All-fibre ytterbium laser tunable within 45 nm

All-fiber Ho-doped laser tunable in the range of 2.045 – 2.1 μm

“…In the case of compression, a significantly wider tuning range is limited by the limiting strength of the fiber (ε ∼-0.2) [8]. Using the grating compression tunable Yb-, Er-doped and Raman fiber lasers were demonstrated [9][10][11].…”

Compact wavelength-tunable actively Q-switched fiber laser in CW and pulsed operation based on a fiber Bragg grating

“…The pulse repetition rate usually lies in the range of hundreds of Hertz to hundreds of kilohertz. Most of the tunable fiber lasers contain a FBG, which are proposed for synchronous tuning of the high reflection in the output of the FBG to obtain an emission in a 1 µm range [17]. Another technique uses a polarization maintaining FBG, to obtain single wavelength emission and dual-wavelength emission near to the C-band of communications [18,19].…”

Wide range optofluidically tunable multimode interference fiber laser

“…Based on their operational principle, and considering only widely tunable lasers with tuning ranges beyond 50 nm, there Laser Physics Wide range optofluidically tunable multimode interference fiber laser J E Antonio-Lopez 1 , J J Sanchez-Mondragon 2 , P LiKamWa 1 and D A May-Arrioja 3 are nowadays a number of tunable lasers based on different technologies. Typical examples for wide wavelength tuning include Fabry-Perot cavities, bulk gratings, Mach-Zehnder interferometer filters, fiber Bragg gratings (FBG) and allfiber Lyot filters, just to mention a few [4][5][6][7][8][9][10][11][12][13][14][15]. Several works have been previously reported based on Fabry-Perot cavities that exhibit very broad wavelength tuning ranges up to 100 nm [4,5].…”

“…However, very precise mechanical movements are required to bend one of the fiber tapers, which could be a drawback for the laser when operated continuously over long time periods. FBG [10][11][12][13][14] and all-fiber Lyot filters [15] have also been used but their tuning range is limited to below 50 nm. A device that has recently attracted a lot of attention for tunable laser applications is the one based on multimode interference (MMI) effects [16,17].…”