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US 6,295,308 B1Granted
Wavelength-locked external cavity lasers with an integrated modulator
AssigneeCorning Incorporated
InventorChung-en Zah
Life of this patent
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Abstract
An optical transmitter providing the benefits of both filter-locked and wavelength-locked lasers is disclosed by modifying an external cavity (32) for the integration of an optical modulator (14). The external cavity (32) provides a round-trip path for light travel. A substrate (24) is connected to the external cavity (32) where at least one gain element (16) and the optical modulator (14) are integral with the substrate (24). A partial reflector (40) is also integral with the substrate (24) and couples the at least one gain element (16) with the optical modulator (14).
Claims20
An optical transmitter module comprising:
- a substrate having a first anti-reflection end and a second anti-reflection end;
- an external reflector coupled to the first anti-reflection end of the substrate for providing an external cavity for providing a round-trip path for light travel and the external reflector providing a first cavity end for a modified extended laser cavity which is extended from the external cavity;
- at least one gain element included within the modified extended laser cavity and the at least one gain element processed integral with the substrate and near the first anti-reflection end;
- an optical modulator for providing external modulation external to the modified extended laser cavity and the optical modulator processed integral with the substrate and near the second anti-reflection end;
- and
- a partial reflector processed integral with the substrate and coupling the at least one gain element with the optical modulator, the partial reflector providing a second cavity end for the modified extended laser cavity.
3 more elements
An optical transmitter comprising:
- an external cavity for providing a round-trip path for light travel;
- a substrate connected to the external cavity, the substrate having a first anti-reflection end and a second anti-reflection end;
- an external reflector coupled to the first anti-reflection end of the substrate for providing the external cavity and the external reflector serving as a first cavity end for a modified extended laser cavity which is extended from the external cavity;
- at least one gain element included within the modified extended laser cavity and the at least one gain element integral with the substrate and near the first anti-reflection end;
- an optical modulator for providing external modulation external to the modified extended laser cavity and the optical modulator integral with the substrate and near the second anti-reflection end;
- and
- a partial reflector integral with the substrate and coupling the at least one gain element with the optical modulator, the partial reflector providing a second cavity end for the modified extended laser cavity.
4 more elements
An optical transmitter comprising:
- an external cavity for providing a round-trip path for light travel;
- a substrate connected to the external cavity, the substrate comprising a waveguide having a first and second opposed AR coated facets;
- an external reflector coupled to the first opposed AR coated facet of the waveguide for providing the external cavity and the external reflector serving as a first cavity end for a modified extended laser cavity which is extended from the external cavity;
- at least one gain element included within the modified extended laser cavity and the at least one gain element integral with the substrate and near the first opposed AR coated facet;
- an optical modulator for providing external modulation external to the modified extended laser cavity and the optical modulator integral with the substrate and near the second opposed AR coated facet;
- a partial reflector integral with the substrate and coupling the at least one gain element with the optical modulator, the partial reflector providing a second cavity end for the modified extended laser cavity.
3 more elements
Dependencies are inferred from the claim text.