JPH05121838A - Semiconductor laser chip carrier and polarized wave synthesis system - Google Patents

Abstract

PURPOSE:To provide a small-sized low-cost polarized synthesis system, which synthesizes vertical and horizontal polarized waves, by making alignment easy for an optical axis of light emitted from a semiconductor laser device. CONSTITUTION:Two semiconductor laser devices 21 and 22 are mounted on a chip carrier 11 in such a way that the vertically polarization face of light from the semiconductor laser device 21 meets light 101 emitted from the semiconductor laser device 22 at right angles on the same plane at equal distances from these laser devices. A polarization synthesizing film 41 is set at this point of intersection, and then synthesized light is generated with lenses 31, 32 and 33 and is issued to an optical fiber 51.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor element chip carrier used in optical communication using a semiconductor laser, an optical information processing system and the like.

[0002]

2. Description of the Related Art In optical fiber communication systems and optical switching systems, polarization combining of light from two semiconductor lasers is often used.

For example, referring to FIG. 3, two semiconductor laser modules 81 and 82 are connected to optical fiber terminals 52 and 54 of a polarization combiner 110 via polarization maintaining optical fibers 61 and 62, respectively. ing. Horizontally polarized outgoing light 102 from the semiconductor laser module 81 and vertically polarized outgoing light 92 from the semiconductor laser module 82.
And are irradiated onto the polarization combining film 42 via the optical fiber coupling lenses 34 and 35, respectively, and are combined. The combined light is output to the optical fiber 50 via the optical fiber coupling lens 36 and the optical fiber terminal 53.

In the field of optical fiber amplifiers having the configuration shown in FIG. 3, the polarization combiner 110 combines the emitted lights 102 and 92 of the two pumping semiconductor laser modules 81 and 82 to obtain high-power pumping light. It is possible. Further, in the field of highly reliable optical communication system, one semiconductor laser module can be used as a normal light source and the other one can be used as a spare.

The above-mentioned conventional semiconductor laser module is
As shown in FIG. 5, the semiconductor laser device 23 is arranged on the upper surface of the chip carrier 12. The polarization of the emitted light 103 is horizontal. Attach this chip carrier to the package,
The lens couples the semiconductor laser device and the polarization maintaining optical fiber.

[0006]

However, in the conventional optical polarization combiner shown in FIG. 4, it is necessary to mount each semiconductor laser element on a chip carrier as shown in FIG. 5 to form a module. Since the polarization maintaining optical fiber is used, there are problems that the optical axis adjustment is difficult in assembly and the polarization maintaining optical fiber is expensive.

[0007]

The semiconductor laser chip carrier of the present invention generates a first outgoing light having a vertical polarization plane and a second outgoing light having a horizontal polarization plane to be polarization-combined. The first semiconductor laser device and the second semiconductor laser device are mounted so that the first and second emitted lights intersect at right angles from respective sources on the same plane at right angles.

In the polarization combining system of the present invention, a polarization combining film is arranged at the intersection of the first and second emitted lights of the semiconductor laser chip carrier having the above structure, and the polarization combining film and the lens are used to interpose the polarization combining film. It is a configuration for outputting the first and second outgoing lights that have been polarization-combined to one optical fiber.

[0009]

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is an external view of an embodiment of the present invention.
Drawing (a) is the top view and drawing (b) is the perspective view. In the chip carrier 11 on which the first semiconductor laser device 21 and the second semiconductor laser device 22 are mounted,
The emitted light 91 of the semiconductor laser device 21 has a polarization plane perpendicular to
The polarization plane of the emitted light 101 of the semiconductor laser element 22 is horizontal, and the emission directions of the semiconductor laser elements 21 and 22 intersect each other at right angles on the same plane. Two semiconductor laser elements 21 and 22 are mounted so as to be equal to each other. The chip carrier 11 is made of copper and has a surface 11a of a base portion on which the semiconductor laser elements 21 and 22 are mounted.
11b is a flat surface, which allows easy alignment of the semiconductor laser elements 21 and 22. A vapor deposition film of gold is formed on the upper and lower electrode surfaces of the semiconductor laser elements 21 and 22. Fused.

FIG. 2 shows a basic configuration example of an optical polarization combining system using the semiconductor laser chip carrier of the present invention. Semiconductor laser device 21 of chip carrier 11,
Lights 91 and 101 emitted from the beam 22 are generated by the polarization combining film 41,
The first lens 31 and 32 and the second lens 33 are coupled to the optical fiber 51. With this optical system, two semiconductor laser devices can be mounted in the same module, and the optical axis can be adjusted extremely easily.

[0012]

As described above, according to the present invention, since two semiconductor laser elements are mounted on the same chip carrier, the light from these two semiconductor laser elements can be adjusted to one without any trouble in adjusting the optical axis. It is possible to easily realize combining in one module and outputting to one optical fiber. As a result, it is possible to realize downsizing and cost reduction as compared with the conventional method of using two optical semiconductor laser modules and one photosynthesizer, and to have a wide range of applications (for example,
Optical wavelength multiplexing, optical transmission line redundancy, etc.) can be expected.

[Brief description of drawings]

FIG. 1 is an external view of an embodiment of the present invention, which is a partial view (a).
Is a top view, and FIG.

FIG. 2 is a diagram showing a configuration example of an optical polarization combining system using the semiconductor laser chip carrier of the present invention.

FIG. 3 is a diagram showing a configuration example of an optical polarization combining system using a conventional semiconductor laser module.

FIG. 4 is a diagram showing a conventional semiconductor laser chip carrier.

[Explanation of symbols]

11, 12 Chip carrier 21, 22, 23 Semiconductor laser device 31, 32, 33, 34, 35, 36 Optical fiber coupling lens 41, 42 Polarization combining film 50, 51 Optical fiber 52, 53, 54 Optical fiber terminal 61, 62 polarization-maintaining optical fiber 81, 82 semiconductor laser module 91, 92 outgoing light of vertical knitting wave 101, 102, 103 outgoing light of horizontal polarization

Claims (2)

[Claims] 1. A first semiconductor laser device and a second semiconductor laser which respectively generate a first emitted light having a vertical polarization plane and a second emitted light having a horizontal polarization plane to be polarization-combined. A semiconductor laser chip carrier, wherein the device and the device are mounted so that the first and second emitted lights intersect at right angles from respective sources on the same plane. 2. A polarization synthesizing film is arranged at an intersection of the first and second emitted lights of the semiconductor laser chip carrier according to claim 1, and polarization synthesizing is performed through the polarization synthesizing film and the lens. A polarization beam combining system, wherein the first and second emitted lights are output to one optical fiber.