Thulium doped fibre lasers offer an extremely wide tuning range within the 2μm wavelength band. As such they are of great interest to a wide variety of applications, from spectroscopy and remote sensing, to materials processing and laser surgery. Many of these applications require control of the output spectrum to target specific spectral features whilst simultaneously avoiding unwanted atmospheric absorption lines that will attenuate the power delivered to the item of interest. We report on a power-scalable Tm-doped fibre source architecture that produces a pulsed amplified spontaneous emission (ASE) output with wide flexibility in the shape of the emission spectrum.

© 2015 IEEE

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