SEMICONDUCTOR LASER MODULE AND RAMAN AMPLIFIER USING THE MODULE

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor laser module which provides a high level output regardless of the variation in the operating environmental temperature, has low noise, provides a good stability in the wavelength and has good reliability. SOLUTION: A thermomodule 25 is mounted on a bottom plate 26 of a package 27. A base 2 is mounted on the thermomodule 25. The base 2 is mounted/ with a laser diode 1, a first optical fiber 4 which feedbacks laser light beams emitted from one end 31 of the diode 1 top the diode 1 and fixing means 6 and 7 which support the fiber 4 at its two longitudinal direction points. A second optical fiber 13 is provided on the other end 30 side of the diode 1 to receive and transmit the laser beams. An axis line section 33 which connects a laser light beams emitting surface 1 of the end 31 of the diode 1 and a laser light beam receiving end 32 of the fiber 4 is provided to the end side rather than a laser optical axis direction center (c of Figure 1) section of the thermomodule 25.