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US 11,108,211 B1Granted
Optical injection-locked laser
AssigneeHRL Laboratories, LLC
InventorsDaniel Yap, Monica Minden
Life of this patent
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Abstract
The invention is a Demodulator for an Optical Analog Pulse Position Modulated signal suitable for inclusion in receivers for Free Space Optical communication systems. In one embodiment the Demodulator may use the pulse position modulated optical information signal and the clock signal with different wavelengths. By proper biasing of a Semiconductor Optical Amplifier and selection of wavelengths for the information signal and the clock signal, the performance of the Demodulator is made insensitive to noise in the received signals.
Claims4
An optical injection-locked laser receiving an optical input pulse comprising:
- a ring cavity comprising a first optical coupler, a second optical coupler, a third optical coupler, an optical modulator, and a gain element wherein the ring cavity has a circulating laser light defining an optical path of the ring cavity;
- the first optical coupler coupling light from a pump laser into the ring cavity;
- the third optical coupler within the optical path of the ring cavity and coupling the optical input pulse into the ring cavity;
- the second optical coupler coupling a portion of the circulating laser light out of the ring cavity;
- and
- the optical modulator synchronized to the optical input pulse and attenuating the circulating laser light in response to an external input.
3 more elements
Dependencies are inferred from the claim text.