Abstract

We describe a femtosecond pulse shaper using a deformable membrane mirror. The pulses are measured with a real time second-harmonic-generation frequency-resolved optical gating system. Pulse shapes are modified according to a prescribed spectral phase. Accurate spectral phase design as well as pulse intensity modulation was achieved by using negative feedback mirror-surface control. Convergence to the chosen spectral phase design was typically achieved within several seconds.

© 2003 Optical Society of America

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References

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    [CrossRef]

Appl. Phys. B (1)

T. Brixner, A. Oehrlein, M. Strehle and G. Gerber, �??Feedback-controlled femtosecond pulse shaping�?? Appl. Phys. B 70: S119-S124 (2000).
[CrossRef]

IEEE J. Sel. Top. Quantum. Electron. (1)

D. J. Kane, �??Real-time measurement of ultrashort laser pulses using principal components generalized projections�?? IEEE J. Sel. Top. Quantum. Electron. 4, 278�??284 (1998).
[CrossRef]

IEEE JQE (1)

A. Weiner, �??Pulse shaping using LCD light modulators�?? IEEE JQE 28, 908 (1992).
[CrossRef]

J. Opt. Soc. Am. B (3)

Opt. Lett. (1)

Phys. Rev. A (1)

D. Zeidler, S. Frey, K. L. Kompa, M. Motzkus, �??Evolutionary algorithms and their application to optimal control studies�?? Phys. Rev. A 64, 023420 (2001).
[CrossRef]

Rev. Sci. Instrum. (2)

J. Garduño-Mejía, E. Ramsay, A. Greenaway and D.T Reid, �??Real time femtosecond optical pulse measurement using a video-rate frequency resolved optical gating system�?? Rev. Sci. Instrum. 74, 3624-3627 (2003).
[CrossRef]

R. Trebino, K. W. DeLong, D. N. Fittinghoff, J. N. Sweetser. M A. Krumbugel, B. A. Richman and D. J. Kane, �??Measuring ultrashort laser pulses in the time-frequency domain using frequency-resolved optical gating�?? Rev. Sci. Instrum. 68, 3277 (1997).
[CrossRef]

Other (1)

OKO Technologies, P.O. Box 2600 AN Delft, The Netherlands.

Supplementary Material (7)

» Media 1: AVI (1144 KB)     
» Media 2: AVI (579 KB)     
» Media 3: AVI (321 KB)     
» Media 4: AVI (1035 KB)     
» Media 5: AVI (942 KB)     
» Media 6: AVI (697 KB)     
» Media 7: AVI (819 KB)     

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Figures (11)

Fig. 1.
Fig. 1.

Schematic of the adaptive-optic femtosecond pulse shaper. DG: diffraction grating; CM: concave mirror; DM: deformable mirror; PC: personal computer

Fig. 2.
Fig. 2.

Video-rate SHG-FROG system

Fig. 3.
Fig. 3.

Flow chart illustrating the negative feedback pulse-shaping scheme

Fig. 4.
Fig. 4.

Image of the pulse-shaper interface windows

Fig. 5.
Fig. 5.

(1.14 MB) Movie of pulse compression: Before shaping the pulse incident on the pulse shaper was substantially chirped but after shaping to a flat target spectral phase the pulse was compressed.

Fig. 6.
Fig. 6.

(579 KB) Movie of near-quadratic spectral phase design: Shaping started from an arbitrary pulse with a small amount of spectral phase distortion and converged on a near-quadratic target phase.

Fig. 7.
Fig. 7.

(321 KB) Movie of nonlinearly chirped pulse design: The target spectral phase had a near-sinusoidal form corresponding to a double pulse.

Fig. 8.
Fig. 8.

(1.035 MB) Movie of near-cubic spectral phase design: the target phase had an approximately cubic form that led to an asymmetrical temporal profile with one extended edge.

Fig. 9.
Fig. 9.

(942 KB) Movie of pulse compression at small resolution: Shaping began with a shorter pulse than used in Fig. 5 and the scales are adjusted to show higher spectral phase resolution. After shaping the spectral phase of the compressed pulse matched the target phase with a RMS difference of 4×10-5.

Fig. 10.
Fig. 10.

(697 KB) Movie of near-quadratic phase design at fine resolution: Shaping started with an arbitrary pulse and converged to a near-quadratic target phase profile with a variation of ~0.1 radians across the pulse bandwidth.

Fig. 11.
Fig. 11.

(819 KB) Movie of non-linear chirp design at a resolution of less than 0.1 rad: Shaping was started from a short arbitrary pulse and converged to a near-sinusoidal target profile. The shaped pulse was broadened by a small amount and showed extended wings.

Equations (1)

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Δ V ( ω ) = K Δ ϕ ( ω )

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