title: Broadband Tm-doped superfluorescent fiber source with 11 W single-ended output power.
abstract: High-power operation of a cladding-pumped Tm-doped broadband superfluorescent fiber source in the two-micron wavelength regime is described. Predominately single-ended operation was achieved using a simple all-fiber geometry without the use of a high reflectivity mirror or fiber Bragg gratings. The source produced >11 W of single-ended amplified spontaneous emission output spanning the wavelength range from approximately 1930 nm to 1988 nm for a launched diode pump power of approximately 40 W at approximately 790 nm, corresponding to a slope efficiency of 38% with respect to launched pump power. The wavelength spectrum of the superfluorescent source spanned the range from approximately 1650 to 2100 nm with a bandwidth (FWHM) of > 100 nm for output power levels of < 20 mW.
authors.affiliation: Optoelectronics Research Centre, University of Southampton, Southampton, United Kingdom. des@orc.soton.ac.uk
authors.forename: D Y
authors.initials: DY
authors.lastname: Shen
authors.forename: L
authors.initials: L
authors.lastname: Pearson
authors.forename: P
authors.initials: P
authors.lastname: Wang
authors.forename: J K
authors.initials: JK
authors.lastname: Sahu
authors.forename: W A
authors.initials: WA
authors.lastname: Clarkson
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D053844:Lasers, Solid-State; D008029:Lighting / Q000295:instrumentation*; D013050:Spectrometry, Fluorescence / Q000295:instrumentation*