Optical heterodyne detection for cavity ring-down spectroscopy
Abstract
A cavity ring-down system for performing cavity ring-down spectroscopy (CRDS) using optical heterodyne detection of a ring-down wave E.sub.RD during a ring-down phase or a ring-up wave E.sub.RU during a ring up phase. The system sends a local oscillator wave E.sub.LO and a signal wave E.sub.SIGNAL to the cavity, preferably a ring resonator, and derives an interference signal from the combined local oscillator wave E.sub.LO and the ring-down wave E.sub.RD (or ring-up wave E.sub.RU). The local oscillator wave E.sub.LO has a first polarization and the ring-down wave E.sub.RD has a second polarization different from the first polarization. The system has a combining arrangement for combining or overlapping local oscillator wave E.sub.LO and the ring-down wave E.sub.RD at a photodetector, which receives the interference signal and generates a heterodyne current I.sub.H therefrom. Frequency and phase differences between the waves are adjustable.
- Inventors:
-
- Saratoga, CA
- Mountain View, CA
- Stanford, CA
- Issue Date:
- Research Org.:
- Stanford Univ., CA (United States)
- OSTI Identifier:
- 873117
- Patent Number(s):
- 6094267
- Application Number:
- 09/295,213
- Assignee:
- Board of Trustees of Leland Stanford Jr. University (Palo Alto, CA)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- DOE Contract Number:
- FG03-92ER14304
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- optical; heterodyne; detection; cavity; ring-down; spectroscopy; performing; crds; wave; phase; ring-up; ru; sends; local; oscillator; signal; preferably; resonator; derives; interference; combined; polarization; combining; arrangement; overlapping; photodetector; receives; generates; current; therefrom; frequency; differences; waves; adjustable; cavity ring-down; ring-down spectroscopy; phase difference; local oscillator; phase differences; optical heterodyne; heterodyne detection; ring-down phase; interference signal; signal wave; /356/
Citation Formats
Levenson, Marc D, Paldus, Barbara A, and Zare, Richard N. Optical heterodyne detection for cavity ring-down spectroscopy. United States: N. p., 2000.
Web.
Levenson, Marc D, Paldus, Barbara A, & Zare, Richard N. Optical heterodyne detection for cavity ring-down spectroscopy. United States.
Levenson, Marc D, Paldus, Barbara A, and Zare, Richard N. Sat .
"Optical heterodyne detection for cavity ring-down spectroscopy". United States. https://www.osti.gov/servlets/purl/873117.
@article{osti_873117,
title = {Optical heterodyne detection for cavity ring-down spectroscopy},
author = {Levenson, Marc D and Paldus, Barbara A and Zare, Richard N},
abstractNote = {A cavity ring-down system for performing cavity ring-down spectroscopy (CRDS) using optical heterodyne detection of a ring-down wave E.sub.RD during a ring-down phase or a ring-up wave E.sub.RU during a ring up phase. The system sends a local oscillator wave E.sub.LO and a signal wave E.sub.SIGNAL to the cavity, preferably a ring resonator, and derives an interference signal from the combined local oscillator wave E.sub.LO and the ring-down wave E.sub.RD (or ring-up wave E.sub.RU). The local oscillator wave E.sub.LO has a first polarization and the ring-down wave E.sub.RD has a second polarization different from the first polarization. The system has a combining arrangement for combining or overlapping local oscillator wave E.sub.LO and the ring-down wave E.sub.RD at a photodetector, which receives the interference signal and generates a heterodyne current I.sub.H therefrom. Frequency and phase differences between the waves are adjustable.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2000},
month = {Sat Jan 01 00:00:00 EST 2000}
}
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