Compact broadband amplified spontaneous emission in Tm-doped tungsten tellurite glass double-cladding single-mode fiber
نویسندگان
چکیده
We reported the ~2 μm amplified spontaneous emission (ASE) performance of highly Tm-doped (3.76 × 10 ions/cm) tungsten tellurite single-mode fibers. The double-cladding fiber was pumped by a commercial 792 nm laser diode without any reflectors. Broadband ASE spectra with the bandwidth (FWHM) varying from ~45 nm to ~140 nm were achieved in a fiber length of 34 cm. The maximum output power was ~34 mW, with a slope efficiency of 4.8%. The ASE beam quality factor (M) was 1.8. The dependence of output power, ASE mean wavelength, and bandwidth on the launched pump power and fiber length were discussed in detail. ©2013 Optical Society of America OCIS codes: (140.6630) Superradiance, superfluorescence; (140.3070) Infrared and far-infrared lasers; (160.3380) Laser materials; (060.2430) Fibers, single-mode; (140.3480) Lasers, diode-
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