A power scaled diode cladding pumped 2.8 µm Er:ZBLAN fiber laser (Conference Presentation)

G. Alex Newburgh; Mark Dubinskii; Jun Zhang; Wei Lu

doi:10.1117/12.2522816

14 May 2019 A power scaled diode cladding pumped 2.8 μm Er:ZBLAN fiber laser (Conference Presentation)

G. Alex Newburgh, Mark Dubinskii, Jun Zhang, Wei Lu

Proceedings Volume 10981, Laser Technology for Defense and Security XV; 1098107 (2019) https://doi.org/10.1117/12.2522816
Event: SPIE Defense + Commercial Sensing, 2019, Baltimore, MD, United States

Abstract

Recent progress in development of Mid–IR lasers at ~2.8 µm and ~3.5 µm based on commercial Er:ZBLAN fibers has enabled variety of environmental sensing, defense and medical applications. This development faces a few major challenges, among which are relatively low laser efficiency (stemming from the naturally high quantum defect of laser operation) and power scaling limitation due to output self-pulsing (perceived to be coming from presence of clustering or ion pairs in a highly doped fiber, which act as saturable absorbers).We report on a study of the power scaling of a 976 nm diode-pumped double-clad Er:ZBLAN fiber laser at the ~2.8 µm, 4I11/2-4I13/2 transition. The passively cooled 7% Er-doped fluoride fiber laser was shown to achieve slope efficiency over 25% and 50 W with respect to launched pump power in both CW and Quasi-CW regimes of free-running operation. Laser power scaling was found to be limited by available 976 nm diode pump power.

Conference Presentation

Citation Download Citation

G. Alex Newburgh, Mark Dubinskii, Jun Zhang, and Wei Lu "A power scaled diode cladding pumped 2.8 μm Er:ZBLAN fiber laser (Conference Presentation)", Proc. SPIE 10981, Laser Technology for Defense and Security XV, 1098107 (14 May 2019); https://doi.org/10.1117/12.2522816

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