| 摘要 |
PROBLEM TO BE SOLVED: To provide a wavelength variable type optical transmission module capable of highly precisely achieving laser beams with inexpensive and optional wavelengths without using DFB laser or Peltier element.SOLUTION: The wavelength variable type optical transmission module 10 includes: a light-emitting device 11 that is Fabry-Perot semiconductor laser; a plurality of band-pass filters 12a-d that pass only the light of a specific wavelength from laser beams output by the light-emitting device 11, and an optical switch 13 that determines which of the band-pass filters permits laser beams output from the light-emitting device to pass through for switching according to a switching input from the outside. |
