Tunable laser using microring resonator
First Claim
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1. 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.
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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.
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28 Claims
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1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
- 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
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27. 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.
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28. 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.
- 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
Specification