Novel >57 GHz bandwidth O-band InGaAlAs MQW RW DFB

• Main Authors: Vasudevan Rajeswari, Gayatri, Möhrle, Martin, Ehrensack, Falco, Troppenz, Ute, Sigmund, Ariane, Schell, Martin
• Format: Conference Object
• Language: English
• Published: 2023
• Subjects: directly modulated laser (DML); distributed feedback (DFB) lasers; high-speed transmitter; multi-section lasers; optical fiber communication; photon photon resonance (PPR); semiconductor laser; DML
• Online Access: https://publica.fraunhofer.de/handle/publica/449520; https://doi.org/10.1117/12.2656921

We present a novel Dual DFB laser for high-speed direct modulation. The design comprises two identical quarter-wavelength shifted DFBs in mirrored configuration separated by a passive waveguide. This structure utilizes the effect of photon-photon resonance to increase the modulation bandwidth of 57.6GHz. Operation of these devices under large signal modulation at 56Gbps and 72Gbps is demonstrated.