Restoration of distorted images, terahertz generation and terahertz interference based on multiple-coupled optical parametric oscillators

23rd International Laser Physics Workshop

Ding, Yujie J.^1

Department of Electrical and Computer Engineering, Center for Photonics and Nanoelectronics, Lehigh University, Bethlehem

PA

18015, United States^1

关键词: Adhesive free bonded;    Distorted images;    Interference effects;    Output couplers;    Phase conjugates;    Phase distortions;    Spatial profiles;    Terahertz generation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/594/1/012012/pdf
DOI  :  10.1088/1742-6596/594/1/012012

来源: IOP

【 摘 要 】

We review our progress made on applications of coupled optical parametric oscillators based on a composite consisting of adhesive-free-bonded KTiOPO4 stacks. By using the phase- conjugate output generated by the composite, we have demonstrated that the spatial profile after the beam propagates through the phase-distorted medium can be restored to the profile before the distortion. In addition, we have restored the images being blurred by the phase distortion. We have efficiently generated terahertz outputs by mixing the idler twins from the coupled optical parametric oscillators. By using the alternatively-rotated GaP plates as an output coupler for the coupled optical parametric oscillators, we have efficiently generated terahertz waves based on an intracavity configuration. By placing both the composite and a bulk KTiOPO4 crystal in the same cavity, we have demonstrated the interference effect of the THz waves generated by using different pairs of the optical beams.