Investigation of SOI Raman Lasers for Mid-Infrared Gas Sensing

Abstract

In this paper, the investigation and detailed modeling of a cascaded Raman laser, operating in the midwave infrared region, is described. The device is based on silicon-on-insulator optical waveguides and a coupled resonant microcavity. Theoretical results are compared with recent experiments, demonstrating a very good agreement. Design criteria are derived for cascaded Raman lasers working as continuous wave light sources to simultaneously sense two types of gases, namely C2H6 and CO2, at a moderate power level of 130 mW.

Keywords

• raman lasers
• stimulated raman scattering
• nonlinear waveguides
• optical sensors
• integrated optics
• silicon-on-insulator