Literature DB >> 1840116

Frequency stabilisation of multimode helium-neon lasers in laser Doppler flowmetry.

H Deblén1, P A Oberg.   

Abstract

Low-frequency noise in laser Doppler recordings can be generated because of thermal instabilities in the gas laser cavity. Mode partition noise can be eliminated by thermal stabilisation of the laser cavity. The paper describes a method for closed loop temperature control of the laser cavity. The method uses orthogonal properties of longitudinal laser modes for the temperature control. The signal-to-noise ratio is considerably improved by the procedure. It is recommended that all gas laser equipped Doppler instruments used for precision blood flow studies should be equipped with stabilised laser sources.

Mesh：

Year:  1991        PMID： 1840116     DOI： 10.1007/bf02442316

Source DB:  PubMed          Journal:  Med Biol Eng Comput        ISSN： 0140-0118            Impact factor:   2.602


  9 in total

Review 1.  Laser-Doppler flowmetry.

Authors:  P A Oberg
Journal:  Crit Rev Biomed Eng       Date:  1990

2.  Frequency stabilization of internal-mirror helium-neon lasers.

Authors:  R Balhorn; H Kunzmann; F Lebowsky
Journal:  Appl Opt       Date:  1972-04-01       Impact factor: 1.980

3.  Reproducibility of helium-neon laser wavelengths at 633 nm.

Authors:  K D Mielenz; K F Nefflen; W R Rowley; D C Wilson; E Engelhard
Journal:  Appl Opt       Date:  1968-02-01       Impact factor: 1.980

4.  Modification of inexpensive multimode lasers to produce a stabilized single frequency beam.(1).

Authors:  S K Gordon; S F Jacobs
Journal:  Appl Opt       Date:  1974-02-01       Impact factor: 1.980

5.  Observations of a laser Doppler flowmeter output made using a calibration standard.

Authors:  S L Fairs
Journal:  Med Biol Eng Comput       Date:  1988-07       Impact factor: 2.602

6.  Investigation and improved performance of optical fibre probes in laser Doppler blood flow measurement.

Authors:  R J Gush; T A King
Journal:  Med Biol Eng Comput       Date:  1987-07       Impact factor: 2.602

7.  Rhythmical variations in human skin blood flow.

Authors:  E G Salerud; T Tenland; G E Nilsson; P A Oberg
Journal:  Int J Microcirc Clin Exp       Date:  1983

8.  A new instrument for continuous measurement of tissue blood flow by light beating spectroscopy.

Authors:  G E Nilsson; T Tenland; P A Obert
Journal:  IEEE Trans Biomed Eng       Date:  1980-01       Impact factor: 4.538

9.  An instrument to measure cutaneous blood flow using the Doppler shift of laser light.

Authors:  D Watkins; G A Holloway
Journal:  IEEE Trans Biomed Eng       Date:  1978-01       Impact factor: 4.538
  9 in total
  1 in total

1.  Laser speckle contrast imaging of the skin: interest in processing the perfusion data.

Authors:  Anne Humeau-Heurtier; Benjamin Buard; Guillaume Mahe; Pierre Abraham
Journal:  Med Biol Eng Comput       Date:  2011-12-29       Impact factor: 2.602
  1 in total

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