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A monolithic MQW InP-InGaAsP-Based optical comb generator

Renaud, CC; Pantouvaki, M; Gregoire, S; Lealman, I; Cannard, P; Cole, S; Moore, R; ... Seeds, AJ; + view all (2007) A monolithic MQW InP-InGaAsP-Based optical comb generator. IEEE Journal of Quantum Electronics , 43 (11-12) 998 - 1005. 10.1109/JQE.2007.904522. Green open access

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We report the first demonstration of a monolithic optical-frequency comb generator. The device is based on multi-section quaternary/quaternary eight-quantum-well InP-InGaAsP material in a frequency-modulated (FM) laser design. The modulation is generated using quantum-confined Stark-effect phase-induced refractive index modulation to achieve fast modulation up to 24.4 GHz. The laser was fabricated using a single epitaxial growth step and quantum-well intermixing to realize low-loss phase adjustment and modulation sections. The output was quasicontinuous wave with intensity modulation at less than 20% for a total output power of 2 mW. The linewidth of each line was limited by the linewidth of the free running laser at an optimum of 25 MHz full-width at half-maximum. The comb generator produces a number of lines with a spacing exactly equal to the modulation frequency (or a multiple of it), differential phase noise between adjacent lines of -82 dBc/Hz at 1-kHz offset (modulation source-limited), and a potential comb spectrum width of up to 2 THz (15 nm), though the comb spectrum was not continuous across the full span.

Type: Article
Title: A monolithic MQW InP-InGaAsP-Based optical comb generator
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JQE.2007.904522
Publisher version: http://dx.doi.org/10.1109/JQE.2007.904522
Language: English
Additional information: (c) 2007 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Keywords: frequency-modulated (FM) laser, laser diode, optical frequency comb generation, FREQUENCY REFERENCE, LASER-DIODE, LOCKING, INJECTION, FIBER, LINE, FM
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/19405
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