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1 April 2022 High-energy, mid-IR, short-pulsed, hollow-core-fiber-feedback OPO
Yudi Wu, Sijing Liang, Qiang Fu, Thomas Bradley, Lin Xu, Francesco Poletti, David J. Richardson
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Proceedings Volume PC11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI; PC119850W (2022) https://doi.org/10.1117/12.2607864
Event: SPIE LASE, 2022, San Francisco, California, United States
Abstract
Realizing compact picosecond Optical Parametric Oscillators (OPOs) capable of generating high-energy mid-IR pulses at MHz repetition rates is a challenge due to the correspondingly long cavity length requirements. Intracavity fiber delay lines can be used to increase the cavity length but the achievable peak powers are then severely constrained by fiber nonlinearity. Here we report a compact, ytterbium-fiber-laser pumped, periodically poled lithium niobate based OPO that incorporates a 298 m length of hollow-core-fiber as an ultralow nonlinearity intracavity delay line. The OPO is capable of generating 1-MHz, 100-ps mid-IR pulses with an energy of 1.64-μJ and 12.8-kW peak power.
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Yudi Wu, Sijing Liang, Qiang Fu, Thomas Bradley, Lin Xu, Francesco Poletti, and David J. Richardson "High-energy, mid-IR, short-pulsed, hollow-core-fiber-feedback OPO", Proc. SPIE PC11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI, PC119850W (1 April 2022); https://doi.org/10.1117/12.2607864
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KEYWORDS
Optical parametric oscillators
Mid-IR
Picosecond phenomena
Materials processing
Mirrors
Reflectivity
Signal attenuation
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