Laser to optical fiber coupling专利检索-光放大器激光振荡器振荡器电子零件及设备专利检索查询-专利查询网

Laser to optical fiber coupling

阅读：846发布：2023-10-29

专利汇可以提供Laser to optical fiber coupling专利检索，专利查询，专利分析的服务。并且An optical fiber is coupled along an edge of a rectangular GaAs injection laser. A circulatory mode of light reflection is established between the four side walls of the laser at an angle of incidence which provides a narrow rectangular strip of light. The fiber is positioned transversely at one reflection point or corner of the light path. A narrow rectangular metal strip contact on one face of the laser confines current to the desired path. A reflective coating on an end of the fiber may provide a unidirectional optical source. Other variations include an optical amplifier for a light input source and an optical coupler from an input fiber to an output fiber.，下面是Laser to optical fiber coupling专利的具体信息内容。

权利要求

1. An optical coupling arrangement comprising a semiconductor laser having two opposite rectangular faces and four adjoining reflecting side walls, a P-N junction region extending parallel to said faces and having edges along said side walls, said laser being adapted to lase within said junction in a circulatory mode between said side walls, light reflection within said junction being at an angle of incidence with each wall to provide a narrow strip of light having a corner reflection point on each side wall, and an elongated optical fiber having a side attached along one side wall of the laser junction region such that a portion of the length of the fiber is optically coupled with one reflection point of said circulatory mode.

2. An arrangement as claimed in claim 1 wherein said optical fiber includes an outer tubular cladding about an inner cylindrical core, a length of said core being in line and optically coupled with the p-n junction of the laser.

3. An arrangement as claimed in claim 2 including means for confining current across said p-n junction to within an area corresponding to said narrow strip of light to enable said circulatory mode to be preferentially excited.

4. An arrangement as claimed in claim 3 wherein said means comprises a narrow metallic contact strip on one face having a shape conforming to said narrow strip of light within said p-n junction.

5. An arrangement as claimed in claim 4 wherein the p-n junction of the laser lies in a layer of gallium arsenide.

6. An arrangement as claimed in claim 5 wherein the laser includes an inner junction layer of GaAs and respective layers of GaA1As on opposite sides of said inner layer.

7. An arrangement as claimed in claim 4 wherein a refractive index matching interference layer is interposed between the core and the adjacent edge of the laser, said layer extending along only that portion of the edge at which the laser radiation is incident.

8. An arrangement as claimed in claim 7 wherein said interference layer is a three-quarter wavelength layer.

9. An arrangement as claimed in claim 4 wherein said metallic strip is in the shape of a parallelogram having four corners centered along respective side walls at said junction, the remainder of said face having a cover layer of silica.

10. An arrangement as claimed in claim 9 wherein the circulatory mode is such that the radiation propagating in the laser in said mode completes a closed path after making exactly one reflection in each of the four side walls.

11. An arrangement as claimed in claim 9 wherein said laser side wall is coupled to a portion of said cladding of lower refractive index than the core and the circulatory mode makes an excursion into said portion being reflected therein at near grazing incidence.

12. An arrangement as claimed in claim 11 wherein said lower refractive index portion is a length of optical fiber sectioned along it axis through a diameter and the reflection therein is at the curved interface between the inner core and outer cladding.

13. An arrangement as claimed in claim 12 wherein an anti-reflection interference layer is interposed between said portion of lower refractive index and the remainder of the laser.

14. An arrangement as claimed in claim 9 wherein said optical fiber includes a reflectivE coating at one end.

15. An arrangement as claimed in claim 9 including a second optical fiber coupled to said laser along an opposite side wall.

说明书全文

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Laser to optical fiber coupling

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