标题： 非简并光学参量振荡器中的超参数孤子 显示英文标题

标题： Hyperparametric solitons in nondegenerate optical parametric oscillators

摘要： 耗散孤子及其相关的低噪声、芯片级频率梳在光通信、光谱分析、精密时间保持等应用中具有巨大的潜力。 这些应用推动了将孤子频谱转移到远离电信C波段泵浦源的频率带的兴趣。 最近的演示利用二次谐波生成和简并光学参量振荡器（OPO）将孤子梳从主泵浦移开。 然而，这些方法缺乏非简并OPO提供的可调性。 本工作展示了基于硅氮化物微谐振器的非简并OPO系统中孤子的原理验证演示，该系统具有设计的色散和优化的耦合速率。 通过在C波段的一个相对低Q共振上进行泵浦，我们激发了一个以远偏移、高Q O波段共振为中心的信号孤子梳。 此过程还在泵浦和闲频频率处产生了重复率锁定的梳状光谱，后者发生在超过2$\mu$m的波长处。 我们证明了该平台支持的孤子与其他类型的耗散孤子不同，并称其为-超参数孤子。 当窄带信号模式在负泵浦失谐下相位匹配时，达到足够的功率以在参数信号中驱动双稳态时，就会出现这些孤子。 我们研究了超参数孤子的特性，包括其参数生成的背景和多孤子状态，既通过实验也通过理论建模。 显示英文摘要

摘要： Dissipative solitons and their associated low-noise, chip-scale frequency combs hold great potential for applications in optical communications, spectroscopy, precision time-keeping, and beyond. These applications drive interest in shifting soliton spectra to frequency bands far detuned from the telecom's C-band pump sources. Recent demonstrations have utilized second-harmonic generation and degenerate optical parametric oscillators (OPOs) to shift soliton combs away from the primary pump. However, these approaches lack the tunability offered by nondegenerate OPOs. This work presents a proof-of-principle demonstration of solitons in a silicon-nitride microresonator-based nondegenerate OPO system with engineered dispersion and optimized coupling rates. By pumping a relatively low-Q resonance in the C-band, we excite a signal soliton comb centred around a far-detuned, high-Q O-band resonance. This process also generates repetition-rate-locked combs at the pump and idler frequencies, with the latter occurring at a wavelength beyond 2$\mu$m. We demonstrate that the solitons supported by this platform are distinct from other families of dissipative solitons and call them - hyperparametric solitons. They emerge when the narrow-band signal mode, phase-matched under negative pump detuning, reaches sufficient power to drive bistability in the parametric signal. We investigate the properties of hyperparametric solitons, including their parametrically generated background and multisoliton states, both experimentally and through theoretical modelling.