| abstract |
An object of the present invention is to improve analog characteristics while suppressing generation of residual excitation light. An optical signal is amplified by an input unit (input port 11) for inputting an optical signal, a laser light source (laser diode 20) for generating laser light, and stimulated emission based on the laser light from the laser light source and output. Optical fiber (amplifying optical fiber 12), an output unit (output port 24) for outputting an optical signal amplified by the optical fiber, and a passive optical component (optical isolator) disposed between the optical fiber and the output unit 16 and the like, and the laser light source and / or the passive optical component and the optical fiber are thermally coupled via a thermally conductive medium. [Selection] Figure 1 |