Semiconductor laser diode module

摘要

A semiconductor laser diode module (27) in which a laser diode (1) and an optical fiber (4) are optically coupled with each other efficiently irrespective of an ambient temperature change within the laser diode module (27). The laser diode module (27) includes a laser diode (1), an optical system including an optical fiber (4) and a lens portion (14), a base (2) configured to support the laser diode (1) and at least a portion of the optical system, and a bottom plate (28) configured to support the laser diode (1), the optical system, and the base (2). A portion of the base (8) is made of a material having a first thermal expansion coefficient and the bottom plate (28) is constructed of a material having a second thermal expansion coefficient, where the first thermal expansion coefficient is substantially equal to the second thermal expansion coefficient. The optical system is configured to receive and transmit a beam emitted from the laser diode (1) through the lens portion (14) to the optical fiber (4).