Highly stable semiconductor lasers and sensors for III-V and silicon photonic integrated circuits

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United States of America Patent

PATENT NO 11761892
SERIAL NO

17407263

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Abstract

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Building blocks are provided for on-chip chemical sensors and other highly-compact photonic integrated circuits combining interband or quantum cascade lasers and detectors with passive waveguides and other components integrated on a III-V or silicon. A MWIR or LWIR laser source is evanescently coupled into a passive extended or resonant-cavity waveguide that provides evanescent coupling to a sample gas (or liquid) for spectroscopic chemical sensing. In the case of an ICL, the uppermost layer of this passive waveguide has a relatively high index of refraction that enables it to form the core of the waveguide, while the ambient air, consisting of the sample gas, functions as the top cladding layer. A fraction of the propagating light beam is absorbed by the sample gas if it contains a chemical species having a fingerprint absorption feature within the spectral linewidth of the laser emission.

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Patent Owner(s)

  • THE GOVERNMENT OF THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bewley, William W Falls Church, US 34 241
Canedy, Chadwick Lawrence Washington, US 27 151
Kim, Chul Soo Springfield, US 103 697
Kim, Mijin Springfield, US 50 240
Merritt, Charles D Fairfax, US 27 154
Meyer, Jerry R Catonsville, US 54 529
Vurgaftman, Igor Severna Park, US 52 413
Warren, Michael V Arlington, US 19 106
Weiblen, R Joseph Washington, US 12 33

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