Zn-indiffused diced ridge waveguides in MgO:PPLN generating 1 watt 780 nm SHG at 70% efficiency

TL;DR

This paper reports a zinc-indiffused diced ridge waveguide in MgO:PPLN that efficiently generates over 1 W of 780 nm second harmonic with 70% conversion efficiency, demonstrating high power output and low loss.

Contribution

Introduction of a zinc-indiffused diced ridge waveguide in MgO:PPLN achieving high power and efficiency in second harmonic generation at 780 nm.

Findings

Generated over 1 W of 780 nm SHG power

Achieved 70% conversion efficiency

Waveguide exhibited low insertion loss and stable output

Abstract

We present a metallic zinc indiffused diced ridge waveguide in magnesium doped periodically poled lithium niobate (MgO:PPLN) capable of generating over 1 W of 780 nm with 70% efficiency. Our 40 mm long waveguide has near circular fundamental mode output with diameter 10.4 um and insertion loss of -1.17 dB. Using a commercial 2 W EDFA-based system, the SHG output power did not exhibit roll-off at maximum available pump power.