Transceiver method and apparatus having phase modulation and common mode phase drift rejection

JR Demers - US Patent 9,239,264, 2016 - Google Patents
Highly advantageous transceiver systems with common mode phase drift rejection and
associated methods are dis closed which utilize certain phase modulators in configura tions …

Terahertz frequency domain spectrometer with controllable phase shift

RT Logan Jr, JR Demers - US Patent 7,781,736, 2010 - Google Patents
An apparatus for analyzing, identifying or imaging an target including an integrated dual
laser module coupled to a pair of photoconductive switches to produce cw signals in the …

Terahertz frequency domain spectrometer with integrated dual laser module

RT Logan Jr, JR Demers, BL Kasper - US Patent 7,936,453, 2011 - Google Patents
The invention relates to microwave, millimeter wave and Submillimeter wave spectroscopy
systems and components and in particular to an integrated dual laser module for use in a …

Terahertz frequency domain spectrometer with frequency shifting of source laser beam

RT Logan Jr, JR Demers - US Patent 8,604,433, 2013 - Google Patents
An apparatus for analyzing, identifying or imaging an target including first and second laser
beams coupled to a pair of photoconductive switches to produce CW signals in one or more …

Terahertz frequency domain spectrometer with phase modulation of source laser beam

JR Demers, RT Logan Jr - US Patent 9,029,775, 2015 - Google Patents
An apparatus for analyzing, identifying or imaging an target including first and second laser
beams coupled to a pair of photoconductive switches to produce CW signals in one or more …

Terahertz spectrometer phase modulator control using second harmonic nulling

JR Demers, BL Kasper - US Patent 9,103,715, 2015 - Google Patents
Apparatus for analyzing, identifying, or imaging a target is configured to avoid and/or prevent
nulls that may occur peri odically during a terahertz, Sweep. Exemplary apparatus may …

Terahertz frequency domain spectrometer with discrete coarse and fine tuning

RT Logan Jr, JR Demers - US Patent 8,829,440, 2014 - Google Patents
An apparatus for analyzing, identifying or imaging an target including first and second laser
beams coupled to a pair of photoconductive switches to produce CW signals in one or more …

Terahertz spectrometer and method for reducing photomixing interference pattern

BL Kasper, JR Demers - US Patent 9,429,473, 2016 - Google Patents
US9429473B2 - Terahertz spectrometer and method for reducing photomixing interference
pattern - Google Patents US9429473B2 - Terahertz spectrometer and method for reducing …

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

JR Meyer, I Vurgaftman, CL Canedy… - US Patent …, 2023 - Google Patents
Building blocks are provided for on-chip chemical sensors and other highly-compact
photonic integrated circuits combining interband or quantum cascade lasers and detectors …

Method and apparatus for analyzing, identifying or imaging a target

RT Logan, JR Demers - US Patent 8,957,377, 2015 - Google Patents
Related US Application Data Division of application No. 13/831,438, filed on Mar. 14, 2013,
now Pat. No. 8,829,440, which is a division of application No. 12/861,651, filed on Aug. 23 …