adjusted while the fiber support is being pressed.
Another object of the present invention is to provide a technique capable of reducing the time required for optical axis adjustment.

[0007]

In order to solve the above-mentioned problems, the present invention has a step of adjusting an optical axis while bringing a fiber support of a ferrule fiber into contact with an LD (semiconductor laser) in a pressurized state. The method for assembling an optical module includes a step of adjusting the optical axis while supplying air to the contact surface between the fiber support and the LD. Here, when supplying air to the contact surface between the fiber support and the LD, a method of controlling the air supply pressure such that the fiber support floats slightly from the LD or the contact resistance is reduced. Is very suitable. In this case, air can be supplied from one of the fiber support and the LD to the other.
Alternatively, an air supply port may be provided in one of the fiber support and the LD, and air may be supplied from one side to the other using the air supply port. The optical module according to the present invention includes a fiber support having a cylindrical portion for supporting a ferrule fiber and a flange portion serving as a contact surface with the LD.
One or more air supply ports for supplying air toward the contact surface with D were provided. In that case, a configuration in which a circumferential groove connected to the air supply port is provided on the contact surface of the flange portion with the LD may be adopted. Furthermore, the optical module according to the present invention employs a configuration including an LD provided with one or more air supply ports for supplying air toward a contact surface with a fiber support that supports a ferrule fiber. Can be. In that case, a configuration in which a circumferential groove connected to the air supply port is provided on the contact surface with the fiber support may be adopted. In the optical module assembling apparatus according to the present invention, L
D has an LD holder for fixing D, an XY stage for fixing the LD holder and moving in the XY direction, and one or more air supply ports for supplying air toward the contact surface with the LD on the flange surface. And a fiber support having a circumferential groove connected to the air supply port on a contact surface with the LD,
A ferrule fiber supported by the fiber support and receiving light emitted from the LD, a Z stage for fixing the ferrule fiber and moving in the Z direction, and a fiber support arranged radially and evenly around the fiber support And a pressure claw for pressing the fiber support in the direction of the LD. Further, in the optical module assembling apparatus according to the present invention, a ferrule fiber, a fiber support that supports the ferrule fiber, and an air supply that emits light toward the ferrule fiber and supplies air toward a contact surface with the fiber support An LD having one or a plurality of ports and having a circumferential groove connected to the air supply port on a contact surface with the fiber support;
An LD holder having an air supply port for fixing D and supplying air to the air supply port of the LD, an XY stage for fixing the LD holder and moving in the XY direction, and fixing a ferrule fiber and moving in the Z direction And a pressing claw radially arranged around the fiber support at equal intervals and pressing the fiber support in the direction of the LD.

According to the method of the present invention, when the optical axis is adjusted while the fiber support of the ferrule fiber is brought into contact with the LD in a pressurized state, the fiber support and the L are adjusted.
Since air is supplied to the contact surface with D, the contact resistance between the two can be reduced, and the optical axis adjustment work can be performed easily. That is, for example, after welding and fixing the ferrule fiber and the fiber support, L
When the XY stage is moved while emitting D, and the optical axis is adjusted while pressing the fiber support with a pressing claw so that the intensity of light received by the ferrule fiber is maximized, the contact surface between the LD and the fiber support By supplying air and forming a thin film by air, the LD can be moved smoothly, and the optical axis adjustment can be performed reliably and in a short time.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of an optical module assembling apparatus according to Embodiment 1 of the present invention, FIG. 2 is an exploded perspective view of a fiber support and a tip portion of a pressing claw shown in FIG. 1, and FIG.
D is a bottom view showing a contact surface with D, and FIG. 4 is a side view at the time of optical axis adjustment work by the optical module assembling apparatus.

(Embodiment 1) As shown in FIG. 1, an optical module assembling apparatus according to the present embodiment includes an LD holder 102 for fixing an LD 101 and an XY for fixing the LD holder 102 and moving the LD holder 102 in the XY directions. Stage 103 and LD
The air supply ports 104 for supplying air toward the contact surface with the air supply 101 are radially spaced at equal intervals by flange portions 106.
2 and the groove 105 connecting the air supply port 104 is L
Fiber support 106 on the contact surface with D101
LD1 supported by the fiber support 106
Ferrule fiber 1 for receiving light emitted from 01
07, a Z stage 108 for fixing the ferrule fiber 107 and moving it in the Z direction, and a fiber support 106
And an air supply port 109 for supplying air to the air supply port 104 of the fiber support 106 at a contact surface with the fiber support 106, and the fiber support 106 is applied in the direction of the LD 101. And a pressing claw 110 for pressing.

Here, the structures of the fiber support 106 and the pressing claw 110 will be described in detail with reference to FIGS. FIG. 2 is an exploded perspective view of the fiber support 106 and the distal end of the pressing claw 110, and FIG. 3 is a bottom view of the contact surface of the fiber support 106 with the LD 101.

The fiber support 106 has a cylindrical portion 1061 for holding the ferrule fiber 107 and a flange portion 1062. Then, the flange portion 1062
An air supply port 104 for supplying air toward the contact surface with the LD 101 at radially uniform intervals is provided in the portion (see FIG. 2). Three air supply ports 104 are provided at equal intervals and penetrate in the thickness direction of the flange portion 1062. Further, the LD of the flange portion 1062
The pressure of the air supplied from the air supply port 104 is applied to the contact surface with the fiber support 106 and the LD 10.
A groove 105 connecting the air supply ports 104 is provided so as to evenly cover the contact surface with the contact surface 1 (see FIG. 3).

On the other hand, as a means for actually supplying air to each of the air supply ports 104, an example in which the air is supplied through each of the pressure claws 110 is shown. That is, the air supply port 10 for supplying air to the air supply port 104 of the fiber support 106 is provided at the tip of each pressure claw 110.
9 are provided (FIG. 2). The air supply port 109 of the pressure claw is a so-called air discharge port, and passes through the inside of the pressure claw 110 to form the air supply port 1.
09 is discharged. Therefore, a hose from an air pump (not shown) is connected to the pressing claw 110. In addition, the air supply port 109 at the tip of the pressure claw 110
Is designed to be connected to the air supply port 104 of the fiber support 106 when the fiber support 106 is pressurized by the pressing claw 110.

In the optical module assembling apparatus according to the first embodiment, after adjusting the optical axis of the LD 101 and the ferrule fiber 107 by the XY stage 103 and the Z stage 108, the ferrule fiber 107 and the fiber support 106 are fixed by welding, and then XY. The optical axis is adjusted by moving the stage 103. At this time, the optical axis is adjusted by applying pressure while supplying air to the air supply port 104 of the fiber support 106 with the pressing claw 110. The air supplied to the contact surface with the LD 101 forms an air thin film 111, and the LD 10
The frictional resistance of the contact surface between the fiber support 1 and the fiber support 106 can be reduced. Accordingly, the LD 101 can be moved smoothly, and the optical axis adjustment can be reliably performed in a short time while being pressed by the pressing claw 110.

The welding of the LD 101 and the fiber support 106 after the optical axis adjustment is performed by stopping the supply of air to the fiber support 106 and bringing the LD 101 and the fiber support 106 into close contact with each other. To an appropriate thickness, the air thin film 11
It is possible to make it hardly affected by the deviation of the optical axis in the Z direction due to the fluctuation of the thickness of 1.

Further, by supplying air as described above, even if small dust or dust is present between the contact surfaces between the fiber support 106 and the LD 101, the dust is blown off to obtain a good welding form. There is also an advantage that can be made.

[0017]

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a perspective view showing an optical module assembling apparatus according to Embodiment 2 of the present invention. The optical module assembling apparatus shown in FIG. 5 includes a ferrule fiber 501, a fiber support 502 that supports the ferrule fiber 501, and a light source that projects light toward the ferrule fiber 501.
An LD 505 having air supply ports 503 for supplying air toward a contact surface with the fiber support 502 at radially uniform intervals, and a groove 504 connecting the air supply ports 503 on the contact surface with the fiber support 502, and the LD 505. An LD holder 507 fixed and having an air supply port 506 for supplying air to an air supply port 503 of the LD 505;
An XY stage 508 for fixing the D holder 507 and moving in the XY directions, and a ferrule fiber 501 for fixing the Z
A Z stage 509 for moving the fiber support 502 in the direction and a pressing claw 510 that is radially arranged around the fiber support 502 at an equal interval and presses the fiber support 502 in the direction of the LD 505.

Here, the structures of the LD 505 and the LD holder 507 will be described in detail with reference to FIGS. FIG. 6 is an exploded perspective view of the LD 505 and the LD holder 507, and FIG. 7 is a perspective view showing a contact surface of the LD 505 with the fiber support 502.

The LD 505 includes a fiber support 502
Fiber support 5 at radially uniform intervals on the contact surface with
An air supply port 503 for supplying air toward the contact surface with the fiber support 502 is provided (FIG. 6), and the pressure of the air supplied from the air supply port 503 is supplied to the LD 505 on the contact surface with the fiber support 502. Air supply port 5 so as to evenly cover the contact surface between
A groove 504 connecting the first and second channels 03 is provided (FIG. 7).

The air supply port 503 of the LD 505 includes a horizontal hole 5031 opened on the outer peripheral surface thereof and a vertical hole 5032 opened on the upper surface of the LD 505 (contact surface with the fiber support 502).

On the other hand, the LD holder 507 has an LD 505
Three air supply ports 506 for supplying air to the air supply port 503 are provided (FIG. 6). This LD
The air supply port 503 of the holder 507 is
7 is provided so as to penetrate the peripheral wall portion of LD5.
05 is connected to the horizontal hole 5031 in the air supply port 503. Note that the side hole 5 of the LD holder 507
031 is connected to an air supply pipe 5061 from an air pump (not shown).

In the optical module assembling apparatus according to the second embodiment, the LD 505 and the X
After optical axis adjustment by Y stage 508 and Z stage 509, ferrule fiber 501 and fiber support 5
02 is fixed by welding, and then the XY stage 508 is moved to adjust the optical axis. The pressurizing claw 510 supplies air from the air supply port 506 of the LD holder 507 to the air supply port 503 of the LD 505. In order to adjust the optical axis, the air supplied to the contact surface between the LD 505 and the fiber support 502 is used to adjust the optical thin film 511.
Is formed, and the frictional resistance of the contact surface between the LD 505 and the fiber support 502 can be reduced. Thus, the LD 505 can be moved smoothly, and the optical axis adjustment can be performed reliably in a short time while the pressure is applied by the pressing claw 510.

The welding of the LD 505 and the fiber support 502 after the optical axis adjustment is performed by stopping the supply of air to the LD 505 and bringing the LD 505 and the fiber support 502 into close contact with each other. By setting the thickness, the influence of the optical axis shift in the Z direction due to the variation of the thickness of the air thin film 508 can be almost eliminated.

Further, according to the present embodiment, the LD 50
Since the air supply port is provided in each of the LD 5 and the LD 507, the LD 505 can be easily removed from the LD 507 by using the force of air.

[0025]

As described above, according to the present invention, by supplying air to the contact surface between the fiber support and the LD, the optical axis of the optical module can be surely adjusted while the fiber support is pressed. In addition, the time required for optical axis adjustment can be reduced. The reason is that the air supplied to the contact surface between the LD and the fiber support forms a thin film of air between the LD and the fiber support, thereby reducing the frictional resistance of the contact surface between the LD and the fiber support. This is because the LD can be smoothly moved while the fiber support is being pressed.

After the ferrule fiber and the fiber support are fixed by welding, when the optical axis is adjusted so that the intensity of light received by the ferrule fiber is maximized, air is supplied to the air supply port of the fiber support with a pressure claw. Even when the optical axis is adjusted while supplying and applying pressure, a thin film is formed by the supplied air on the contact surface between the fiber support and the LD, and the LD can be moved smoothly. It can be performed reliably and in a short time. In that case, the supply of air can be performed more effectively by using the pressure claw.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an optical module assembling apparatus according to Embodiment 1 of the present invention.

FIG. 2 is an exploded perspective view of a fiber support and a distal end of a pressing claw of the optical module assembling apparatus according to the first embodiment.

FIG. 3 is a bottom view of a contact surface between the fiber support and the LD of the optical module assembling apparatus according to the first embodiment;

FIG. 4 is a side view of the optical module assembling apparatus according to the first embodiment when the optical axis is adjusted while applying pressure with a pressing claw.

FIG. 5 is a perspective view showing an optical module assembling apparatus according to Embodiment 2 of the present invention.

FIG. 6 is an exploded perspective view of an LD and an LD holder of the optical module assembling apparatus according to the second embodiment.

FIG. 7 is a perspective view of an LD of the optical module assembling apparatus according to the second embodiment.

FIG. 8 is a side view of the optical module assembling apparatus according to the second embodiment when the optical axis is adjusted while applying pressure with a pressing claw.

FIG. 9 is a perspective view showing an example of a conventional optical module assembling apparatus.

[Explanation of symbols]

 101, 501, 901 LD 102, 507 LD holder 103, 508, 902 XY stage 104, 109, 503, 506 Air supply port 105, 504 Groove 106, 502, 904 Fiber support 107, 501, 903 Ferrule fiber 108, 509, 905 Z stage 110, 510, 906 Pressing claw 111, 511 Air thin film 1061 Cylindrical part 1062 Flange part 5031 Horizontal groove 5032 Vertical groove 5061 Air supply pipe

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G02B 6/42 G02B 7/00 H01S 5/30

Claims (10)

(57) [Claims] 1. A method for assembling an optical module, comprising: adjusting an optical axis while bringing a fiber support of a ferrule fiber into contact with an LD (semiconductor laser) in a pressurized state. An optical module assembling method, comprising a step of adjusting an optical axis while supplying air. 2. When supplying air to a contact surface between the fiber support and the LD, the fiber support
Characterized in that the air supply pressure is controlled so as to be in a state in which the contact resistance is reduced or in a state in which the contact resistance is reduced,
An optical module assembling method according to claim 1. 3. The optical module assembling method according to claim 1, wherein air is supplied from one of the fiber support and the LD to the other. 4. An air supply port is provided in one of the fiber support and the LD, and air is supplied from one to the other using the air supply port. The optical module assembling method according to 1. 5. A fiber support having a cylindrical portion supporting a ferrule fiber and a flange portion serving as a contact surface with the LD, for supplying air to the flange portion toward a contact surface with the LD. 1 air supply port
An optical module, wherein one or more optical modules are provided. 6. The optical module according to claim 5, wherein a circumferential groove connected to the air supply port is provided on a contact surface of the flange portion with the LD. 7. An optical module, comprising: an LD provided with one or more air supply ports for supplying air toward a contact surface with a fiber support that supports a ferrule fiber. 8. The optical module according to claim 7, wherein a circumferential groove connected to the air supply port is provided on a contact surface with the fiber support. 9. An LD holder for fixing an LD, and the LD
An XY stage for fixing the holder and moving in the XY directions, and one or more air supply ports for supplying air toward the contact surface with the LD on the flange surface, and a circumferential shape connected to the air supply port A fiber support having a groove on the contact surface with the LD, a ferrule fiber supported by the fiber support and receiving light emitted from the LD, and a Z stage for fixing the ferrule fiber and moving the ferrule fiber in the Z direction. An air supply port that is radially arranged around the fiber support and that supplies air to the air supply port of the fiber support at a contact surface with the fiber support; and An optical module assembling apparatus comprising: a pressing claw for pressing in the direction of. 10. A ferrule fiber, a fiber support for supporting the ferrule fiber, and one or more air supply ports for projecting light toward the ferrule fiber and supplying air toward a contact surface with the fiber support. An LD having a plurality of grooves and a circumferential groove connected to the air supply port on the contact surface with the fiber support; and an air supply port for fixing the LD and supplying air to the air supply port of the LD. An LD holder having the same, an XY stage for fixing the LD holder and moving in the XY directions, and a Z for fixing the ferrule fiber.
A Z stage for moving the fiber support in a direction, and a pressing claw radially disposed around the fiber support at an equal interval and pressing the fiber support in the direction of the LD. Module assembly equipment.