| 摘要 |
a temperature control unit (12) having a Peltier element (9), a heat sink (10), and a base substrate (11); and a laser unit (8) having a laser diode (2), a lens (3), a grating (5), a first support unit (5), and a second support unit (6). The heat sink (10) is connected vertically to the base substrate (11). The Peltier element (9) is connected to the heat sink (10). Moreover, the second support unit (6) of the laser unit (8) is connected to the Peltier element (9) at the opposite side of the heat sink (10). Heat from the laser diode (2), the lens (3), the grating (5) and the like constituting an external resonance type semiconductor laser propagates via the second support unit (6), the Peltier element (9), the heat sink (10), and the base substrate (11). The distance between the base substrate (11) and the laser unit (8) is maintained to a certain value or above, so that the heat propagation to the laser unit (8) is effectively cut off.
|
