LASER LIGHT SOURCE, INTERFEROMETER AND SPECTROMETER

摘要

A VHG element (42) of a laser light source (40) returns light of a specific wavelength emitted from a semiconductor laser (41) to the semiconductor laser (41), causes resonance to be generated between the semiconductor laser (41) and the actual VHG element (42) to thereby amplify the light, and emits the light. The laser light source (40) comprises a fibre (45) that guides the light of the specified wavelength that is emitted from the VHG element (42) and incident through a lens (43). The fibre (45) is comprises a single-mode fibre or a polarisation plane-maintaining fibre.