Light amplification by stimulated Raman scattering in AlGaAs-based photonic-crystal line-defect waveguides

Abstract

The authors performed an amplification experiment of optical signal around 1550 nm by stimulated Raman scattering in a photonic-crystal slab waveguide (WG) of single-line defect. They adopted an air-bridge type AlGaAs-based WG sample to avoid two-photon absorption. Short light pulses of 5 ps in duration operated at 20 MHz and a cw laser were employed for pump (excitation) and probe (signal) lights, respectively. As a result, amplification of a net gain of ∼3 dB (maximum) is achieved with pulse pump energy of 22 pJ for a sample of 1.0 mm in length.