Optical coherent receiver with local oscillator laser having hybrid cavity
AssigneeAgilent Technologies, Inc.
InventorDouglas Baney
Life of this patent
Estimating the term…
Abstract
A coherent optical receiver includes a local oscillator (LO) laser configured to provide an LO signal. The LO laser includes a hybrid external cavity and an active gain medium within the hybrid external cavity, where the LO laser is defined between a first optical reflector on a chip including the active gain medium and a second optical reflector not on the chip.
Claims20
A coherent optical receiver, comprising:
- a local oscillator (LO) laser configured to provide an LO signal, the LO laser comprising a hybrid cavity and an active gain medium within the hybrid cavity, the LO laser being defined between an interior first optical reflector on a chip including the active gain medium and an external second optical reflector not on the chip.
A local oscillator (LO) laser of a coherent optical receiver comprising an optical coupling system for adding an input optical signal with an LO signal from the LO laser and a plurality of photodetectors, the LO laser comprising:
- a semiconductor chip comprising an active gain medium of the LO laser;
- a first optical reflector formed on the semiconductor chip;
- a second optical reflector not on the semiconductor chip, the first and second optical reflectors defining a hybrid external cavity containing the active gain medium;
- and
- a beam directing element located between the active gain medium and the second optical reflector, the beam directing element configured to focus optical signals reflected from the second optical reflector into a waveguide coupled to the active gain medium, enabling laser action to provide the LO signal to the optical coupling system.
A coherent optical receiver, comprising:
- a local oscillator (LO) laser configured to provide an LO signal, the LO laser comprising a main cavity, a coupling cavity, and an active gain medium within at least the main cavity,
- wherein the main cavity is defined between first and second optical reflectors on a chip including the active gain medium, and
- wherein the coupling cavity is defined by the first optical reflector and a third optical reflector not on the chip, the third optical reflector reflecting an optical signal coupled from the main cavity back into the main cavity after a time-delay.
Dependencies are inferred from the claim text.