Integrated two-section discrete mode laser

P.M. Anandarajah, S. Latkowski, C. Browning, R. Zhou, J. O'Carroll, R. Phelan, B. Kelly, J. O'Gorman, L.P. Barry

Research output: Contribution to journalArticleAcademicpeer-review

25 Citations (Scopus)
48 Downloads (Pure)


The authors present the design and characterization of a novel integrated two-section discrete mode index patterned diode laser source. The two slotted regions etched into the laser ridge waveguide are formed in the same fabrication step as the ridge, thus avoiding the requirement for complex lithography and re-growth steps. The laser is encased in a temperature controlled butterfly package which simplifies the static and dynamic measurements. Initial static characterization of this two-section laser shows that the injection, from the master to the slave laser, enhances the slaves emission SMSR from 30 dB to over 50 dB and its RIN is reduced from about -129.3 dB/Hz to - 142.6 dB/Hz. Subsequent dynamic characterization then shows that the modulation bandwidth of the laser can be improved via injection to about 3 times the inherent free running bandwidth. Hence, optical injection from master section into slave section enables the improvement of various parameters that makes this two-section device attractive as a transmitter in optical communication systems.
Original languageEnglish
Pages (from-to)2085-2094
Number of pages10
JournalIEEE Photonics Journal
Issue number6
Publication statusPublished - 2012


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