External cavity laser diodes with frequency-shifted feedback

A. P. Willis*, A. I. Ferguson, D. M. Kane

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    29 Citations (Scopus)


    Two infrared diode lasers, with one low reflectance facet of 4.5% or 0.1% have been evaluated in an external cavity diode laser (ECDL) with frequency-shifted feedback, with the aim of generating large frequency bandwidth superfluorescent output. A feedback level dependent linewidth broadening up to 750 MHz and 6 GHz respectively, has been observed for single chip mode operation. Both systems show multiple chip mode operation, with increasing frequency-shifted feedback, increasing in bandwidth to greater than 1 THz. The onset of multiple chip mode operation can be suppressed to higher levels of frequency-shifted feedback by the use of a diffraction grating rather than an external mirror in the ECDL.

    Original languageEnglish
    Pages (from-to)87-93
    Number of pages7
    JournalOptics Communications
    Issue number1-3
    Publication statusPublished - 15 Apr 1995


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