Wavelength tunability of L-band fiber ring lasers using mechanically induced long-period fiber gratings

The use of nonlinear dynamics of erbium-doped fiber laser at pump modulation for intra-cavity sensing

“…The modeling procedure was as follows: the results of numerical calculations of Eqs. (1,2), which are the traces P g (t), were transformed, with the use of the FFT, to the frequency domain, that gave us the dependences F r (P p ,g A ). A comparison of the theoretical dependences F r (P p ,g A ) along with the experimental ones (crossed symbols in Fig.…”

“…Erbium-doped fiber lasers (EDFLs) are coherent light sources emitting in a broad spectral range covering the S, C, and L communication bands [1,2]. A variety of EDFL regimes have been demonstrated: multi-wavelength operation [3,4], stable Q-switching and mode-locking [5,6], narrow-line [7] and even single-frequency [8,9] oscillation, wide-range wavelength tuning [1,10], and nonlinear dynamics regimes at external pump modulation [11,12].…”

Tunable Linear Fiber Laser Cavity Based on a Twisted Mechanical Long Period Grating

“…Continuous and pulsed wave linear fiber laser cavities have been attractive for researchers during long period of time [1][2][3], owing to its several advantages such as: compactness, minimal operation elements and stability. Moreover numerous works deals to improve tunability or switch issues, as a result several arrangements based on Fabry-Perot filters [4][5][6][7][8][9][10][11][12], Mach-Zehnder interferometer [13][14][15][16], losses effect in gain medium [17], mechanical long period grating (MLPG) [18][19][20], Sagnac interferometers [21][22][23] and fiber Bragg grating (FBG) [24,25] have been reported. One of the most attracted fiber filter used in fiber laser arrangements are MLPG's, indeed its wide tunable range by twist effect have been widely demonstrated [26,27], moreover this device offers simple design and low cost implementation as well as multiple sensor applications such as: temperature, refractive index and strain.…”

Tunable Fibre Lasers Based on Optical Amplifiers and an Opto-VLSI Processor

“…By thermally tuning the transmissive PS-LCFBG, a tuning range of 15.5 nm was obtained. A tunable L-band fiber laser based on a mechanically induced LPFG into the EDF ring has been demonstrated (Sakata et al, 2009). Wavelength tuning was achieved by adjusting the grating period to shift the rejection band against the ASE spectrum of the ring cavity.…”