Performance characterization of mid-infrared difference-frequency-generation in orientation-patterned gallium phosphide
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European Commission's projectMid-TECH - Infrared sensing made visible: Combining infrared light sources and upconversion sensors for improved sensitivity in medical applications and gas analysis (EC-H2020-642661)
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/cm2 at 1064 nm.
CitationWEI, JUNXIONG [et al.]. Performance characterization of mid-infrared difference-frequency-generation in orientation-patterned gallium phosphide. "Optical Materials Express", 8 Febrer 2018, vol. 8, núm. 3, p. 555-567.