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Title: Chemical detection and laser wavelength stabilization employing spectroscopic absorption via laser compliance voltage sensing

Patent ·
OSTI ID:1234485
;

Systems and methods are disclosed that provide a direct indication of the presence and concentration of an analyte within the external cavity of a laser device that employ the compliance voltage across the laser device. The systems can provide stabilization of the laser wavelength. The systems and methods can obviate the need for an external optical detector, an external gas cell, or other sensing region and reduce the complexity and size of the sensing configuration.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
Assignee:
BATTELLE MEMORIAL INSTITUTE (Richland, WA)
Patent Number(s):
9,236,709
Application Number:
14/153,853
OSTI ID:
1234485
Resource Relation:
Patent File Date: 2014 Jan 13
Country of Publication:
United States
Language:
English

References (15)

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Voltage change across the self-coupled semiconductor laser journal July 1981
Simultaneous laser-diode emission and detection for fiber-optic sensor applications journal January 1995
Quantum-cascade-laser structures as photodetectors journal October 2002
Measurements of the α factor of a distributed-feedback quantum cascade laser by an optical feedback self-mixing technique journal January 2006
Intra-cavity absorption spectroscopy with narrow-ridge microfluidic quantum cascade lasers journal January 2007
Self-mixing interferometry with a terahertz Quantum Cascade Laser: Feedback induced voltage signal conference December 2010
Infrared intracavity laser absorption spectrometer conference April 2010
Terahertz imaging through self-mixing in a quantum cascade laser journal January 2011
Demonstration of a self-mixing displacement sensor based on terahertz quantum cascade lasers journal August 2011
Intracavity laser absorption spectroscopy using mid-IR quantum cascade laser conference May 2011
Intracavity sensing via compliance voltage in an external cavity quantum cascade laser journal January 2012
Wavelength stabilized laser sources using feedback from volume holograms patent November 1997
Discrete wavelength liquid crystal tuned external cavity diode laser patent March 2001
Optical transmitter comprising a stepwise tunable laser patent August 2003

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