High-efficiency hybridized parametric amplification (Conference Presentation)

Jeffrey Moses

doi:10.1117/12.2670447

8 June 2023 High-efficiency hybridized parametric amplification (Conference Presentation)

Jeffrey Moses

Proceedings Volume PC12577, High-power, High-energy Lasers and Ultrafast Optical Technologies; PC1257709 (2023) https://doi.org/10.1117/12.2670447
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

The efficiency of optical parametric amplification (OPA) is fundamentally limited by its cyclic evolution behavior, which creates inefficient, asynchronous spatiotemporal conversion due to the local dependence of the conversion cycle on the field intensity. For Gaussian beam and pulse shapes, the pump photon depletion efficiency is typically only 10-30%, with ~1-20% of the pump energy going to the signal, limiting research involving high power ultrafast lasers. Using a new approach of hybridized nonlinear parametric processes in an ordinary OPA crystal using birefringent phase matching, we have achieved a mid-infrared parametric amplifier with 44% pump-to-signal conversion efficiency and high single-stage gain of 48 dB, while using a Gaussian-like pump spatiotemporal intensity profile. Our method uses simultaneously phase matched OPA and second harmonic generation phase matched at the idler wavelength to enhance the signal conversion efficiency via suppressed back-conversion while preserving the idler energy in a coherent copropagating field at twice its frequency. This “hybridized parametric amplification (HPA)” approach is a promising high-efficiency alternative to ordinary OPA. I will summarize an experimental demonstration of the amplifier [arXiv:2207.04147 [physics.optics]], and a theoretical explanation and an experimental verification of the wave evolution dynamics [Opt. Express 29, 30590 (2021); Phys. Rev. Lett. 129, 153901 (2022)].

Conference Presentation

Citation Download Citation

Jeffrey Moses "High-efficiency hybridized parametric amplification (Conference Presentation)", Proc. SPIE PC12577, High-power, High-energy Lasers and Ultrafast Optical Technologies, PC1257709 (8 June 2023); https://doi.org/10.1117/12.2670447

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KEYWORDS

Optical parametric amplifiers

Second harmonic generation

Energy efficiency

Nonlinear crystals

Oscillators

Phase matching

Physical coherence

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