Tunable light source for use in photoacoustic spectrometers

Title: Tunable light source for use in photoacoustic spectrometers

Full Record
Other Related Research

Abstract

The present invention provides a photoacoustic spectrometer that is field portable and capable of speciating complex organic molecules in the gas phase. The spectrometer has a tunable light source that has the ability to resolve the fine structure of these molecules over a large wavelength range. The inventive light source includes an optical parametric oscillator (OPO) having combined fine and coarse tuning. By pumping the OPO with the output from a doped-fiber optical amplifier pumped by a diode seed laser, the inventive spectrometer is able to speciate mixtures having parts per billion of organic compounds, with a light source that has a high efficiency and small size, allowing for portability. In an alternative embodiment, the spectrometer is scanned by controlling the laser wavelength, thus resulting in an even more compact and efficient design.

Inventors:: Bisson, Scott E.; Kulp, Thomas J.; Armstrong, Karla M.

Publication Date:: 2005-12-13

Research Org.:: Sandia National Lab. (SNL-CA), Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1175584

Patent Number(s):: 6,975,402

Application Number:: 10/300,421

Assignee:: Sandia National Laboratories

DOE Contract Number:: AC04-94AL85000

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION

Citation Formats


                    Bisson, Scott E., Kulp, Thomas J., and Armstrong, Karla M. Tunable light source for use in photoacoustic spectrometers.  United States: N. p., 2005. 
        Web.

Copy to clipboard


                    Bisson, Scott E., Kulp, Thomas J., & Armstrong, Karla M. Tunable light source for use in photoacoustic spectrometers.  United States.

Copy to clipboard


                    Bisson, Scott E., Kulp, Thomas J., and Armstrong, Karla M. Tue .  
        "Tunable light source for use in photoacoustic spectrometers".  United States.  https://www.osti.gov/servlets/purl/1175584.

Copy to clipboard


                    
@article{osti_1175584,

  title        = {Tunable light source for use in photoacoustic spectrometers},

  author       = {Bisson, Scott E. and Kulp, Thomas J. and Armstrong, Karla M.},

  abstractNote = {The present invention provides a photoacoustic spectrometer that is field portable and capable of speciating complex organic molecules in the gas phase. The spectrometer has a tunable light source that has the ability to resolve the fine structure of these molecules over a large wavelength range. The inventive light source includes an optical parametric oscillator (OPO) having combined fine and coarse tuning. By pumping the OPO with the output from a doped-fiber optical amplifier pumped by a diode seed laser, the inventive spectrometer is able to speciate mixtures having parts per billion of organic compounds, with a light source that has a high efficiency and small size, allowing for portability. In an alternative embodiment, the spectrometer is scanned by controlling the laser wavelength, thus resulting in an even more compact and efficient design.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/1175584},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2005},

  month        = {12}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

High sensitivity photoacoustic spectrometer for variable temperature solution studies

Journal Article Beitz, J V ; Doxtader, M M ; Maroni, V A ; ... - Review of Scientific Instruments; (USA)

A single beam, dual cell, photoacoustic spectrometer has been developed for use with solutions from ambient temperature to the boiling point of the liquid. The optical absorbance sensitivity of the apparatus is 3{times}10{sup {minus}7} absorbance units per cm (base 10 logarithm, 1000 pulse average, 13 mJ/pulse) for solutes in aqueous solution at 90 {degree}C, using an excimer-pumped dye laser as the light source. The cell assembly is designed to thermally isolate the acoustic detector and prevent evaporative loss of the solvent. High accuracy subtraction of solvent optical absorption is achieved using preamplifiers with continuously variable gain, matched electrical bandpass filters,more »« less
https://doi.org/10.1063/1.1141195
Efficient all-solid-state UV lidar sources : from 100's of millijoules to 100's of microjoules.

Conference Armstrong, Darrell Jewell ; Smith, Arlee Virgil

Sandia National Laboratories has developed high-energy all-solid-state UV sources for use in laboratory tests of the feasibility of satellite-based ozone DIAL. These sources generate 320 nm light by sum-frequency mixing the 532 nm second harmonic of an Nd:YAG laser with the 803 nm signal light derived from a self-injection-seeded image-rotating optical parametric oscillator (OPO). The OPO cavity utilizes the RISTRA geometry, denoting rotated-image singly-resonant twisted rectangle. Two configurations were developed, one using extra-cavity sum-frequency mixing, where the sum-frequency-generation (SFG) crystal is outside the OPO cavity, and the other intra-cavity mixing, where the SFG crystal is placed inside the OPO cavity.more »« less
Highly efficient low-threshold tunable all-solid-state intracavity optical parametric oscillator in the mid infrared

Journal Article Lavi, R ; Englander, A ; Lallouz, R - Optics Letters

An intracavity critically phase-matched optical parametric oscillator (OPO) was demonstrated with a LiNbO{sub 3} crystal placed inside the resonator of a diode side-pumped {ital Q}-switched Nd:YAG laser. The OPO acted as a singly resonating cavity on the signal with a threshold below 10 MW/cm{sup 2}. Output energy as high as 640 {mu}J was observed at the idler wavelength of 3.7 {mu}m, which corresponds to a conversion efficiency of 1.8{percent} from diode light to idler light. Tunability over the wavelength range 3.3{endash}4.15 {mu}m was obtained by rotation of the LiNbO{sub 3} crystal. {copyright} {ital 1996 Optical Society of America.}
https://doi.org/10.1364/OL.21.000800
Efficient all solid-state UV source for satellite-based lidar applications.

Conference Armstrong, Darrell Jewell ; Smith, Arlee Virgil

A satellite-based UV-DIAL measurement system would allow continuous global monitoring of ozone concentration in the upper atmosphere. However such systems remain difficult to implement because aerosol-scattering return signals for satellite-based lidars are very weak. A suitable system must produce high-energy UV pulses at multiple wavelengths with very high efficiency. For example, a nanosecond system operating at 10 Hz must generate approximately 1 J per pulse at 308-320 nm. An efficient space-qualified wavelength-agile system based on a single UV source that can meet this requirement is probably not available using current laser technology. As an alternative, we're pursuing a multi-source approachmore »« less
New infrared solid state laser materials for CALIOPE

Conference DeLoach, L D ; Page, R H ; Wilke, G D

Tunable infrared laser light may serve as a useful means by which to detect the presence of the targeted effluents. Since optical parametric oscillators (OPOs) have proven to be a versatile method of generating coherent light from the ultraviolet to the mid-infrared, this technology is a promising choice by which to service the CALIOPE applications. In addition, since some uncertainty remains regarding the precise wavelengths and molecules that will be targeted, the deployment of OPOs retains the greatest amount of wavelength flexibility. Another approach that the authors are considering is that of generating tunable infrared radiation directly with a diode-pumpedmore »« less
Full Text Available

Similar Records