Abstract

We report what is to our knowledge the first experimental demonstration of spectral shearing interferometry by use of an electro-optic temporal phase modulator to generate the spectral shear. This approach achieves far better sensitivity than nonlinear optical pulse characterization techniques, including other versions of spectral shearing interferometry. Temporal phase modulation is conceptually simple and is implemented easily with telecommunication components. The technique is versatile, and a wide range of pulse durations can be measured with minimal changes in the setup. We demonstrate the accurate characterization of a 156-MHz train of 1540-nm pulses with durations ranging from 750 fs to more than 30 ps after various amounts of chirping, at average powers below 1 µW.

© 2003 Optical Society of America

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References

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[CrossRef]

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Cheriaux, G.

Chu, K.

de Beauvoir, B.

Dorrer, C.

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[CrossRef]

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D. G. Moodie, A. D. Ellis, and C. W. Ford, Electron. Lett. 30, 1700 (1994).
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Grant, R.

Heritage, J.

Iaconis, C.

Ishibashi, S.

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Joffre, M.

Keller, U.

Kuznetsova, T. I.

V. A. Zubov and T. I. Kuznetsova, Sov. J. Quantum Electron. 21, 1285 (1991).
[CrossRef]

Le Blanc, C.

Lepetit, L.

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Moodie, D. G.

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Naganuma, K.

K. Naganuma and S. Ishibashi, in Ultrafast Phenomena, Vol. 43 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2000), paper MF7.

Ranc, S.

Rousseau, J. P.

Rousseau, P.

Steinmeyer, G.

Sutter, D. H.

Walmsley, I.

Walmsley, I. A.

White, W.

Wong, V.

Zubov, V. A.

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Figures (4)

Fig. 1
Fig. 1

Setup for electro-optic spectral shearing interferometry. Two replicas of the pulse under test are generated by an interferometer (Int.) and temporally modulated by a phase modulator (Ph. Mod.). The interferogram of the modulated replicas is measured by an optical spectrum analyzer (O.S.A.).

Fig. 2
Fig. 2

(a) Spectral intensity (solid curve) and phase (dashed curve) of the initial pulse, and the pulse after 23 m (squares) and after 43 m (triangles) of standard single-mode fiber. (b) Extracted (circles) and simulated (solid curve) second-order dispersion for linear propagation in various lengths of fiber.

Fig. 3
Fig. 3

Temporal intensity before (dashed curve) and after (solid curve) propagation in the two-grating compressor.

Fig. 4
Fig. 4

Spectral phase measured at average powers of 2 mW, 10 µW, and 270 nW.

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