Backscattering Effects on High-Speed Modulation of Strongly Injection-Locked Whistle-Geometry Semiconductor Ring Lasers

• Published in: IEEE photonics journal Vol. 14; no. 4; pp. 1 - 7
• Main Authors: Smolyakov, Gennady A., Osinski, Marek
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.08.2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Backscatter; Backscattering; Couplings; Direct modulation; Frequency locking; High speed; Laser mode locking; light backscattering; modu- lation response; Modulation; monolithic integration; Numerical prediction; optical injection locking; Propagation modes; Ring lasers; Semiconductor lasers; semiconductor ring lasers; Waveguide lasers
• ISSN: 1943-0655; 1943-0647
• DOI: 10.1109/JPHOT.2022.3197520

An injection-locking scheme, involving a single-frequency master laser monolithically integrated with a unidirectional whistle-geometry semiconductor microring laser, has been proposed for enhanced ultra-high-speed performance. Greatly enhanced high-speed modulation performance of the strong-injection-locking scheme has been predicted in numerical calculations. In our previous analysis, however, linear coupling between the two counter-propagating modes due to light backscattering was not taken into account. In this work, we investigate the potential negative impact of light backscattering between the two counter-propagating modes on high-speed modulation performance of strongly injection-locked unidirectional whistle-geometry semiconductor microring lasers.