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Quasi-static optical parametric amplification
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DOI：10.1364/OPTICA.442550.png)
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High-gain optical parametric amplification is an important nonlinear process used both as a source of coherent infrared light and as a source of nonclassical light. In this work, we experimentally demonstrate an approach to optical parametric amplification that enables extremely large parametric gains with low energy requirements. In conventional nonlinear media driven by femtosecond pulses, multiple dispersion orders limit the effective interaction length available for parametric amplification. Here, we use the dispersion engineering available in periodically poled thin-film lithium niobate nanowaveguides to eliminate several dispersion orders at once. The result is a quasi-static process; the large peak intensity associated with a short pump pulse can provide gain to signal photons without undergoing pulse d istortion or temporal walk-off. We characterize the parametric gain available in these waveguides using optical parametric generation, where vacuum fluctuations are amplified to macroscopic intensities. In the unsaturated regime, we observe parametric gains as large as 71 dB (118 dB/cm) spanning 1700-2700 nm with pump energies of only 4 pJ. When driven with pulse energies >10 pJ , we observe saturated parametric gains as large as 88 dB ( >146 dB/cm). The devices shown here achieve saturated optical parametric generation with orders of magnitude less pulse energy than previous techniques. (C) 2022 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Keyword:
FILM LITHIUM-NIOBATE
HIGH-REPETITION-RATE
HIGH-POWER
CONVERSION EFFICIENCY
NONLINEAR OPTICS
WAVE-GUIDES
HIGH-ENERGY
GENERATION
PICOSECOND
THRESHOLD
期刊
IF:
8.5
论文数:
2.4K
被引数:
2.1W
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引用论文
Continuous-wave 6-dB-squeezed light with 2.5-THz-bandwidth from single-mode PPLN waveguide.png)
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