Greater than 50% inversion in Erbium doped chalcogenide waveguides

Kunlun Yan, Khu Vu, Rongping Wang, Steve Madden

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)


    We report Er-doped Ge-Ga-Se films and waveguides deposited using co-thermal evaporation and patterned with plasma etching. Strong photoluminescence at 1.54 μm with intrinsic lifetime of 1 ms was obtained from deposited films with 1490 nm excitation. Erbium population inversion up to 50% was achieved, with a maximum of ∼55% possible at saturation for the first time to the author's knowledge, approaching the theoretical maximum of 65%. Whilst gain was not achieved due to the presence of upconversion pumped photoinduced absorption, this nonetheless represents a further important step towards the realization of future chalcogenide Erbium doped waveguide amplifiers at 1550 nm and in the Mid-infrared.

    Original languageEnglish
    Pages (from-to)23304-23313
    Number of pages10
    JournalOptics Express
    Issue number20
    Publication statusPublished - 3 Oct 2016


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