Cross-phase-modulation-induced spectral effects in high-efficiency picosecond fiber optical parametric oscillators

Abstract

We explore the spectral effects due to cross-phase modulation and walk-off in picosecond fiber optical parametric oscillators. The output spectrum exhibits pump-power-dependent broadening, which can be quite asymmetric associated with a redshift or a blueshift depending on pump synchronization. By slightly increasing the cavity length, one obtains a blueshifted spectrum and a conversion efficiency as high as 15%.

High-energy dissipative soliton-driven fiber optical parametric oscillator emitting at 1.7 µm

“…The idler pulse energy predicted by our calculations is more than 1.3 nJ, which corresponds to conversion efficiencies higher than 20%. The idler spectrum (figure 2(c)) features a main peak along with strong modulations on its shorter wavelengths, which is attributed to the combined effects of cross-phase modulation and walk-off between the pump and idler [26]. It is worth noting that the signal spectrum features the mirror image of the idler with a much lower energy level [27,28].…”

Demonstration of nondegenerate spectrum reversal in optical-frequency regime

“…1(b) is based on fiber optical parametric oscillators (FOPOs) [12][13][14], which can be modeled as a single-pass fiber optical parametric process upon steady-state operation [13]. A Fabry-Perot cavity is formed between the Fresnel reflection from the front cleave of the photonic-crystal fiber and the end mirror.…”

“…The average pump power coupled into the fiber is 525 mW. In the picosecond case, the fiber is 1.2 m long with ZDW at 1061 nm [13].…”