Abstract
We report the development of a widely tunable all-fiber mid-infrared laser system based on a mechanically robust fiber Bragg grating (FBG) which was inscribed through the polymer coating of a Ho3+-Pr3+ co-doped double clad ZBLAN fluoride fiber by focusing femtosecond laser pulses into the core of the fiber without the use of a phase mask. By applying mechanical tension and compression to the FBG while pumping the fiber with an 1150 nm laser diode, a continuous wave (CW) all-fiber laser with a tuning range of 37 nm, centered at 2870 nm, was demonstrated with up to 0.29 W output power. These results pave the way for the realization of compact and robust mid-infrared fiber laser systems for real-world applications in spectroscopy and medicine.
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@article{Bharathan2017, title = {Direct inscription of Bragg gratings into coated fluoride fibers for widely tunable and robust mid-infrared lasers}, author = {G. Bharathan, R. I. Woodward, M. Ams, D. D. Hudson, S. D. Jackson A. Fuerbach }, url = {https://riwoodward.com/publication_files/bharathan_2017_fbg.pdf}, doi = {10.1364/OE.25.030013}, year = {2017}, date = {2017-11-20}, journal = {Optics Express}, volume = {25}, pages = {30013}, abstract = {We report the development of a widely tunable all-fiber mid-infrared laser system based on a mechanically robust fiber Bragg grating (FBG) which was inscribed through the polymer coating of a Ho3+-Pr3+ co-doped double clad ZBLAN fluoride fiber by focusing femtosecond laser pulses into the core of the fiber without the use of a phase mask. By applying mechanical tension and compression to the FBG while pumping the fiber with an 1150 nm laser diode, a continuous wave (CW) all-fiber laser with a tuning range of 37 nm, centered at 2870 nm, was demonstrated with up to 0.29 W output power. These results pave the way for the realization of compact and robust mid-infrared fiber laser systems for real-world applications in spectroscopy and medicine.}, keywords = {fbg, fibre laser}, pubstate = {published}, tppubtype = {article} }