Webmechanical stress can be used to significantly change the phase-matching properties of a birefringent crystal. As an example, we demonstrate the shift of second harmonic non-critical phase matching wavelength of LiB3O5 (LBO) crystal at room temperature from 1200 nm to 1120 nm by applying compressive forces up to 100 MPa. WebFeb 26, 2024 · Under an ultrafast infrared excitation at 1280 nm, the considerably high optical conversion efficiency of ~ 0.7% at a THG wavelength of 427 nm is obtained, and the THG signal can be tuned over ultra-broadband range from 420 to 730 nm. We argue that the THG efficiency is originating from minimum absorption loss and phase-matching …

Quasi-phase-matching - Wikipedia

WebBBO Crystal Phase Matching Angle HG phase matching angle dependence on input radiation wavelength is shown in fig. 2 BBO Crystal Phase Matching Angle BBO … WebMay 26, 2024 · In order to achieve collinear phase-matched nonlinear optical frequency conversion in cubic crystals, a novel method to induce and modulate the birefringence … cih zemamra

Phase Matching - an overview ScienceDirect Topics

WebWhat does phase matching mean? When k = 0, this means that n( ) = n(2 ). The phase velocity of the input and the 2nd harmonic are equal. = 2 2 . The condition kL<< 1 … WebMay 26, 2024 · In order to achieve collinear phase-matched nonlinear optical frequency conversion in cubic crystals, a novel method to induce and modulate the birefringence based on the linear electro-optic effect was studied. Taking terahertz generation with ZnTe and CdTe crystals of the 4¯3m point group as an example, an external electric field provided … WebBBO crystal remains the most versatile nonlinear optical crystals thanks to its unique combination of optical properties (e.g. broad transmission and phase matching ranges, … cih us