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Design of efficient single stage chirped pulse difference frequency generation at 7 m driven by a dual wavelength Ti:sapphire laser
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Design of efficient single stage chirped pulse difference frequency generation at 7 m driven by a dual wavelength Ti:sapphire laser
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Paper
Design of efficient single stage chirped pulse difference frequency generation at 7 m driven by a dual wavelength Ti:sapphire laser
2013
Overview
We present a design for a high-energy single stage mid-IR difference frequency generation adapted to a two-color Ti:sapphire amplifier system. The optimized mixing process is based on chirped pulse difference frequency generation (CP-DFG), allowing for a higher conversion efficiency, larger bandwidth and reduced two photon absorption losses. The numerical start-to-end simulations include stretching, chirped pulse difference frequency generation and pulse compression. Realistic design parameters for commercially available non linear crystals (GaSe, AgGaS2, LiInSe2, LiGaSe2) are considered. Compared to conventional un-chirped DFG directly pumped by Ti:sapphire technology we report a threefold increase of the quantum efficiency. Our CP-DFG scheme provides up to 340 J pulse energy directly at 7.2 m when pumped with 3 mJ and supports a bandwidth of up to 350 nm. The resulting 240 fs mid-IR pulses are inherently phase stable.
Publisher
Cornell University Library, arXiv.org
