Fiber optical parametric oscillator for coherent anti-Stokes Raman scattering microscopy

Erin S. Lamb, Simon Lefrancois, Minbiao Ji, William J. Wadsworth, X. Sunney Xie, Frank W. Wise

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We present a synchronously pumped fiber optical parametric oscillator for coherent anti-Stokes Raman scattering microscopy. Pulses from a 1 μm Yb-doped fiber laser are amplified and frequency converted to 779-808 nm through normal dispersion four-wave mixing in a photonic crystal fiber. The idler frequency is resonant in the oscillator cavity, and we find that bandpass filtering the feedback is essential for stable, narrow-bandwidth output. Experimental results agree quite well with numerical simulations of the device. Transform-limited 2 ps pulses with energy up to 4 nJ can be generated at the signal wavelength. The average power is 180 mW, and the relative-intensity noise is much lower than that of a similar parametric amplifier. High-quality coherent Raman images of mouse tissues recorded with this source are presented.
Original languageEnglish
Pages (from-to)4154-4157
Number of pages4
JournalOptics Letters
Issue number20
Publication statusPublished - 15 Oct 2013


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