Ultra-broad bandwidth parametric amplification at degeneracy

Optics Express (Impact Factor: 3.49). 10/2005; 13(19):7386-92. DOI: 10.1364/OPEX.13.007386
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We report on a novel approach of ultra-broad bandwidth parametric amplification around degeneracy. A bandwidth of up to 400 nm centered around 800 nm is amplified in a BBO crystal by using chirped pump pulses with a bandwitdth as broad as 10 nm. A supercontinuum signal is generated in a microstructured fiber, having to first order a quadratic chirp, which is necessary to ensure temporal overlap of the interacting waves over this broad bandwidth. Furthermore, we discuss the potential of this approach for an octave-spanning parametric amplification.

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Available from: Eric Cormier, Dec 28, 2013
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    • "In this case this approach allows for the parametric amplification of an octave spanning spectral width. The obtained estimation is in a good agreement with experimental results presented in [22]. We note, that chirped pump pulse can be used also to broaden a bandwidth of nondegenerate OPA [44], [45]. "
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    ABSTRACT: Optical parametric chirped pulse amplifiers (OPCPAs) are widely recognized and rapidly developing devices for high-power femtosecond pulse generation. In this paper we reveal the main issues of OPCPA gain bandwidth extension for amplification of pulses with octave-spanning spectra.
    IEEE Journal of Quantum Electronics 08/2010; 46(7-46):1031 - 1038. DOI:10.1109/JQE.2010.2042926 · 1.89 Impact Factor
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    • "Additionally, it has been shown that the pulses provided by such fiber chirped pulse amplifier systems (FCPA) are suitable for efficient pumping of ultrashort-pulseparametric amplifiers at MHz repetition rates [3] [4] [5] [6] [7]. The enormous amplification bandwidth of the OPA, especially in a non-collinear (NOPA) configuration [8] [8] or at degeneracy [10], enables the generation of ultrashort pulses. Furthermore, a high gain can be achieved in just few millimeter long crystals, and therefore, the B-integral (accumulated nonlinear phase) is typical negligible. "
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    ABSTRACT: We present a degenerated-parametric amplifier with gigawatt peak power operating at 1030 nm and 30 kHz repetition rate. Pulses of a fiber chirped pulse amplification (FCPA) system with 650 fs pulse duration and 1 mJ pulse energy are frequency doubled and used as pump source for a two stage optical parametric amplifier. Both the FCPA and the optical parametric amplifier (OPA) are seeded by the same YB:KGW oscillator. Spectral broadening of the OPA seed signal in a short-polarization-maintaining-step-index fiber creates enough bandwidth for sub 30 fs pulse generation, while temporal synchronization of pump and signal is realized by means of a multipass cell in the OPA signal beam path. Parametric amplification of the broadband signal takes place in two 1 mm BBO crystals. Pulse compression via chirped mirrors yields 81 muJ pulses as short as 29 fs. The corresponding pulse peak power is estimated to be as large as 2 GW. Together with the good beam quality (measured M2
    Proceedings of SPIE - The International Society for Optical Engineering 02/2009; DOI:10.1117/12.808761 · 0.20 Impact Factor
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