1-mJ, sub-5-fs carrier-envelope phase-locked pulses

Abstract : We report the routine generation of sub-5-fs laser pulses with 1-mJ energy and stable carrier-envelope phase at 1-kHz repetition rate, obtained by compressing the multi-mJ output from a phase-locked Ti:sapphire amplifier in a rare-gas-filled hollow fiber. The dual-stage amplifier features a hybrid transmission grating/chirped mirror compressor providing 2.2-mJ, 26-fs pulses at 1 kHz with standard phase deviation of 190 mrad rms. We demonstrate hour-long phase stability without feedback control of grating position or rigorous control of the laser environment, simply by using small pulse stretching factors in the amplifier, which minimize the beam pathway in the compressor. The amplifier also integrates a versatile AOPDF (acousto-optic programmable dispersive filter) for closed-loop spectral phase optimization. The various factors influencing the overall phase stability of the system are discussed in detail. Using the optimized output, 1-mJ, 4.5-fs pulses are generated by seeding the neon gas filled hollow fiber with a circularly polarized input beam. A standard phase deviation of 230 mrad after the HCF is obtained by direct f-to-2f detection and slow-loop feedback to the oscillator locking electronics without any additional spectral broadening.
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Submitted on : Thursday, October 21, 2010 - 10:24:19 AM
Last modification on : Thursday, December 5, 2019 - 6:50:05 PM

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Xiaowei Chen, L. Canova, Arnaud Malvache, Aurélie Jullien, Rodrigo B. Lopez-Martens, et al.. 1-mJ, sub-5-fs carrier-envelope phase-locked pulses. Applied Physics B - Laser and Optics, Springer Verlag, 2010, 99 (1-2), pp.149-157. ⟨10.1007/s00340-009-3835-y⟩. ⟨hal-00528160⟩

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