Distributed feedback and distributed Bragg reflector lasers: comparisons of performance and use

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The distributed feedback (DFB) laser has emerged as the clear choice for high-bit-rate point-to-point links based on today's systems demands and in-place laser manufacturing technology. However, other laser geometries have also proved capable of a high degree of spectral purity, in particular, the distributed Bragg reflector (DBR) semiconductor laser. The advent of high-quality vapor and beam growth techniques in the InGaAsP/InP system now permits both precise layer composition and thickness control and the utilization of ultrathin etch-stop fabrication techniques, which are essential in achieving reproducible high-performance active-passive DBR transitions. Current trends suggest that DFBs may have a stable role as the workhorse in high-bit-rate, point-to-point, single-channel or coarsely spaced wavelength-division-multiplexed (WDM) applications. However, the versatility of the DBR combined with other basic design features suggests that it may dominate in future densely spaced WDM and coherent applications.

Original languageEnglish (US)
Title of host publicationOpt Fiber Commun Conf Summ Pap
PublisherPubl by IEEE
Number of pages1
Publication statusPublished - 1989
Externally publishedYes
EventOptical Fiber Communication Conference: Summaries of Papers - Houston, TX, USA
Duration: Feb 6 1989Feb 9 1989


OtherOptical Fiber Communication Conference: Summaries of Papers
CityHouston, TX, USA

ASJC Scopus subject areas

  • Engineering(all)

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