Frequency Conversion in KTP Crystal and Its Isomorphs

Abstract

We report the results of an analysis of the functional capabilities of the KTP crystal and its isomorphs for nonlinear-optical frequency conversion of all types of interactions in the transparency range of the crystal. The possibility of implementing angle, wavelength (frequency), and temperature-noncritical phase matching is shown.

Optimization on the frequency conversion of LiGaS2 crystal

“…The maximal FM is an important guidance for applications of LGS, albeit some possible deviations in nonlinear coefficients. Moreover, it can be generalized to other biaxial crystals, similar to the previous work [19].…”

“…Combining equations ( 1) and ( 5), a maximum efficiency can be estimated by an optimal FM value at given mixing wavelengths. Compared with previous investigation on FM [18,19], we take equation ( 6) as an effective estimation incorporating dispersion of nonlinearity. The computation steps are as follows.…”

High-Efficiency Broadband Near-Infrared Single-Photon Frequency Upconversion and Detection*

“…[26] In addition, there is wide spectral bandwidth of phase matching at the tracing point of nonlinear crystals, which has been applied in second harmonic generation and sum frequency generation. [27,28] However, due to the limit of groupvelocity mismatch, the phase matching at the tracing point can be only achieved around one specific wavelength, which depends on the properties of nonlinear crystals.…”