Continuous-wave, high-power second-harmonic generation in laser-written PPLN-waveguides

Nonlinear Frequency Generation and Conversion: Materials and Devices 2026

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Authors: Anna-Rosa Waidhas, Jachin Kunz, Jens Kießling, Simon J. Herr, K. Buse, Frank Kühnemann
DOI: 10.1117/12.3080667
Cited by: 0
References: 3

Abstract

We present recent progress in direct laser writing of waveguides in periodically poled lithium niobate (PPLN) crystals for nonlinear-optical frequency conversion. For pump powers below 2W, a conversion efficiency of 5.5 %/W is achieved for second-harmonic generation of 780-nm-light with an excellent beam profile. At higher pump powers, the conversion efficiency is reduced. Up to 2W of second-harmonic light are reported which is the first demonstration of Watt-class, continuous-wave frequency conversion in laser-written waveguide in PPLN.

Fields of Study & Subjects

Photorefractive and Nonlinear Optics Solid State Laser Technologies Nonlinear Optical Materials Research

Publication details

Journal / source
Nonlinear Frequency Generation and Conversion: Materials and Devices
Pages
23–23
Publication date
4 March 2026
Language
EN