Light generation method and light source

Details Light generation method and light source Light generation method and light source

H - Electricity

04

B

H04B 10/04 (2006.01) F21V 9/00 (2006.01) G02B 5/20 (2006.01) H01S 5/50 (2006.01) H04J 14/02 (2006.01) H01S 3/067 (2006.01) H01S 3/083 (2006.01) H01S 5/10 (2006.01)

Patent

CA 2295353

The present invention provides a light generation method and a light source that are preferable in obtaining a single-mode light having high outputs, a small wavelength spectral bandwidth, and a low intensity noise. A white output from a white-light source and having wavelength components over a wide-band in a wavelength spectrum passes through an isolator and is then filtered by a disc-shaped optical filter. A transmitted light is input to a semiconductor optical amplifier having its polarization plane regulated by a polarization controller. An output from the amplifier passes through an isolator and is then filtered by a disc-shaped optical filter again to generate a single-mode light having a small spectral bandwidth and high outputs. Polarization control by the polarization controller corresponds to control of the polarization plane of a semiconductor laser in the semiconductor optical amplifier so as to obtain a maximum gain from the amplifier. This configuration enables a single-mode light having a small spectral bandwidth and high outputs to be easily generated at an arbitrary wavelength.

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