Widely Tunable Laser with a 1×3 Multi-Mode Interferometer Based on a Generic Photonic Integration Platform

A widely tunable laser with a
$1\times 3$
multi-mode interferometer based on a generic photonic integration platform, with a coarse tuning range of 26-nm and side-mode suppression ratios close to 40-dB, is reported. The fine tuning over an Acetylene gas cell absorption line is also demonstrated.