Patent ID: 6125128
Filing Date: 2000-09-26
Classification: H01S,H04B

Abstract:
An optical device comprising:a source of light;a first transmission path coupled to said source of light;a filtering element coupled to said first transmission path for receiving said light, said filtering element having a transmissivity and reflectivity characteristic as a function of wavelength, said filtering element configured to transmit a first portion of said light associated with a particular wavelength and to reflect a second portion of said light which is outside of said particular wavelength;a second transmission path coupled to said filtering element, said second transmission path receiving said first portion of said light;an optical splitter coupled to said filtering element along said first transmission path, said splitter receiving said second portion of said light;a photodetector coupled to said optical splitter, said photodetector receiving said second portion of said light and generating a sense signal in response thereto;a control circuit receiving said sense signal, said control circuit generating a control signal, based on said sense signal, for controlling said light outputted from said light source.