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US 12,578,529 B2Granted
Optical transmitter
AssigneeRockley Photonics Limited
InventorsYi Ho Lee, Jeffrey Driscoll, James Dongyoon Oh
Life of this patent
Estimating the term…
Abstract
A system including an optical transmitter. In some embodiments, the system includes: a first array of lasers; a first wavelength multiplexer, connected to the first array of lasers; a first coupler, connected to the wavelength multiplexer; and a first wavelength meter, connected to a first output of the first coupler.
Claims17
A system, comprising:
- a first array of lasers;
- a first wavelength multiplexer, connected to the first array of lasers;
- a first coupler, connected to the first wavelength multiplexer;
- a first wavelength meter, connected to a first output of the first coupler;
- and
- a first splitter having an input, a first output and a second output, wherein a first output of the first coupler is connected to the input of the first splitter,
- wherein:
- the first output of the first splitter is connected through a first optical path to a free propagation region;
- and
- the second output of the first splitter is connected through a second optical path to the free propagation region.
7 more elements
A system, comprising:
- a first array of lasers;
- a first wavelength multiplexer, connected to the first array of lasers;
- a first coupler, connected to the first wavelength multiplexer;
- a first wavelength meter, connected to a first output of the first coupler;
- a second array of lasers;
- a second wavelength multiplexer;
- and
- a second wavelength meter,
- the second wavelength multiplexer having:
- a plurality of inputs each connected to a respective one of the lasers of the second array of lasers, and
- an output,
- the output of the second wavelength multiplexer being connected to the second wavelength meter,
- wherein:
- the first wavelength meter is a Mach Zehnder interferometer wavelength meter,
- the second wavelength meter is a Mach Zehnder interferometer wavelength meter,
- frequencies of the lasers of the first array of lasers are uniformly spaced to within 20%,
- frequencies of the lasers of the second array of lasers are uniformly spaced to within 20%,
- an average frequency separation of the lasers of the first array of lasers is greater than an average frequency separation of the lasers of the second array of lasers by at least 30%,
- N/2 times a free spectral range of the first wavelength meter is within 10% of the average frequency separation of the lasers of the first array of lasers,
- M/2 times a free spectral range of the second wavelength meter is within 10% of the average frequency separation of the lasers of the second array of lasers, and
- N and M are integers.
18 more elements
Dependencies are inferred from the claim text.