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Efficient parametric amplification via simultaneous second harmonic generation
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DOI：10.1364/OE.437864.png)
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Abstract
En 中文
We introduce a concept for efficient optical parametric amplification (OPA) based on simultaneously phase-matched idler second harmonic generation (SHG), which together exhibits the dynamical behavior of parametric amplification but with damped conversion-back-conversion cycles. This enables amplification efficiency exceeding that of conventional OPA by several-fold for femtosecond and picosecond signal pulses with bell-shaped intensity profiles by allowing a near-uniform spatiotemporal depletion of the pump wave. We develop a Duffing oscillator model that unifies the description of conventional OPA and amplification accompanied by idler photon displacement by either linear absorption or SHG. A spatiotemporal analysis of devices based on birefringent or superlattice quasi-phase matching in common bulk media predicts energy conversion up to 55%. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Keywords:
BROAD-BAND
FREQUENCY-CONVERSION
PHASE
PULSES
ULTRABROADBAND
OSCILLATION
AMPLIFIER
DESIGN
CDSIP2