Abstract

A partly periodically poled ${\mathrm{KTiOPO}}_4$ (KTP) crystal has been designed to integrate quasi-phase-matched second-harmonic generation (QPM SHG) with sum-frequency generation in one crystal for generating a third-harmonic beam. The highest conversion efficiencies of 45% and 3% have been achieved in our experiments for QPM SHG and third-harmonic generation, respectively, by use of picosecond laser pulses at $1.327 \mu \mathrm{m}$. We have also discovered that periodically poled KTP has slightly different indices $\left(n_z\right)$ from bulk KTP.

© 2001 Optical Society of America

High efficiency cascaded third-harmonic generation in a quasi-periodically poled KTiOPO₄ crystal

Augustin Vernay, Lucas Bonnet-Gamard, Véronique Boutou, Sivan Trajtenberg-Mills, Ady Arie, and Benoît Boulanger
OSA Continuum 3(6) 1536-1544 (2020)

Third-harmonic generation in a general two-component quasi-periodic optical superlattice

Chao Zhang, Hong Wei, Yong-Yuan Zhu, Hui-Tian Wang, Shi-Ning Zhu, and Nai-Ben Ming
Opt. Lett. 26(12) 899-901 (2001)

Third-harmonic generation by cascading second-order nonlinear processes in a cerium-doped KTiOPO₄ crystal

Xiaodong Mu, Xinhua Gu, Maxim V. Makarov, Yujie J. Ding, Jiyang Wang, Jingqian Wei, and Yaogang Liu
Opt. Lett. 25(2) 117-119 (2000)

Backward second-harmonic and third-harmonic generation in a periodically poled potassium titanyl phosphate waveguide

Xinhua Gu, Maxim Makarov, Yujie J. Ding, Jacob B. Khurgin, and William P. Risk
Opt. Lett. 24(3) 127-129 (1999)

Ultraviolet generation by first-order frequency doubling in periodically poled KTiOPO₄

S. Wang, V. Pasiskevicius, F. Laurell, and H. Karlsson
Opt. Lett. 23(24) 1883-1885 (1998)