Competing collinear and noncollinear interactions in chirped quasi-phase-matched optical parametric amplifiers
نویسندگان
چکیده
Chirped quasi-phase-matched optical parametric amplifiers (chirped QPM OPAs) are investigated experimentally. The measured collinear gain is constant over a broad bandwidth, which makes these devices attractive candidates for use in femtosecond amplifier systems. The experiment also shows that chirped QPM OPAs support noncollinear gain-guided modes. These modes can dominate the desired collinear gain and generate intense parametric fluorescence. Design guidelines to mitigate these parasitic processes are discussed. © 2008 Optical Society of America OCIS codes: 140.4480, 190.4970, 190.4410, 190.7110, 320.1590, 320.5540.
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