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Monolithic optical parametric oscillator using chirped quasi-phase matching

机译:利用chi准相位匹配的单片光学参量振荡器

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摘要

We describe a highly efficient monolithic, Q-switched, nanosecond optical parametric oscillator based on amagnesium-oxide-doped periodically poled lithium niobate crystal and containing multiple quasi-phase-matched gratings. The crystal consisted of a single unchirped grating and five gratings containing progressively increasing amounts of longitudinal chirp. The monolithic design makes the device highly compact, stable, and robust, and it demonstrated a pump-to-signal conversion efficiency of around 50percent, generating 50 (mu)J pulses at 1.55 (mu)m with a spectral bandwidth of 20 nm. Sonogram traces are presented showing the effect of crystal chirp on the temporal and spectral performance.
机译:我们描述了一种高效的单片,Q开关,纳秒级光学参量振荡器,它基于氧化镁掺杂的周期性极化铌酸锂晶体,并包含多个准相位匹配光栅。晶体由单个未打磨的光栅和五个包含逐渐增加的纵向rp声的光栅组成。单片设计使该器件高度紧凑,稳定且坚固,并且显示出约50%的泵到信号转换效率,可在1.55μm处产生50μJ脉冲,并具有20 nm的光谱带宽。呈现了超声图,显示了晶体chi对时间和光谱性能的影响。

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