Lensed polarization maintaining fiber and its manufacturing method, and semiconductor laser module using the same and its manufacturing method
AssigneeFurukawa Electric Co., Ltd.
InventorsTeruo Kusano, Toshio Mugishima, Jun Miyokawa
Life of this patent
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Abstract
A lensed polarization maintaining fiber having a lens on an end thereof has a core, two stress-applied regions disposed on both sides of the core, respectively, and a clad containing the core and stress-applied regions. The lens has at least an inclined face, the inclined face including an edge. Each of the stress-applied regions is exposed on the inclined face except the edge.
Claims26
A lensed polarization maintaining fiber having a lens on an end thereof, the fiber comprising:
- a core;
- a pair of stress-applied regions disposed on opposite sides of the core, respectively;
- and
- a clad containing said core and stress-applied regions,
- wherein the lens has at least one inclined face including an edge, and
- each of said stress-applied regions is exposed on the at least one inclined face, but not exposed on the edge.
A method for manufacturing a lensed polarization maintaining fiber from a polarization maintaining fiber, the method comprising the steps of:
- cleaving the polarization maintaining fiber to make a fiber end, said polarization maintaining fiber having a core, a pair of stress-applied regions disposed on opposite sides of the core, and a clad containing said core and stress-applied regions;
- and
- forming a lens from said fiber, including forming at least one inclined face, the at least one inclined face including an edge, and exposing each of said stress-applied regions on the inclined face, but not on the edge.
A semiconductor laser module comprising:
- a package;
- a semiconductor laser device housed in said package, the semiconductor laser device having an active layer and a laser beam emitting face included at one end of the active layer;
- and
- a lensed polarization maintaining fiber having a lens on one end thereof, the lens being opposed to the beam emitting face so as to receive light emitted from the laser beam emitting face of the semiconducting laser device and configured to guide the light to an outside of said package, said lensed polarization maintaining fiber having
- a core,
- a pair of stress-applied regions disposed on opposite sides of the core, and
- a clad containing the core and stress-applied regions, wherein
- the lens has at least one inclined face including an edge, and
- each of said stress-applied regions is exposed on the at least one inclined face, but not exposed on the edge.
A method for manufacturing a semiconductor laser module, comprising the step of:
- setting in a package a semiconductor laser device with a laser light emitting face opposed to a lensed polarization maintaining fiber, said light emitting face being set opposed to an end of said lensed polarization maintaining fiber, the lensed polarization maintaining fiber having a core,
- a pair of stress-applied regions on opposite sides of the core, and
- a clad containing said core and pair of stress-applied regions;
- wherein the lens has at least one inclined face, including an edge, and
- each of said stress-applied regions is exposed on the at least one inclined face, but not exposed on the edge.
Dependencies are inferred from the claim text.