Frequency band optical frequency converter over visible to ultraviolet

摘要

Provides an optical frequency converter of frequency bands ranging from visible to ultraviolet.By controlling the processing period of the nonlinear optical crystal, an additional periodic phase is provided, and the phase matching condition is satisfied to realize the effective optical frequency conversion.An additional periodic phase isLaser micro machiningA phase grating periodically formed at different refractive indices inside the crystal is formed by techniques such as ion etchingAn inverse periodic phase of nonlinear frequency conversion is prevented by breaking the periodic structure of the crystal in the phase lattice to provide an additional periodic phase.Compensation of phase mismatch due to the lack of natural birefringence in nonlinear optical crystals is compensated.An effective frequency multiplication or sum frequency output is realized.The present invention is capable of suitably selecting non-linear optical materials, providing an appropriate periodic phase to select an appropriate crystal according to the required wavelength and match it with a process such as laser photolithography, thereby providing Provide effective output for a particular wavelength.The present invention provides a new type of nonlinear optical frequency conversion device having a high optical frequency conversion efficiency and easy to manufacture.Diagram