Multistage single clad 2  μm TDFA with a shared L-band pump source

Abstract

We report the experimental performance and simulation of a multiwatt two-stage TDFA using an L-band (1567 nm) shared pump source. We focus on the behavior of the amplifier for the parameters of output power P, gain G, noise figure NF, signal wavelength λ, and dynamic range. We measure the spectral performance of the TDFA for three specific wavelengths (λ=1909, 1952, and 2004 nm) chosen to cover the low-, mid-, and upper-wavelength operating regions of the wideband amplifier. We also compare the performance of the two-stage shared pump TDFA with a representative one-stage shared pump amplifier. A comparison of experimental results with simulation is presented.

Thulium-doped fiber amplifier optimized for wavelengths beyond 1800 nm

“…Currently, the optical fibers usually prepared by well-established modified chemical vapor deposition (MCVD) technology extended with solution doping technique 6 or with ceramic nanoparticles doping 7 can achieve a fluorescence lifetime almost 800 µs 8,9 and thus increase the efficiency of the fibers in applications for amplifiers or broadband sources 10 . TDFAs may become the key enablers in next generation telecom networks with several demonstrations confirming their viability 11,12 . The spectral range 1800-2050 nm is also significant for applications in freespace optical communication 13 , LIDAR based gas sensing 14 , material processing 15 , polymer welding 16 , pumping of solidstate lasers and generation of supercontinuum 17 , optical coherence tomography 18 , defense applications 19 , or medical applications 20 .…”