Optical parametric device based on random phase matching in polycrystalline medium

A technology of optical parameters and devices, applied in laser parts, optics, lasers, etc., can solve the problem of QPM nonlinear material size limitation and high cost of QPM materials
CN110546565AActive Publication Date: 2019-12-06UNIV OF CENT FLORIDA RES FOUND INC +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF CENT FLORIDA RES FOUND INC
Publication Date
2019-12-06

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Abstract

An optical parametric device (OPD), which is selected from an optical parametric oscillator (OPO) or optical parametric generator (OPG), is configured with a nonlinear optical element (NOE) which converts an incoupled pump radiation at first frequency into output signal and idler radiations at one second frequency or different second frequencies, which is / are lower than the first frequency, by utilizing nonlinear interaction via a random quasi-phase matching process (RQPM-NOE). The NOE is made from a nonlinear optical material selected from optical ceramics, polycrystals, micro and nanocrystals, colloids of micro and nanocrystals, and composites of micro and nanocrystals in polymer or glassy matrices. The nonlinear optical material is prepared by modifying a microstructure of the initial sample of the NOE such that an average grain size is of the order of a coherence length of the three-wave interaction which enables the three wave nonlinear interaction with a highest parametric gain achievable via the RQPM process
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Description

technical field

[0001] The present disclosure relates to optical parametric devices (OPDs). Specifically, the present disclosure presents an OPD based on random phase matching in polycrystalline dielectric materials with quadratic nonlinearity. The present disclosure also relates to the microstructure of polycrystalline materials and methods of characterizing and optimizing the microstructure. Background technique

[0002] Nonlinear frequency conversion via three-wave mixing, including second harmonic generation (SHG), sum and difference frequency generation (SFG and DFG, respectively), optical parametric generation (OPG), etc., is one of the cornerstones of laser technology . The OPG that is the subject of this disclosure must have a nonlinear optical effect (NOE) that downconverts the laser radiation (pump light) to lower frequency output radiation (signal light and idler light ( idler)). In particular, in NOE crystals, pump photons decay into lower-energy signal and i...

Claims

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