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Erbium fiber laser based on intracore femtosecond-written fiber Bragg grating

: Wikszak, E.; Thomas, J.; Burghoff, J.; Ortac, B.; Limpert, J.; Nolte, S.; Fuchs, U.; Tünnermann, A.


Optics Letters 31 (2006), No.16, pp.2390-2392
ISSN: 0146-9592
Journal Article
Fraunhofer IOF ()
fiber optic amplifier and oscillator; bragg reflector; femtosecond phenomena; laser material processing

We report the inscription of fiber Bragg gratings (FBGs) into a nonphotosensitive Er-doped fiber by using a phase-mask scanning technique with near IR femtosecond laser pulses. A grating of 40 mm length with a period of 1.075 µm was realized. We measured transmission losses of -18.9 dB at Lambda=1554.5 nm with a FWHM bandwidth of 0.15 nm. By pumping the fiber containing the fabricated FBG, it was possible to realize a fiber laser with an output power of 38 mW, a slope efficiency of 21.1%, and low noise (SNR =60 dB).