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Noise characteristics of single shot broadband Raman-resonant CARS with single- and multimode lasers

Kröll, Stefan LU ; Aldén, Marcus LU ; Berglind, T and Hall, R. J (1987) In Applied Optics 26(6). p.1068-1073
Abstract
A simple model is presented as an aid in understanding, first, the relative noise performance and, second, the noise reduction achievable by referencing, in different experimental approaches to single shot broadband coherent anti-Stokes Raman scattering (CARS). Qualitative agreement is obtained with previous experimental investigations of CARS noise. The broadband dye laser radiation is described as the sum of independent modes with random phases. The dye laser contribution to the CARS noise is then approximately inversely proportional to the square root of the number of dye laser modes generating the detected signal. A fundamental idea is that in Raman resonant spectra only the number of Stokes modes actually participating in driving the... (More)
A simple model is presented as an aid in understanding, first, the relative noise performance and, second, the noise reduction achievable by referencing, in different experimental approaches to single shot broadband coherent anti-Stokes Raman scattering (CARS). Qualitative agreement is obtained with previous experimental investigations of CARS noise. The broadband dye laser radiation is described as the sum of independent modes with random phases. The dye laser contribution to the CARS noise is then approximately inversely proportional to the square root of the number of dye laser modes generating the detected signal. A fundamental idea is that in Raman resonant spectra only the number of Stokes modes actually participating in driving the Raman resonance should be counted. This means, e.g., that for narrow Raman resonances, as in an atmospheric flame, the noise generated by the dye laser will be higher for a single-mode pump laser than for a multimode pump laser with the experimental CARS configuration normally employed. The implications of the model for the dual broadband type CARS techniques are also discussed. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Optics
volume
26
issue
6
pages
1068 - 1073
publisher
OSA
external identifiers
  • scopus:84975568531
ISSN
2155-3165
DOI
10.1364/AO.26.001068
language
English
LU publication?
yes
id
40afc358-7576-4db3-a444-02ecda212d92 (old id 2258625)
date added to LUP
2012-02-13 23:37:19
date last changed
2017-09-17 08:54:13
@article{40afc358-7576-4db3-a444-02ecda212d92,
  abstract     = {A simple model is presented as an aid in understanding, first, the relative noise performance and, second, the noise reduction achievable by referencing, in different experimental approaches to single shot broadband coherent anti-Stokes Raman scattering (CARS). Qualitative agreement is obtained with previous experimental investigations of CARS noise. The broadband dye laser radiation is described as the sum of independent modes with random phases. The dye laser contribution to the CARS noise is then approximately inversely proportional to the square root of the number of dye laser modes generating the detected signal. A fundamental idea is that in Raman resonant spectra only the number of Stokes modes actually participating in driving the Raman resonance should be counted. This means, e.g., that for narrow Raman resonances, as in an atmospheric flame, the noise generated by the dye laser will be higher for a single-mode pump laser than for a multimode pump laser with the experimental CARS configuration normally employed. The implications of the model for the dual broadband type CARS techniques are also discussed.},
  author       = {Kröll, Stefan and Aldén, Marcus and Berglind, T and Hall, R. J},
  issn         = {2155-3165},
  language     = {eng},
  number       = {6},
  pages        = {1068--1073},
  publisher    = {OSA},
  series       = {Applied Optics},
  title        = {Noise characteristics of single shot broadband Raman-resonant CARS with single- and multimode lasers},
  url          = {http://dx.doi.org/10.1364/AO.26.001068},
  volume       = {26},
  year         = {1987},
}