An integrated diamond Raman laser pumped in the near-visible

TL;DR

This paper demonstrates an integrated diamond Raman laser pumped in the near-visible spectrum, achieving low threshold, tunable Stokes emission, and high-quality microresonator performance for potential photonics applications.

Contribution

It introduces a novel integrated platform with high-Q diamond microresonators and doped-glass waveguides enabling efficient near-visible Raman lasing.

Findings

Raman lasing threshold as low as 20 mW

Stokes power over 1 mW at 120 mW pump

Tunable Stokes emission over 150 nm bandwidth

Abstract

Using a high-Q diamond microresonator (Q > 300,000) interfaced with high-power-handling directly-written doped-glass waveguides, we demonstrate a Raman laser in an integrated platform pumped in the near-visible. Both TM-to-TE and TE-to-TE lasing is observed, with a Raman lasing threshold as low as 20 mW and Stokes power of over 1 mW at 120 mW pump power. Stokes emission is tuned over a 150 nm (60 THz) bandwidth around 875 nm wavelength, corresponding to 17.5% of the center frequency.