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Soliton pulse compression in photonic band-gap fibers.

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Abstract

We report on pulse compression using a hollow-core photonic band-gap fiber filled with Xe. Output pulses with megawatt peak powers and durations of 50 fs have been generated from 120-fs input pulses. The large third-order dispersion inherent in these fibers degrades the optimal compression ratio and prevents generation of even shorter pulses. Nevertheless, for picosecond input pulses, compression to less than 100 fs is predicted.

©2005 Optical Society of America

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Figures (6)

Fig. 1.
Fig. 1. The experimental setup.
Fig. 2.
Fig. 2. (a) Measured autocorrelation traces as functions of pulse energy for a gas pressure of 4.5 atm, and (b) the autocorrelation width as a function of pulse energy.
Fig. 3.
Fig. 3. Input (blue line) and output (red line) autocorrelation traces (a) and (c), and spectra (b) and (d) for a pulse energy of 225 nJ at gas pressure of 4.5 atm and for a pulse energy of 315 nJ at 9 atm, respectively.
Fig. 4.
Fig. 4. Calculated (blue line) and measured (red line) autocorrelation (a) and spectrum (b) for a pulse with an energy of 225 nJ and for a gas pressure of 4.5 atm in the fiber. The black line in (b) is spectral attenuation of the fiber. The rise of the experimental spectrum at 1700 nm is a feature of the background level of the spectrometer.
Fig. 5.
Fig. 5. Calculated output pulse intensity when only second-order dispersion is considered (red line) and when third-order dispersion is included (blue line).
Fig. 6.
Fig. 6. Calculated autocorrelation for an input pulse (blue) with temporal duration of 1 ps and pulse energy of 210 nJ and the calculated output pulse autocorrelation (red) after propagation over 6 meters of this fiber.

Equations (1)

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u ξ = n = 2 4 ( i ) n 1 L ds n ! L ds ( n ) n u τ n + i ( 1 + i ω 0 τ p τ ) p nl ,
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