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Title: Spectroscopy using active diode laser stabilization by optical feedback

Abstract

A cavity ring down spectroscopy (CRDS) system uses a free-running continuous wave (c.w.) diode laser stabilized by frequency-shifted optical feedback in the presence of strong reflections from a high-finesse Fabry-Perot resonator. The frequency-shifted feedback stabilization eliminates the need for tightly controlling the relative positions of the laser and resonator. Non-frequency-shifted feedback is used for linewidth broadening. An acousto-optic modulator placed between the diode laser output and the resonator input frequency-shifts light reflected by the resonator input, causing the laser to cycle in phase with a period equal to the inverse of the frequency-shift. The laser diode linewidth can be stabilized from several MHz for high resolution spectroscopy of species at low pressures, to several hundred MHz for lower resolution spectroscopy of species at atmospheric pressures.

Inventors:
; ;
Issue Date:
Research Org.:
Leland Stanford Junior Univ., Stanford, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1531823
Patent Number(s):
5903358
Application Number:
08/949,241
Assignee:
The Board of Trustees of the Leland Stanford Junior University (Stanford, CA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G - PHYSICS G01 - MEASURING G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
DOE Contract Number:  
FG03-92ER14304; N00014-92-J-1903
Resource Type:
Patent
Resource Relation:
Patent File Date: 1997-10-10
Country of Publication:
United States
Language:
English

Citation Formats

Zare, Richard N., Martin, Juergen, and Paldus, Barbara A. Spectroscopy using active diode laser stabilization by optical feedback. United States: N. p., 1999. Web.
Zare, Richard N., Martin, Juergen, & Paldus, Barbara A. Spectroscopy using active diode laser stabilization by optical feedback. United States.
Zare, Richard N., Martin, Juergen, and Paldus, Barbara A. Tue . "Spectroscopy using active diode laser stabilization by optical feedback". United States. https://www.osti.gov/servlets/purl/1531823.
@article{osti_1531823,
title = {Spectroscopy using active diode laser stabilization by optical feedback},
author = {Zare, Richard N. and Martin, Juergen and Paldus, Barbara A.},
abstractNote = {A cavity ring down spectroscopy (CRDS) system uses a free-running continuous wave (c.w.) diode laser stabilized by frequency-shifted optical feedback in the presence of strong reflections from a high-finesse Fabry-Perot resonator. The frequency-shifted feedback stabilization eliminates the need for tightly controlling the relative positions of the laser and resonator. Non-frequency-shifted feedback is used for linewidth broadening. An acousto-optic modulator placed between the diode laser output and the resonator input frequency-shifts light reflected by the resonator input, causing the laser to cycle in phase with a period equal to the inverse of the frequency-shift. The laser diode linewidth can be stabilized from several MHz for high resolution spectroscopy of species at low pressures, to several hundred MHz for lower resolution spectroscopy of species at atmospheric pressures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {5}
}

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