VCSEL with multi‐transverse cavities with bandwidth beyond 100 GHz
Elham Heidari, Moustafa Ahmed, Hamed Dalir, Ahmed Bakry, Ahmed Alshahrie, Volker J. Sorger
Abstract
Abstract To fulfill the demands of high‐speed photonic applications, researchers, and engineers have been working to improve the modulation bandwidth (MBW) of semiconductor lasers. We extend our prior work on modeling a vertical‐cavity surface‐emitting laser (VCSEL) with multiple transverse‐coupled‐cavities (MTCCs) to evaluate the feasibility of boosting MBW beyond 100 GHz in this study. Because of the strong coupling of slow‐light feedback from nearby lateral transverse coupled cavities (TCCs) into the VCSEL cavity, the laser has a high modulation performance. The intensity modulation response of the VCSEL design using one, two, four, and six TCCs is compared. Due to the optical‐feedback (OFB) from short TCCs, which achieves 3 dB MBW reaching 170 GHz, photon–photon‐resonance (PPR) is projected to occur at ultra‐high frequencies beyond 145 GHz. In terms of the Fourier spectrum of the relative intensity noise (RIN), we characterize the noise features of the MTCC‐VCSEL in the ultra‐high bandwidth domain.