Tunable laser
AssigneeNEC Corporation
InventorHiroyuki Yamazaki
Life of this patent
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Abstract
A tunable laser has a multiple ring resonator comprising a plurality of ring resonators having respective ring-shaped waveguides and respective different optical path lengths, an input/output side optical waveguide coupled to the multiple ring resonator, an optical input/output device such as a laser diode coupled to the input/output side optical waveguide, a reflection side optical waveguide coupled to the multiple ring resonator, an optical reflector coupled to the reflection side optical waveguide for removing light at an unwanted wavelength and reflecting light at a required wavelength, and a wavelength varying mechanism for changing the resonant wavelength of the multiple ring resonator.
Claims22
A tunable laser comprising:
- a multiple ring resonator comprising a plurality of ring resonators having respective ring-shaped waveguides and respective different optical path lengths;
- a first optical waveguide coupled to said multiple ring resonator;
- an optical input/output device coupled to said first optical waveguide;
- a second optical waveguide coupled to said multiple ring resonator;
- an optical reflector coupled to said second optical waveguide, said optical reflector removing light at an unwanted wavelength and reflecting light at a required wavelength;
- and
- a wavelength varying mechanism for changing the resonant wavelength of said multiple ring resonator.
Dependencies are inferred from the claim text.