Performance characterization of mid-infrared difference-frequency-generation in orientation-patterned gallium phosphide

Abstract

Abstract:We present a detailed characterization of the optical properties of the recently developed nonlinear material, orientation-patterned gallium phosphide (OP-GaP), by performing difference-frequency-generation experiments in the 2548-2782 nm wavelength range in the mid-infrared (mid-IR). Temperature and spectral acceptance bandwidth measurements have been performed to study the phase-matching characteristics of OP-GaP, and the dependence of nonlinear gain on the polarization of input incident fields has been investigated. The transmission of the OP-GaP crystal at the pump and signal wavelengths has been studied and found to be dependent on polarization as well as temperature. Further, we have observed a polarization-dependent spatial shift in the transmitted pump beam through the OP-GaP sample. We have also measured the damage threshold of the OP-GaP crystal to be 0.84 J/cm 2 at 1064 nm.

Continuous-Wave Second-Harmonic Generation in Orientation-Patterned Gallium Phosphide Waveguides at Telecom Wavelengths

“…All approaches rely on the fabrication of a seed layer, wherein the orientation-reversal pattern is defined. The first consists in using an OP-GaAs seed, − the fabrication of which is technologically mature. In the other two approaches the seed is fabricated using bulk GaP.…”

“…Nevertheless, efficient nonlinear conversion processes were only observed in bulk OP-GaP crystals grown by hydrid vapour phase epitaxy (HVPE) for free space quasi-phase matched conversion . To the best of our knowledge, the only result published on OP-GaP waveguides was based on Si orientation-reversed seeds with limited domain fidelity and dealt with parametric fluorescence. , …”

“…18 To the best of our knowledge, the only result published on OP-GaP waveguides was based on Si orientation-reversed seeds with limited domain fidelity and dealt with parametric fluorescence. 13,17 In the present contribution, an alternative approach to the fabrication of OP-GaP is proposed to produce crystals that are well-suited to the fabrication of shallow-ridge waveguides. Contrary to previous approaches, an OP-GaP seed is obtained by wafer bonding GaP membranes epitaxially grown on GaAs.…”

Singly-resonant pulsed optical parametric oscillator based on orientation-patterned gallium phosphide

“…Here, we use a repetition rate of 50 kHz resulting in a full-width at half-maximum (FWHM) pulse duration of ~13 ns, providing a modest peak power for parametric gain, while suppressing excess single-pass OPG in the oscillator. The pump beam propagates through a half-wave plate and a polarizing beamsplitter (PBS) for power attenuation, with a second half-wave plate providing polarization control for optimum nonlinear efficiency in the cubic OP-GaP crystal, according to our earlier polarization studies [18]. The OPO is formed by two plane mirrors with a minimum separation of 78 mm, resulting in a compact cavity limited in length by the physical dimension of the oven housing the OP-GaP crystal.…”

Feature issue introduction: Advanced Solid-State Lasers 2017

“…For higher Ho 3+ doping (5-10 at.%), the effect of upconversion and end-bulging of the disk enhances the thermo-optic aberrations leading to a deteriorated laser performance. J. Wei et al [12] present a detailed characterization of the optical properties of the recently developed nonlinear material, orientation-patterned gallium phosphide (OP-GaP), by performing difference-frequencygeneration experiments in the 2548-2782 nm wavelength range in the mid-infrared (mid-IR). Temperature and spectral acceptance bandwidth measurements have been performed to study the phase-matching characteristics of OP-GaP, and the dependence of nonlinear gain on the polarization of input incident fields has been investigated.…”