Low-κ, narrow linewidth III-V-on-SOI distributed feedback lasers with backside sampled Bragg gratings

Joan Manel Ramirez; Amin Souleiman; Pierre Fanneau de la Horie; Delphine Neel; Nicolas Vaissiere; Valentin Ramez; Claire Besancon; Stephane Malhouitre; Arnaud Wilk; Kamel Merghem; Jean Decobert; Karim Hassan; David Bitauld

doi:10.1364/OE.469735

Low-κ, narrow linewidth III-V-on-SOI distributed feedback lasers with backside sampled Bragg gratings

Opt Express. 2022 Sep 26;30(20):36717-36726. doi: 10.1364/OE.469735.

Authors

Joan Manel Ramirez, Amin Souleiman, Pierre Fanneau de la Horie, Delphine Neel, Nicolas Vaissiere, Valentin Ramez, Claire Besancon, Stephane Malhouitre, Arnaud Wilk, Kamel Merghem, Jean Decobert, Karim Hassan, David Bitauld

PMID: 36258595
DOI: 10.1364/OE.469735

Abstract

We demonstrate a heterogeneously integrated III-V-on-SOI distributed feedback laser with a low grating strength (κ < 40 cm^-1) and a narrow linewidth of Δν = 118 kHz. The laser operates single mode with a side-mode suppression ratio over 45 dB, provides a single-sided waveguide-coupled output power of 22 mW (13.4 dBm) and has a wall-plug efficiency of 17%. The dynamic characteristics were also evaluated, obtaining an intrinsic 3 dB modulation bandwidth of 14 GHz and a photon lifetime of 8 ps. Large-signal intensity modulation using a 2³¹-1 PRBS pattern length revealed open eye diagrams up to 25 Gb/s and a penalty on the dynamic extinction ratio lower than 1 dB after transmission over a 2 km standard single mode optical fiber.