A single-longitudinal-mode Brillouin fiber laser passively stabilized at the pump resonance frequency with a dynamic population inversion grating

Abstract

We demonstrate a single-longitudinal-mode Brillouin ring fiber laser passively stabilized at the resonance frequency with a 1.7 m section that is an unpumped polarization-maintaining erbium-doped fiber. The two coupled all-fiber Fabry–Perot interferometers that comprise the cavity, in combination with the dynamical population inversion gratings self-induced in the active fiber, provide adaptive pump-mode selection and Stokes wave generation at the same time. The laser is shown to emit a single-frequency Stokes wave with a linewidth narrower than 100 Hz.

Fiber Laser for Phase-Sensitive Optical Time-Domain Reflectometry

“…It is well known that self-injection locking of conventional telecom DFB lasers could significantly improve their spectral performance [23][24][25][26][27][28][29][30][31][32][33][34]. In our previous works, we have demonstrated substantial narrowing of the laser linewidth due to a spectrally selective feedback realized with FORR built from low-cost standard fiber telecom components [35][36][37].…”

Locking of the DFB laser through fiber optic resonator on different coupling regimes

“…Optical waveguide resonators are intensively studied for number of very different applications including signal modulation, optical filtering, dispersion compensation, fiber lasers, wavelength switching and others [14][15][16][17][18][19]. The optical transfer characteristics of the ring resonator strongly depend on the coupling factor.…”

Adjustment of double resonance in short cavity Brillouin fiber lasers

“…Therefore, Brillouin gain is commonly used for narrow-line lasing in fiber configurations enabling a variety of the performance characteristics [2][3][4][5][6][7] . Lately developed Brillouin fiber lasers with a so-called doubly-resonant cavity (DRC) demonstrate low threshold, high spectral purity and low intensity noise [8][9][10][11][12][13][14][15][16] , and are very promising for a variety of special uses, such as coherent optical communication, interferometric sensing, coherent radar detection, and microwave photonics. In DRC lasers, a singlefrequency Stokes radiation is generated within a short ring cavity which is simultaneously resonant for pump and Stokes waves.…”

“…In DRC lasers, a singlefrequency Stokes radiation is generated within a short ring cavity which is simultaneously resonant for pump and Stokes waves. Typically, in order to obtain an established single frequency operation, various forms of active [8][9][10] or passive 11,12 control systems are used. However, such systems are generally designed for the mode hopping control and cannot provide the adjustment of the resonance conditions itself.…”