Heat sink, semiconductor laser device, semiconductor laser module and raman amplifier

A semiconductor laser module comprising:

• a semiconductor laser device including a semiconductor laser diode for emitting a laser beam and having first and second beam emission facets and a heat sink on the top of which said semiconductor laser diode is placed, the top of said heat sink including at least one bevel formed therein on either side of the first or second beam emission facet in said semiconductor laser diode, said bevel being sloped downwardly toward the bottom of said heat sink;
• and
• an optical system for receiving the laser beam emitted from either of the first or second beam emission facet in the semiconductor laser diode on said semiconductor laser device.

A Raman amplifier comprising:

• a semiconductor laser modules each including a semiconductor laser device, said semiconductor laser device including a semiconductor laser diode having first and second beam emission facets for emitting laser beams and a heat sink on the top of which said semiconductor laser diode is placed, said heat sink including at least one bevel formed on the top of said heat sink on either side of the first or second beam emission facet in said semiconductor laser diode, said bevel being sloped downwardly toward the bottom of said heat sink, and an optical system for receiving a laser beam emitted from either of the first or second beam emission facet in the semiconductor laser diode on said semiconductor laser device;
• and
• an optical fiber for transmitting a signal beam, said optical fiber being adapted to combine pump beams emitted from said semiconductor laser modules with the signal beam transmitted through said optical fiber.