闲频光单谐振KTiOAsO4涡旋光参量振荡器的研究

Abstract

Objective Optical vortex lasers, with good beam quality in the midinfrared spectral region, has many interesting applications such as superresolution molecular absorption microscopy and molecular spectroscopy. The optical parametric oscillator (OPO) has been established as the most direct method to change the wavelength and transition the orbital angular momentum (OAM) of an optical vortex pump beam. A singleidler resonant cavity can produce a highquality midinfrared vortex output. However, one of the main challenges has been to manage the transfer of OAM from the pump beam to the midinfrared idler output, especially given the