Patent ID: 6792215
Filing Date: 2004-09-14
Classification: H04B,H04J

Abstract:
A multi-wavelength light source apparatus comprising:a tunable light source for successively changing and outputting a plurality of output lights different in wavelength from one another; an optical intensity modulator for modulating an amplitude of the output light outputted from said tunable light source over a predetermined time and outputting the modulated signal light; an optical coupler, optically connected to said optical intensity modulator, for receiving the output light outputted from said optical intensity modulator; an annular optical delay circuit, optically connected to said optical coupler, for delaying a part of the output light outputted from said optical intensity modulator over a time longer than said predetermined time; and an optical gate device, optically connected to said optical coupler, for receiving the output light outputted from said optical intensity modulator and the light which passed said annular optical delay circuit, to open a gate at a timing and a time width such that all of the signal light amplitude-modulated over said predetermined time is included one by one for each of said plurality of wavelengths.