JP2010014894A - Light emitting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light emitting apparatus in which an optical waveguide and a light emitting device are easily aligned. <P>SOLUTION: The light emitting apparatus 1 includes: a semiconductor optical amplifier 5 and optical fibers 6, 7. The semiconductor optical amplifier 5 has light incident/emitting faces 5a, 5b which face each other and light is made incident on and emitted from the faces. The optical fibers 6, 7 guide the light which is made incident on the semiconductor optical amplifier 5 and the light which is emitted from the semiconductor optical amplifier 5. The light which is emitted from the semiconductor optical amplifier 5 is laser-oscillated with a half-reflection member 52 and a total reflection member 57, and the optical fibers 6, 7 are aligned with the laser light. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a light emitting device including a light emitting element and an optical waveguide that guides light emitted from the light emitting element or light incident on the light emitting element.

  Conventionally, a light emitting device including a light emitting element such as a semiconductor optical amplifier and a light emitting diode and an optical waveguide such as an optical fiber is known. In such a light emitting device, the alignment between the light emitting element and the optical waveguide greatly affects the performance after completion. Therefore, various alignment methods are known.

For example, Patent Document 1 discloses a method for aligning a photodiode and an optical fiber. In the alignment method of Patent Document 1, the end face of the photodiode is pressed by the end face of the optical fiber so that the end faces are parallel to each other. Thereafter, the optical fiber is retracted from the photodiode by a certain distance while maintaining the parallel relationship of the end faces. Finally, the optical fiber is moved, and the optical axes are aligned with each other to complete the alignment.
JP-A-10-186181

  Here, when the alignment method as described in Patent Document 1 described above is applied to a device in which a photodiode is a light emitting element such as a semiconductor optical amplifier or a semiconductor light emitting diode, the optical axes of the light emitting elements coincide with each other. Alignment is performed as follows. However, since the light from these light emitting elements is weak, it is difficult to detect and alignment is difficult.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a light-emitting device that can easily align an optical waveguide and a light-emitting element.

  In order to achieve the above-mentioned object, the invention according to claim 1 includes a light emitting element having a first light entrance / exit surface on which light is incident or emitted, and capable of amplifying light, and light emitted from the light emitting element, or A first optical waveguide disposed at a position opposite to the first light entrance / exit surface for guiding light incident on the light emitting element, and lasing the light emitted from the light emitting element The light emitting device is characterized in that alignment of the light emitting element and the optical waveguide is performed by the laser beam.

  According to a second aspect of the present invention, there is provided the light emitting device according to claim 1, wherein the light emitting device is laser-oscillated by a first reflecting member and a second reflecting member which are disposed at positions facing each other with the light emitting device and the first optical waveguide interposed therebetween. The light emitting device according to claim 1, wherein the alignment of the first optical waveguide is performed.

  The invention according to claim 3 is the light emitting device according to claim 2, wherein the first reflecting member is capable of transmitting a part of light.

  According to a fourth aspect of the present invention, the laser beam is measured by a power meter that can measure the output of light and is disposed at a position opposite to the first optical waveguide with the first reflecting member interposed therebetween. However, the light emitting device according to claim 3, wherein the light emitting element and the first optical waveguide are aligned.

  According to a fifth aspect of the present invention, the light emitting element has a second light input / output surface facing the first light input / output surface, and one end is disposed at a position facing the second light input / output surface. The second optical waveguide is further provided, and laser oscillation is performed by the third reflecting member disposed at the other end of the second optical waveguide and the first reflecting member disposed at the other end of the first optical waveguide. 5. The light emitting device according to claim 3, wherein alignment of the light emitting element and the second optical waveguide is performed by the laser beam.

  According to a sixth aspect of the present invention, the light-emitting element has a second light input / output surface facing the first light input / output surface, and the other end of the first optical waveguide is connected to the second light input / output surface. The light emission is performed such that the laser light is detected by a power meter that is disposed at a position facing the exit surface and that can measure light that is emitted from the light emitting element and incident from both ends of the first optical waveguide and guided. The light-emitting device according to claim 1, wherein an element and the first optical waveguide are aligned.

  The invention according to claim 7 is the light emitting device according to any one of claims 1 to 6, characterized in that the optical waveguide is disposed at a position where the laser beam is maximized. .

  The invention according to claim 8 is characterized in that the optical waveguide is arranged at a position where the current threshold for laser oscillation is minimized. The light emitting device.

  According to the present invention, the alignment between the optical waveguide and the light emitting element is performed by the laser light obtained by lasing the light emitted from the light emitting element. Thereby, compared with the case where the light of the light emitting element which is not a laser beam is used as it is, a laser beam is strong and can detect light easily. As a result, alignment between the optical waveguide and the light emitting element can be easily performed.

(First embodiment)
Hereinafter, a light emitting device according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of the light emitting device according to the first embodiment. FIG. 2 is an internal side view of the light emitting device. FIG. 3 is a perspective view of the semiconductor optical amplifier. FIG. 4 is an enlarged view of the optical fiber and the fiber connector. The light emitting device according to the present invention can be used for relaying light.

  As shown in FIGS. 1 and 2, the light-emitting device 1 includes a Peltier element 2, a wiring board 3, a thermistor 4, a semiconductor optical amplifier (SOA) 5, optical fibers 6 and 7, and a fiber. Connectors 8 and 9 and a package 10 including a lid 10a are provided. The semiconductor optical amplifier 5 corresponds to the light emitting element described in the claims. The optical fiber 6 (7) corresponds to the first optical waveguide (second optical waveguide) described in the claims.

  The Peltier element 2 is for cooling the light emitting device 1. The Peltier element 2 is fixed to the bottom surface of the package 10.

  The wiring board 3 is for electrically connecting the Peltier element 2 and the semiconductor optical amplifier 5 to the outside, and for fixing the semiconductor optical amplifier 5 and the optical fibers 6 and 7. The wiring board 3 is fixed to the upper surface of the Peltier element 2.

  The thermistor 4 is for measuring the temperature in the light emitting device 1. The thermistor 4 is fixed to the wiring board 3.

  The semiconductor optical amplifier 5 is for amplifying and emitting light incident through the optical fibers 6 and 7. As shown in FIG. 3, the semiconductor optical amplifier 5 includes a substrate 11, a semiconductor stacked portion 12 formed on the substrate 11, a pair of electrodes 13 and 14, and antireflection films 15 and 16. The substrate 11 is made of conductive n-type GaAs. In the semiconductor stacked portion 12, an n-type semiconductor layer 21, an active layer 22, and a p-type semiconductor layer 23 are sequentially stacked from the substrate 11 side. Each of the semiconductor layers 21 to 23 is made of a GaAs semiconductor. The GaAs-based semiconductor here refers to a semiconductor containing not only GaAs but also GaAs such as InGaAs and AlGaAs. On the upper surface of the semiconductor stacked portion 12, a stripe portion 24 for confining current is formed.

  Out of the end faces of the semiconductor optical amplifier 5, the opposite end faces on the extension line of the stripe portion 24 are light entrance / exit faces 5a and 5b on which light is incident and emitted. The light entrance / exit surface 5a corresponds to the first light entrance / exit surface recited in the claims. The light entrance / exit surface 5b corresponds to a second light entrance / exit surface described in claims. The electrode 13 is formed on the back surface of the substrate 11. The electrode 13 is electrically connected to the submount 31. The electrode 14 is formed on the upper surface of the semiconductor stacked portion 12. The antireflection films 15 and 16 are provided on the light incident / exit surfaces 5 a and 5 b of the semiconductor optical amplifier 5. The antireflection films 15 and 16 are made of a dielectric film. The semiconductor optical amplifier 5 is fixed to the wiring board 3 via the submount 31.

  The optical fibers 6 and 7 are for guiding light incident on the semiconductor optical amplifier 5 and light emitted from the semiconductor optical amplifier 5 in the A direction and the B direction. The optical fibers 6 and 7 are aligned by a laser beam obtained by lasing the light emitted from the semiconductor optical amplifier 5. The optical fibers 6 and 7 have a length of about 1 m and a thickness of about 0.125 mm to about 0.900 mm. The surfaces of the optical fibers 6 and 7 are coated with a metal multilayer film containing Au as the outermost layer.

  One end 6 a of the optical fiber 6 is disposed at a position facing one light input / output surface 5 a of the semiconductor optical amplifier 5. One end 7 a of the optical fiber 7 is disposed at a position facing the other light input / output surface 5 b of the semiconductor optical amplifier 5. As shown in FIG. 4, the tips of the one end portions 6a and 7a of the optical fibers 6 and 7 are formed in a partial spherical shape so as to function as a lens. The optical fiber 6 (7) is fixed to the fiber fixing base 33 (35) by AuSn solder 32 (34). The fiber fixing bases 33 and 35 are fixed to the wiring base 3. The optical fibers 6 and 7 are also fixed by a sealing material 37 sealed in openings 10 b and 10 c formed on the side surface of the package 10.

  The fiber connector 8 (9) is for connecting the optical fiber 6 (7) to another optical fiber. As shown in FIG. 4, the fiber connector 8 (9) is provided at the other end 6b (7b) of the optical fiber 6 (7). The light input / output surface 8a (9a) of the fiber connector 8 (9) is inclined (for example, 8 °) with respect to the optical axis of the optical fiber 6 (7) by APC (Angled Physical Contact) polishing. Thereby, the light entrance / exit surface 8a (9a) reduces the loss due to the reflection of light.

  Next, the operation of the light emitting device 1 according to the first embodiment described above will be described.

  First, in the light emitting device 1, when a voltage is applied between the electrodes 13 and 14 of the semiconductor optical amplifier 5, an inversion distribution state is obtained. On the other hand, the light guided in the A direction through the optical fiber 6 is emitted from the end 6a and enters the semiconductor optical amplifier 5 from the light input / output surface 5a. Here, since the semiconductor optical amplifier 5 is in an inverted distribution state, stimulated emission occurs due to the incident light, and the light is amplified. The amplified light is emitted from the light incident / exit surface 5b and enters the optical fiber 7 from the end 7a. Then, the amplified light is guided through the optical fiber 7. In addition, about the light which guides the optical fiber 7 to a B direction, since the operation | movement is the same except that the light which guides the optical fiber 6 to an A direction is reverse, description is abbreviate | omitted.

  Next, the assembly process of the light emitting device 1 described above will be described. 5-10 is a figure for demonstrating the assembly process of the light-emitting device by 1st Embodiment.

  First, as shown in FIG. 5, the thermistor 4, the submount 31 on which the semiconductor optical amplifier 5 is mounted, and the fiber fixing bases 33 and 35 are fixed to the wiring base 3.

  Next, as shown in FIG. 6, the semi-reflective member (corresponding to the first reflective member in the claims) 52 is connected to the fiber connector 8 provided at the other end 6 b of the optical fiber 6 through the adapter 51. . The semi-reflective member 52 includes a fiber connector 53, an optical fiber 54, and a fiber connector 55. The light input / output surface 55 a of the fiber connector 55 is orthogonal to the optical axis of the optical fiber 54. Thereby, at the light entrance / exit surface 55a of the fiber connector 55, a part (for example, 10%) of light is reflected back and a part (for example, 90%) of light is transmitted. Here, the light input / output surface 55a of the fiber connector 55 may be coated with a dielectric multilayer film so that half light is reflected back and half light is transmitted.

  Next, a power meter 56 having a photodiode is disposed so as to face the light input / output surface 55 a of the fiber connector 55. That is, the power meter 56 is disposed on the opposite side of the optical fiber 6 with the semi-reflective member 52 interposed therebetween. The power meter 56 is for measuring the output of light emitted from the semiconductor optical amplifier 5 and guided through the optical fibers 6 and 54. Further, a total reflection member 57 (corresponding to a second reflection member in claims) 57 is installed on the fiber fixing base 35 so as to face the light input / output surface 5 b of the semiconductor optical amplifier 5. That is, the semi-reflective member 52 and the total reflective member 57 are disposed at positions facing each other with the semiconductor optical amplifier 5 and the optical fiber 6 interposed therebetween. The total reflection member 57 is for reflecting the light emitted from the light input / output surface 5 b of the semiconductor optical amplifier 5 back to the light input / output surface 5 b of the semiconductor optical amplifier 5. Thus, a resonator for causing laser oscillation is constituted by the semi-reflective member 52 and the total reflective member 57. The optical fiber 6 is held by an XYZ axis stage and a triaxial rotational direction goniometer stage (not shown).

  In the state shown in FIG. 6, a voltage is applied to the semiconductor optical amplifier 5. As a result, the semiconductor optical amplifier 5 is in an inverted distribution state, and light is emitted from the light incident / exit surfaces 5a and 5b. Here, when the optical axis of the optical fiber 6 and the optical axis of the semiconductor optical amplifier 5 are deviated, the light emitted from the light entrance / exit surface 5a does not enter the end portion 6a of the optical fiber 6 or hardly enters. do not do. In this case, the power meter 56 hardly detects light.

  On the other hand, when the optical axis of the optical fiber 6 and the optical axis of the semiconductor optical amplifier 5 are substantially coincident and light emitted from the light input / output surface 5a is incident on the end 6a of the optical fiber 6 to some extent, laser oscillation occurs. Specifically, when light incident from the end 6a of the optical fiber 6 is guided in the B direction through the optical fibers 6 and 54 and reaches the fiber connector 55, a part of the light is reflected by the light input / output surface 55a. Is done. The reflected light is guided in the A direction through the optical fibers 54 and 6 and then enters the semiconductor optical amplifier 5. Thereafter, the light is emitted from the light incident / exit surface 5 b of the semiconductor optical amplifier 5 and then reaches the total reflection member 57. The light that reaches the total reflection member 57 is reflected and returned to the semiconductor optical amplifier 5 and then emitted from the light incident / exit surface 5a. As described above, the light emitted from the semiconductor optical amplifier 5 is guided between the semi-reflective member 52 and the total reflective member 57, and thereby laser oscillation is performed. A part of the laser light guided by laser oscillation is transmitted through the light entrance / exit surface 55 a of the fiber connector 55 and received by the power meter 56. As a result, the output corresponding to the laser beam is measured by the power meter 56.

  Thereafter, the optical fiber 6 is further finely adjusted so that the output of the laser beam measured by the power meter 56 is maximized. Alternatively, the optical fiber 6 is finely adjusted so that the current threshold required for the laser light measured by the power meter 56 is minimized.

  Next, as shown in FIG. 7, the optical fiber 6 is fixed to the fiber fixing base 33 by AuSn solder 32. As a result, the optical fiber 6 is installed at a position and a direction where the coupling efficiency of light between the semiconductor optical amplifier 5 and the optical fiber 6 becomes the best. Thereafter, the XYZ axis stage and the triaxial rotational direction goniometer stage are removed. Thereby, the alignment of the optical fiber 6 is completed.

  Next, as shown in FIG. 8, a semi-reflective member (corresponding to a third reflective member in the claims) 62 is connected to a fiber connector 9 provided at the other end 7 b of the optical fiber 7 via an adapter 61. . The semi-reflective member 62 includes a fiber connector 63, an optical fiber 64, and a fiber connector 65. The light input / output surface 65 a of the fiber connector 65 is orthogonal to the optical axis of the optical fiber 64. Thereby, in the light entrance / exit surface 65a, a part (for example, 10%) of the light guided through the optical fiber 64 is reflected back and a part (for example, 90%) of the light is transmitted. The power meter 56 is disposed so as to face the light input / output surface 65a of the fiber connector 65. The optical fiber 7 is held by an XYZ axis stage and a triaxial rotational direction goniometer stage (not shown).

  In the state shown in FIG. 8, a voltage is applied to the semiconductor optical amplifier 5. As a result, the semiconductor optical amplifier 5 is in an inverted distribution state, and light is emitted from the light incident / exit surfaces 5a and 5b. Here, if the optical axis of the optical fiber 7 and the optical axis of the semiconductor optical amplifier 5 are deviated, the light emitted from the light entrance / exit surface 5b does not enter the end portion 7a of the optical fiber 7 or hardly enters. do not do. In this case, the power meter 56 hardly detects light.

  On the other hand, when the optical axis of the optical fiber 7 and the optical axis of the semiconductor optical amplifier 5 are substantially coincident and the light emitted from the light input / output surface 5b is incident to the end 7a of the optical fiber 7 to some extent, laser oscillation occurs. Specifically, when light incident from the end 7a of the optical fiber 7 is guided in the A direction through the optical fibers 7 and 64 and reaches the fiber connector 65, a part of the light is reflected by the light input / output surface 65a. Is done. The reflected light is guided in the B direction through the optical fibers 64 and 7 and then enters the semiconductor optical amplifier 5. Then, after the light is emitted from the light input / output surface 5 a of the semiconductor optical amplifier 5, the light is guided through the already aligned optical fibers 6 and 54, and then reaches the fiber connector 55. A part of the light reaching the light input / output surface 55a of the fiber connector 55 is reflected, returns to the semiconductor optical amplifier 5, and then emitted from the light input / output surface 5b. As described above, the light emitted from the semiconductor optical amplifier 5 is guided between the semi-reflective member 62 and the semi-reflective member 52 so that laser oscillation occurs. Part of the laser light that is laser-oscillated and guided passes through the light input / output surface 65 a of the fiber connector 65 and is received by the power meter 56. As a result, the output corresponding to the laser beam is measured by the power meter 56. Thereafter, fine adjustment of the optical fiber 7 is further performed so that the output of the laser beam measured by the power meter 56 is maximized. Alternatively, the optical fiber 7 is finely adjusted so that the threshold value of the current required for the laser light measured by the power meter 56 is minimized.

  Next, as shown in FIG. 9, the optical fiber 7 is fixed to the fiber fixing base 33 by AuSn solder 32. As a result, the optical fiber 7 is installed at a position and a direction where the coupling efficiency of light between the semiconductor optical amplifier 5 and the optical fiber 7 becomes the best. Thereby, the alignment of the optical fiber 7 is completed.

  Next, as shown in FIG. 10, the semi-reflective member 52, the power meter 56, the semi-reflective member 62, and the adapters 51 and 61 are removed.

  Thereafter, together with the Peltier element 2, the thermistor 4 and the like, the wiring board 3 on which the optical fibers 6 and 7 are installed is mounted on the package 10 to complete the light emitting device 1 shown in FIG.

  As described above, in the light emitting device 1 according to the first embodiment, the light emitted from the semiconductor optical amplifier 5 is laser-oscillated between the semi-reflective member 52 and the total reflective member 57 to obtain laser light. The optical fiber 6 is aligned using this laser light that can be easily detected by the power meter 56. As a result, alignment between the optical fiber 6 and the semiconductor optical amplifier 5 can be easily performed.

  Further, after the alignment of the optical fiber 6, the optical fiber 7 is aligned by attaching the semi-reflective member 62 to the other end 7 b side of the optical fiber 7 without removing the semi-reflective member 52. Thereby, alignment of the optical fiber 7 can be simplified.

(Second Embodiment)
Next, the light emitting device according to the second embodiment will be described. FIG. 11 is a schematic configuration diagram of a light emitting device according to the second embodiment. The light emitting device according to the second embodiment corresponds to the light emitting device according to claim 6. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 11, in the light emitting device 1A according to the second embodiment, one end 41a of the optical fiber 41 is fixed to the fiber fixing base 33 by the solder 32, and the other end 41b of the optical fiber 41 is soldered. 34 is fixed to the fiber fixing base 35. Thereby, the one end part 41a of the optical fiber 41 is arrange | positioned in the position facing the light entrance / exit surface 5a. The other end 41b of the optical fiber 41 is disposed at a position facing the light input / output surface 5b.

  A coupler 42 is provided in the middle of the optical fiber 41. The coupler 42 is for branching a part of the light guided through the optical fiber 41. The light guided through the optical fiber 32 is output to the outside.

  In the light emitting device 1A according to the second embodiment, the light emitted from the semiconductor optical amplifier 5 is guided in the C direction and the D direction, and is incident on the semiconductor optical amplifier 5 again. The light incident on the semiconductor optical amplifier 5 is amplified and then enters the optical fiber 41 and is guided. By repeating this operation, the light emitted from the semiconductor optical amplifier 5 is amplified and becomes laser light.

  Next, an assembly process of the light emitting device 1A according to the second embodiment will be described. 12-14 is a figure explaining the assembly process of the light-emitting device by 2nd Embodiment.

  First, as shown in FIG. 12, the thermistor 4, the submount 31 on which the semiconductor optical amplifier 5 is mounted, and the fiber fixing bases 33 and 35 are fixed to the wiring base 3. Next, an optical fiber 71 having a power meter 72 attached at one end is connected to the coupler 42.

  In the state shown in FIG. 12, a voltage is applied to the semiconductor optical amplifier 5. As a result, the semiconductor optical amplifier 5 is in an inverted distribution state, and light is emitted from the light incident / exit surfaces 5a and 5b. Here, when the light emitted from the light entrance / exit surfaces 5a and 5b does not enter any one of the end portions 41a and 41b of the optical fiber 41, the power meter 72 hardly detects the light. Specifically, as shown in FIG. 12, when the end portion 41b of the optical fiber 41 is disposed at a position where light does not enter, laser oscillation does not occur and the end portion 41a of the optical fiber 41 A small output of only the incident light is measured by the power meter 72.

  On the other hand, as shown in FIG. 13, when the light emitted from the light entrance / exit surfaces 5a and 5b is incident on both ends 41a and 41b of the optical fiber 41, the light guided through the optical fiber 41 is again a semiconductor. Return to the optical amplifier 5. As a result, stimulated emission occurs inside the semiconductor optical amplifier 5 in the inverted distribution state, and light is amplified. As a result, the light emitted from the semiconductor optical amplifier 5 and guided through the optical fiber 41 oscillates.

  Next, as shown in FIG. 14, the both ends 41a and 41b of the optical fiber 41 are fixed to the fiber fixing bases 33 and 35 at positions where laser oscillation is possible.

  As described above, in the light emitting device 1A according to the second embodiment, the optical fiber 41 and the semiconductor optical amplifier are used so that the light emitted from the semiconductor optical amplifier 5 is laser-oscillated and the laser light is detected by the power meter 72. Alignment with 5 is performed. As described above, since the alignment is performed by the laser light that is easily detected by the power meter 72, the optical fiber 41 and the semiconductor optical amplifier 5 can be easily aligned.

  Further, in the light emitting device 1A according to the second embodiment, since the both end portions 41a and 41b of the optical fiber 41 can be aligned at the same time, the assembly process can be simplified.

(Third embodiment)
Next, a third embodiment in which the alignment method of the second embodiment is partially changed will be described.

  In the assembly process of the light emitting device 1A of the third embodiment, first, the one end portion 41a of the optical fiber 41 is aligned and fixed by the alignment method according to the first embodiment. Thereafter, a voltage is applied to the semiconductor optical amplifier 5 to emit light. Then, based on the alignment method according to the second embodiment, the other end portion 41b of the optical fiber 41 is aligned so that the light guided through the optical fiber 41 detected by the power meter 72 becomes laser light.

  As mentioned above, although this invention was demonstrated in detail using embodiment, this invention is not limited to embodiment described in this specification. The scope of the present invention is determined by the description of the scope of claims and the scope equivalent to the description of the scope of claims. Hereinafter, modified embodiments in which the above-described embodiment is partially modified will be described.

  For example, the material, shape, numerical value, and the like of each component in the above-described embodiment are examples and can be changed as appropriate.

  In the above-described embodiment, an optical fiber is used as the optical waveguide. However, an optical waveguide formed on another substrate may be used.

  In the embodiment described above, a semiconductor optical amplifier is employed as the light emitting element, but a semiconductor light emitting diode, an organic EL element, or the like may be employed.

  In the above-described embodiment, the laser light is detected by the power meter including the photodiode, but the laser light may be detected visually.

It is a top view of the light-emitting device by a 1st embodiment. It is an internal side view of a light-emitting device. It is a perspective view of a semiconductor optical amplifier. It is an enlarged view of an optical fiber and a fiber connector. It is a figure for demonstrating the assembly process of the light-emitting device by 1st Embodiment. It is a figure for demonstrating the assembly process of the light-emitting device by 1st Embodiment. It is a figure for demonstrating the assembly process of the light-emitting device by 1st Embodiment. It is a figure for demonstrating the assembly process of the light-emitting device by 1st Embodiment. It is a figure for demonstrating the assembly process of the light-emitting device by 1st Embodiment. It is a figure for demonstrating the assembly process of the light-emitting device by 1st Embodiment. It is a schematic block diagram of the light-emitting device by 2nd Embodiment. It is a figure explaining the assembly process of the light-emitting device by 2nd Embodiment. It is a figure explaining the assembly process of the light-emitting device by 2nd Embodiment. It is a figure explaining the assembly process of the light-emitting device by 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A Light-emitting device 2 Peltier device 2 Semiconductor optical amplifier 5 Semiconductor optical amplifier 5a, 5b Optical input / output surface 6, 7 Optical fiber 6a, 6b End part 7a, 7b End part 8, 9 Fiber connector 8a, 9a Optical input / output surface 11 Board | substrate DESCRIPTION OF SYMBOLS 12 Semiconductor laminated part 15, 16 Antireflection film 21 N type semiconductor layer 22 Active layer 23 P type semiconductor layer 24 Stripe part 32 Optical fiber 32, 34 AuSn solder 33, 35 Fiber fixing stand 41 Optical fiber 41a, 41b End part 42 Coupler 51 Adapter 52 Semi-reflective member 53, 55 Fiber connector 55a Light input / output surface 54 Optical fiber 56 Power meter 57 Total reflection member 61 Adapter 62 Semi-reflective member 63, 65 Fiber connector 65a Light input / output surface 64 Optical fiber 71 Optical fiber 72 Power meter

Claims (8)

A light emitting element having a first light entrance / exit surface on which light is incident or emitted, and capable of amplifying the light;
A first optical waveguide having one end disposed at a position facing the first light entrance / exit surface in order to guide the light emitted from the light emitting element or the light incident on the light emitting element;
A light-emitting device, wherein the light-emitting element and the optical waveguide are aligned by a laser beam obtained by laser oscillation of light emitted from the light-emitting element.   The light emitting element and the first optical waveguide are aligned by the laser light generated by the first reflecting member and the second reflecting member which are disposed at positions facing each other with the light emitting element and the first optical waveguide interposed therebetween. The light-emitting device according to claim 1.   The light emitting device according to claim 2, wherein the first reflecting member can transmit a part of light.   The light emitting element and the first optical waveguide are measured while measuring the laser beam with a power meter that is disposed at a position opposite to the first optical waveguide and sandwiches the first reflective member and can measure the output of light. The light emitting device according to claim 3, wherein the alignment is performed. The light emitting element has a second light entrance / exit surface facing the first light entrance / exit surface,
A second optical waveguide having one end disposed at a position facing the second light entrance / exit surface;
The light emitting element and the light emitting element are generated by laser light that is laser-oscillated by the third reflecting member disposed at the other end of the second optical waveguide and the first reflecting member disposed at the other end of the first optical waveguide. The light-emitting device according to claim 3, wherein alignment of the second optical waveguide is performed. The light emitting element has a second light entrance / exit surface facing the first light entrance / exit surface,
The other end of the first optical waveguide is disposed at a position facing the second light entrance / exit surface,
Alignment of the light emitting element and the first optical waveguide so that laser light is detected by a power meter capable of measuring light emitted from the light emitting element and incident and guided from both ends of the first optical waveguide. The light-emitting device according to claim 1, wherein:   The light emitting device according to any one of claims 1 to 6, wherein the optical waveguide is disposed at a position where the laser beam is maximized.   The light-emitting device according to claim 1, wherein the optical waveguide is disposed at a position where a current threshold for causing laser oscillation is minimized.

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