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Highly polarized all-fiber thulium laser with femtosecond-laser-written fiber Bragg gratings

 
: Willis, C.C.C.; McKee, E.; Böswetter, P.; Sincore, A.; Thomas, J.; Voigtländer, C.; Krämer, R.G.; Bradford, J.D.; Shah, L.; Nolte, S.; Tünnermann, A.; Richardson, M.

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Fulltext ()

Optics Express 21 (2013), No.9, pp.10467-10474
ISSN: 1094-4087
English
Journal Article, Electronic Publication
Fraunhofer IOF ()
fiber Bragg grating; lasers; fibers; polarization maintaining

Abstract
We demonstrate and characterize a highly linearly polarized (18.8 dB) narrow spectral emission (<80pm) from an all-fiber Tm laser utilizing femtosecond-laser-written fiber Bragg gratings. Thermally-dependent anisotropic birefringence is observed in the FBG transmission, the effects of which enable both the generation and elimination of highly linearly polarized output. To our knowledge, this is the first detailed study of such thermal anisotropic birefringence in femtosecond-written FBGs.

: http://publica.fraunhofer.de/documents/N-254899.html