Tunable laser using microring resonator
AssigneeLambda Crossing Ltd.
InventorsMeir Orenstein, Moti Margalit
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Abstract
A tunable semiconductor laser device is presented. The device comprises a laser structure formed by at least two waveguides and an active region located within at least a segment of one of the waveguides; and comprises a tunable spectral filter optically coupled to the laser structure. The tunable spectral filter includes at least two filtering elements, at least one of them being a microring cavity.
Claims28
An integrated tunable semiconductor laser device, wherein a laser cavity of the device is formed as a waveguide structure comprising:
- at least two spaced-apart waveguides with an active gain region located within at least a segment of one of said at least two waveguides, and a phase element located within a said segment of one of said at least two waveguides and operative to match the overall phase of the laser cavity;
- and a tunable spectral filter including at least two filtering elements, at least one of said filtering elements including a closed loop waveguide constituted as a microring cavity accommodated between said two spaced-apart waveguides for coupling light in between said two spaced-apart waveguides and operable as a tunable spectral sequence filtering element.
A method of fabricating an integrated tunable semiconductor laser device, the method comprising forming a laser cavity as a waveguide structure including two spaced-apart waveguides with an active region being located within at least a segment of one of the waveguides and with a phase element being located in a segment of one of said at least two waveguides to match the overall phase of the laser cavity, and configuring a tunable spectral filter from at least two microring cavities accommodated between the two spaced-apart waveguides and being optically coupled to said at least two waveguides and to each other, to thereby provide for coupling light in between the two spaced-apart waveguides and enable tuning of the device by tuning the microring cavities relatively to each other to apply a Vernier effect.
An integrated tunable semiconductor laser device having a laser cavity comprising at least two waveguides with an active gain region being located within at least a segment of one of said at least two waveguides;
- a phase element located in a region of one of said at least two waveguides and operating to match the overall phase of the laser cavity;
- and a tunable spectral sequence filter including at least two closed loop waveguides presenting microring cavities that are accommodated between said two spaced-apart waveguides coupling light propagation therebetween while effecting tunable spectral sequence filtering, the device being tunable by tuning the microring cavities relatively to each other to thereby apply a Vernier effect.
Dependencies are inferred from the claim text.