Orientation-patterned gallium phosphide (OP-GaP) crystals are used here for the first time for the generation of continuous-wave coherent mid-infrared radiation around 5.85μm by dierence frequency generation (DFG) of a Nd:YAG laser at 1064 nm and a diode-laser at 1301 nm. We provide the first characterization of the linear,thermo-optic and nonlinear properties of OP-GaP in a DFG configuration, and we derive an effective nonlinear coeffcient deff = 17 pm/V (3) for first-order quasi-phase-matched OP-GaP. This novel nonlinear material can be used to referenced the mid-IR light to a frequency standard by locking the pump and signal laser to a near-IR optical frequency comb.
|Title of host publication||Proc SPIE|
|Subtitle of host publication||Nonlinear Frequency Generation and Conversion: Materials and Devices XVI|
|Pages||100880W-1 / 100880W-9|
|Number of pages||9|
|Publication status||Published - 2017|