Intracavity wavelength modulation of an optical parametric oscillator for coherent Raman microscopy | Zendy

Brian G. Saar | Zendy; Gary R. Holtom | Zendy; Christian W. Freudiger | Zendy; Chrisita Ackermann | Zendy; Winfield Hill | Zendy; Xiaohui Xie | Zendy

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Intracavity wavelength modulation of an optical parametric oscillator for coherent Raman microscopy

Author(s) -

Brian G. Saar,

Gary R. Holtom,

Christian W. Freudiger,

Chrisita Ackermann,

Winfield Hill,

Xiaohui Xie

Publication year - 2009

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.17.012532

Subject(s) - optics , optical parametric oscillator , raman scattering , picosecond , modulation (music) , raman spectroscopy , coherent anti stokes raman spectroscopy , materials science , laser , signal (programming language) , wavelength , frequency modulation , optical parametric amplifier , optoelectronics , physics , optical amplifier , telecommunications , computer science , radio frequency , acoustics , programming language

We present a novel intracavity frequency modulation scheme in a tunable, picosecond optical parametric oscillator (OPO). The OPO signal wavelength can be modulated with a depth of more than 10 nm at a rate of 38 MHz (one half its repetition rate). We discuss the design and construction of the light source and its application to the recently-developed frequency modulation coherent anti-Stokes Raman scattering (FM-CARS) and stimulated Raman scattering (SRS) techniques. The new light source allows for real time subtraction of the interfering background signal in coherent Raman imaging, yielding images with purely chemical contrast.

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