Optical gain in laser diodes with null reflectivity. (September 2019)

• Record Type: Journal Article
• Authors: Vanzi, M.; Mura, G.; Rampulla, A.; Marchetti, R.; Sanna Valle, V.; Ueno, Y.
• Is Part Of: Microelectronics and reliability. Volume 100/101(2019)
• Publication Date: 2019-09
• Subjects: Electronic apparatus and appliances -- Reliability -- Periodicals; Miniature electronic equipment -- Periodicals; Appareils électroniques -- Fiabilité -- Périodiques; Équipement électronique miniaturisé -- Périodiques; Electronic apparatus and appliances -- Reliability; Miniature electronic equipment; Periodicals; 621.3815
• DOI: 10.1016/j.microrel.2019.113455
• Languages: English
• ISSNs: 0026-2714

Abstract

Abstract: Optical gain measurement is extended to chips designed for external cavity lasers, where facet reflectivity is intentionally kept null, which prevents from any application of the Hakki-Paoli method. The new method is first shown to be consistent with the standard methods, by applying it to a chip with Fabry-Perot resonances and comparing the results of the new and the Hakki-Paoli method. The validated new method is then applied to the non-reflecting cavity of a tunable laser diode based on external cavity. Highlights: Optical Gain measurement is proposed for non-reflecting cavities. It stands on photon density calculation after a single-trip, and refers to a steady-state balance equation. Results are compared between the new method and the consolidated Hakki Paoli method for a Fabry-Perot cavity. Validation leads to absolute gain measurement in a real non-reflecting cavity.