Green-Yellow-Orange-Red Spectral Range with Sum-Frequency Generation Using BIBO Crystal Pumped with an Optical Parametric Amplifier

Abstract

In this letter, we show the broadband sum-frequency generation (SFG) in the Green-Yellow-Orange-Red spectral range using bismuth triborate, BiB3O6 crystal (BIBO) as a nonlinear material. We perform a noncollinear phase-matching configuration within the BIBO crystal using the remaining light behind the second harmonic generation stage and the infrared idler of an optical parametric amplifier (OPA). The obtained mixing radiation of ultrafast light sources to generate femtosecond pulses across the 520.5 to 742.5 nm region is observed. The SFG spectrum from a single-pass cross-correlation intensity over such visible range is shown. The SFG wavelengths as a function of the tunable wavelength idler OPA agree with the expectations of the parametric conversion condition and open the door to practical multi-beam or multi-color sum-frequency generators.

High-Efficiency Second-Harmonic and Sum-Frequency Generation in a Silicon Nitride Microring Integrated with Few-Layer GaSe

“…7 More importantly, SiN is a flexible CMOScompatible material, which enables its PIC platform with rapid development and great potential in commercialization assisted by the open-access foundry processes. 8 For a sophisticated PIC platform, it is desirable to have the ability of implementing nonlinear optical effects, which could greatly enrich PIC functionalities, including all-optically controlled devices, 9 light source generations with new spectral ranges, 10 entangled photon generations, 11 and so forth. SiN PICs have been demonstrated as a decent platform to carry out third-order nonlinear optical effects, relying on their ultra-low nonlinear optical loss and moderately high third-order nonlinear susceptibility χ (3) .…”