Abstract

We demonstrate an approach to coherent anti-Stokes Raman scattering (CARS) spectroscopy/microscopy based on spectral compression of femtosecond pulses emitted by a compact Er-fiber oscillator. Spectral compression is achieved by group-velocity mismatched second-harmonic generation in periodically poled nonlinear crystals, and it allows efficient synthesis of synchronized narrow-bandwidth (less than 10cm1) pump and Stokes pulses with the frequency difference continuously tunable up to 3000cm1. CARS signal enhancement by up to 3 orders of magnitude is obtained by interferometric superposition with a phase-coherent local oscillator field, also synthesized by spectral compression.

© 2009 Optical Society of America

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2009

2008

Ch. W. Freudiger, W. Min, B. G. Saar, S. Lu, G. R. Holtom, C. He, J. C. Tsai, J. X. Kang, and X. S. Xie, Science 322, 1857 (2008).
[CrossRef] [PubMed]

C. L. Evans and X. S. Xie, Annu. Rev. Anal. Chem. 1, 883 (2008).
[CrossRef]

2007

2006

2004

2002

Adler, F.

Baronio, F.

Brida, D.

Buckup, T.

Capobianco, A. D.

Carrasco, S.

Cerullo, G.

Cheng, J.-X.

Cho, H.

Cirmi, G.

Conforti, M.

De Angelis, C.

Evans, C. L.

Freudiger, Ch. W.

Ch. W. Freudiger, W. Min, B. G. Saar, S. Lu, G. R. Holtom, C. He, J. C. Tsai, J. X. Kang, and X. S. Xie, Science 322, 1857 (2008).
[CrossRef] [PubMed]

Ganikhanov, F.

He, C.

Ch. W. Freudiger, W. Min, B. G. Saar, S. Lu, G. R. Holtom, C. He, J. C. Tsai, J. X. Kang, and X. S. Xie, Science 322, 1857 (2008).
[CrossRef] [PubMed]

Holtom, G. R.

Ch. W. Freudiger, W. Min, B. G. Saar, S. Lu, G. R. Holtom, C. He, J. C. Tsai, J. X. Kang, and X. S. Xie, Science 322, 1857 (2008).
[CrossRef] [PubMed]

Jones, D. J.

Jurna, M.

Kang, J. X.

Ch. W. Freudiger, W. Min, B. G. Saar, S. Lu, G. R. Holtom, C. He, J. C. Tsai, J. X. Kang, and X. S. Xie, Science 322, 1857 (2008).
[CrossRef] [PubMed]

Katz, M.

Kopf, D.

Korterik, J. P.

Lee, D.-H.

Leitenstorfer, A.

Lu, S.

Ch. W. Freudiger, W. Min, B. G. Saar, S. Lu, G. R. Holtom, C. He, J. C. Tsai, J. X. Kang, and X. S. Xie, Science 322, 1857 (2008).
[CrossRef] [PubMed]

Manzoni, C.

Marangoni, M.

Marangoni, M. A.

Min, W.

Ch. W. Freudiger, W. Min, B. G. Saar, S. Lu, G. R. Holtom, C. He, J. C. Tsai, J. X. Kang, and X. S. Xie, Science 322, 1857 (2008).
[CrossRef] [PubMed]

Motzkus, M.

Moutzouris, K.

Nalesso, G. F.

Offerhaus, H. L.

Otto, C.

Pigozzo, F. M.

Potma, E. O.

Quintavalle, M.

Ramponi, R.

Saar, B. G.

Ch. W. Freudiger, W. Min, B. G. Saar, S. Lu, G. R. Holtom, C. He, J. C. Tsai, J. X. Kang, and X. S. Xie, Science 322, 1857 (2008).
[CrossRef] [PubMed]

F. Ganikhanov, C. L. Evans, B. G. Saar, and X. S. Xie, Opt. Lett. 31, 1872 (2006).
[CrossRef] [PubMed]

Seitz, W.

Sotier, F.

Tauser, F.

Träutlein, D.

Tsai, J. C.

Ch. W. Freudiger, W. Min, B. G. Saar, S. Lu, G. R. Holtom, C. He, J. C. Tsai, J. X. Kang, and X. S. Xie, Science 322, 1857 (2008).
[CrossRef] [PubMed]

von Vacano, B.

Xie, X. S.

Ye, J.

Yoo, Y. S.

Annu. Rev. Anal. Chem.

C. L. Evans and X. S. Xie, Annu. Rev. Anal. Chem. 1, 883 (2008).
[CrossRef]

Opt. Express

Opt. Lett.

Science

Ch. W. Freudiger, W. Min, B. G. Saar, S. Lu, G. R. Holtom, C. He, J. C. Tsai, J. X. Kang, and X. S. Xie, Science 322, 1857 (2008).
[CrossRef] [PubMed]

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Figures (4)

Fig. 1
Fig. 1

Experimental setup for fiber-format CARS. DBS, dichroic beam splitter; F1, bandpass filter; F2, short/bandpass filters; PP, periodically poled crystals; SC, supercontinuum; PD, photodetector.

Fig. 2
Fig. 2

(a) Compressed SH spectra (solid curves, bottom scale) and corresponding FF spectra (dashed curves, top scale). The Stokes pulses separated by 100 cm 1 are simultaneously synthesized by splitting the SC in two parts for application to FM-CARS.

Fig. 3
Fig. 3

CARS signal as a function of the frequency detuning between pump and Stokes for a solution of DMSO.

Fig. 4
Fig. 4

(a) Interference pattern between CARS and LO as a function of their delay. (b) Modulation amplitude ( Δ V ) as a function of LO power: experimental points (dots) and power-law fitting curve (lines).

Equations (1)

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P = P CARS + P LO + 2 P CARS P LO cos Δ ϕ ,

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