Long-period fiber grating as wavelength selective element in double-clad Yb-doped fiber-ring lasers

Details Long-period fiber grating as wavelength selective element in double-clad Yb-doped fiber-ring lasers Long-period fiber grating as wavelength selective element in double-clad Yb-doped fiber-ring lasers

2009-11-20

arxiv.org/abs/0911.3958v1

Laser Physics Letters 6, 10 (2009) 2335-2338

Physics

Optics

Scientific paper

Selection of operating wavelength of the Yb-doped fiber-ring lasers using longperiod fiber gratings (LPFGs) is suggested. In the proposed method, customized LPFG that sustains high powers serves as a broad-band rejection filter. It modifies the net gain profile of the laser, enabling the peak gain to occur at a designed wavelength. Spectral range of oscillation between 1050-1110 nm was experimentally demonstrated. This range can be extended to both shorter and longer wavelengths with proper design of the LPFG and length of the Yb-doped fiber. The gratings were inscribed by CO2 laser and the grating period down to 175 ?m was achieved being, to our best knowledge, the shortest reported LPFG period using this technique.

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