Weak feedback assisted random fiber laser from 45°-tilted fiber Bragg grating

Abstract

We have demonstrated the realization of a high-polarization random fiber laser (RFL) output based on the hybrid Raman and Erbium gain with the tailored effect provided by a 45°-tilted fiber Bragg grating (45°-TFBG), revealing an improvement in the polarization extinction ratio (PER) and achieving a PER of ~15.3 dB. The hybrid RFL system incorporating the 45°-TFBG has been systematically characterized. The random lasing wavelength can be fixed under the extremely weak feedback effect of the 45°-TFBG with reflectivity of 0.09%. In addition, numerical simulation has verified that the weak feedback can boost the random lasing emission with fixed wavelength using a power balance model, which is in good accordance with the experiment results.

Stable Triple-Wavelength Random Fiber Laser Based on Fiber Bragg Gratings

“…Most RFLs based on FBG were configured in a linear cavity [14,[33][34][35] instead of a ring cavity [17,36]. However, the ring cavity's challenge is to produce simultaneous lasing signals due to its long cavity length [17,26,37]. This limitation leads to intense competition between the modes, mode-hopping, and the occurrence of multimode oscillations, which render the laser to be unstable and result in a broader linewidth.…”

An Integrated-Plasmonic Chip of Bragg Reflection and Mach-Zehnder Interference Based on Metal-Insulator-Metal Waveguide

“…It is no doubt that one would like to integrate those important functional devices into a chip for realizing photonic circuits and electronic circuits. For instance, fiber Bragg gratings (FBGs) and Mach-Zehnder interferometers (MZIs) are widely used in the optical fiber communication and sensing systems [28][29][30][31][32][33]. Therefore, it would be interesting to produce their performances in the chip-scale circuits rather than in the traditional fiber waveguides [34,35].…”

Statistical properties of Er/Yb co-doped random Rayleigh feedback fiber laser

“…On the other hand, the concept of random fiber lasers can be extended to various gain media, including the rare-earth (RE)doped gain [23][24][25] , Brillouin gain [26] , and semiconductor amplification [27] . RE-doped random fiber lasers can be constructed by combining the RE-doped active fiber and passive single-mode fiber (SMF), which provide the gain and the randomly distributed feedback, respectively [23][24][25] .…”

“…On the other hand, the concept of random fiber lasers can be extended to various gain media, including the rare-earth (RE)doped gain [23][24][25] , Brillouin gain [26] , and semiconductor amplification [27] . RE-doped random fiber lasers can be constructed by combining the RE-doped active fiber and passive single-mode fiber (SMF), which provide the gain and the randomly distributed feedback, respectively [23][24][25] . RE-doped randomly fiber lasers can generate random lasing in different wavelength regions and have been used in several applications, such as the seed laser in a master oscillator power amplifier (MOPA) system [28,29] , the pump source for a cascaded Raman fiber laser [30] , supercontinuum generation [31] , frequency conversion [32] , and temporal ghost imaging [33] .…”