Temporal Simultons in Optical Parametric Oscillators

Abstract

We identify and demonstrate a regime of operation in optical parametric oscillators (OPOs) in which the formation of temporal simultons produces stable half-harmonic pulses. Simultons are simultanous bright-dark solitons of a signal field at frequency $\omega$ and the pump field at $2\omega$ which form in a quadratic nonlinear medium. The formation of simultons in an OPO is evidenced by sech${}^2$ spectra with broad instantaneous bandwidths which increase with pump power, and large slope efficiencies. In contrast to conventional synchronously pumped OPOs, operation in this regime is achieved by using relatively large parametric gains, and a low finesse resonator detuned to a slightly longer roundtrip time than the pump repetition period. In the experiment we achieve sub-50 fs sech${}^2$ pulses with a slope efficiency of 570%, and a conversion efficiency of 55% as a result of formation of simultons in an OPO. We verify the distinct features of OPO operation in the simulton regime analytically and numerically. These results represent a fundamental shift in the understanding and design of OPOs, in which the nonlinear dynamics that arise during asynchronous operation can be used to efficiently generate few-cycle long-wavelength frequency combs.

arXiv comment5 Pages, 3 Figures

References in corpus (8)

• Temporal solitons in optical microresonators
• Mid-infrared frequency combs
• Microresonator solitons for massively parallel coherent optical communications
• Photonic chip based optical frequency comb using soliton induced Cherenkov radiation
• Silicon-Chip Mid-Infrared Frequency Comb Generation
• Walk-off-induced modulation instability, temporal pattern formation, and frequency comb generation in cavity-enhanced second-harmonic generation
• Reduced models and design principles for half-harmonic generation in synchronously-pumped optical parametric oscillators
• Single envelope equation modelling of multi-octave comb arrays in microresonators with quadratic and cubic nonlinearity

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