ALL-FIBER WIDELY TUNABLE THULIUM LASER

We present results from an all-fiber thulium laser system that can be tuned to any 

wavelength between 1710 – 2110 nm, without using any moving mechanical parts. 

An acousto-Optic tunable filter (AOTF) is used as the tuning element, which allows 

for the wavelength to be tuned in ~ 20 ¥ìs. Core-pumped and cladding pumped 

thulium fibers are used to enable lasing action across the wavelength range.




We use in-house fabricated fused fiber couplers and combiners that have a 

flattened coupling response with wavelength to allow for the system to be built in 

an all fiber design. These couplers have a coupling response that only varies 

by +/-10% over the 400 nm operating range.




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