Numerical investigation of the energy limit in a picosecond fiber optic parametric oscillator

Abstract

Numerical simulation of a fiber optic parametric oscillator to produce picosecond narrowband pulses for coherent anti-Stokes Raman spectroscopy has been performed by an open source Python-based library using an extremely wide range of parameters, such as the pump pulse duration, parametric frequency shift, spectral bandwidth of the pump, and the parametric pulses. It required an extremely large calculation window, both in time and spectral domains. We managed to speed up the simulation 50 times using a graphic processor unit that allowed us to define the areas of stability for different lengths of standard passive (5–100 m) and photonic crystal (23–100 cm) fibers used in the external linear oscillator cavity. It was shown that highly chirped dissipative solitons at a wavelength about 800 nm can be generated with energy up to 55 nJ, which is limited by the pump depletion and self-phase modulation effects.

Parametric signal generation near 800 nm using a tunable fiber generator of dissipative solitons

“…Thus, in a 5-m-long PCF the generation of the supercontinuum was observed, which was shown earlier in the theoretical model, and in a 1-m-long PCF the peak power was not sufficient for parametric generation. Therefore, a numerical model was created which allowed to more accurately estimate the necessary parameters of the pulses delay and the parameters of the used components [6]. This work demonstrates the experimental result of optimization the experimental setup components forming the pump pulse for parametric generation, and the parametric generation itself.…”

Enhanced bi-LSTM for Modeling Nonlinear Amplification Dynamics of Ultra-Short Optical Pulses

“…We used the open-source Pyofss library [16] for numerical modeling; it has a newly added module that enables parallel computing with a Raman influence [17]. We also added our own modules for parallel amplification computing based on the Yb-coupled equations described above.…”

Numerical investigation of the fiber optic parametric oscillator scheme with a dual-arm synchronous pumping

“…In comparison with the previously performed large-scale numerical simulation [5] of a conventional FOPO with single-arm PCF, where the maximum energy of a parametric pulse at 33 cm PCF and 50 m of passive fiber was limited to 40 nJ, the scheme with two PCF arms allows to reach 180 nJ energy level with the same pumping. As can be seen in Fig.…”