High power tunable multiwavelength random fiber laser at 1.3 μm waveband

Abstract

Multiwavelength fiber lasers, especially those operating at optical communication wavebands such as 1.3 μm and 1.5 μm wavebands, have huge demands in wavelength division multiplexing communications. In the past decade, multiwavelength fiber lasers operating at 1.5 μm waveband have been widely reported. Nevertheless, 1.3 μm waveband multiwavelength fiber laser is rarely studied due to the lack of proper gain mechanism. Random fiber laser (RFL), owing to its good temporal stability and flexible wavelength tunability, is a great candidate for multiwavelength generation. Here, we reported high power multiwavelength generation at 1.3 μm waveband in RFL for the first time. At first, we employed a section of 10 km G655C fiber to provide Raman gains, as a result of which, 1.07 W multiwavelength generation at 1.3 μm waveband with an optical to signal noise ratio of ∼33 dB is demonstrated. By tuning the pump wavelength from 1055 nm to 1070 nm, tunable multiwavelength output covering the range of 1300-1330 nm can be achieved. Furtherly, we realized 4.67 W multiwavelength generation at 1.3 μm waveband by shortening the fiber length to 4 km. To the best of our knowledge, this is the highest output power ever reported for multiwavelength fiber lasers.

A Theoretical Investigation of an Ultrawide S-, C- and L-Band-Tunable Random Fiber Laser Based on the Combination of Tellurite Fiber and Erbium-Doped Fiber

“…Another way to generate widely tunable RFLs is through the combination of tunable pump lasers and cascaded Raman lasing [23][24][25][26][27]. In addition, nearly octave wavelength-tunable RFLs covering a 1-1.9 µm region have been realized by pump wavelength tuning and cascaded Raman shifting, whereas the S-, C-and L-band lasing requires a sixth-to eighthorder cascaded Raman process which requires a high threshold and for which it is difficult to control the lasing bandwidth due to the use of a broadband reflector [23][24][25][26][27][28][29]. On the other hand, the glass hosts (tellurite and bismuth oxide-based glasses) with high refractive indexes have been considered for expanding the gain bandwidth and the tunable range of fiber lasers.…”

Multi-wavelength passively Q-switched laser with Co2+:ZnSe thin film coated microsphere

“…As one of the important members of the fiber laser family, the multi-wavelength fiber laser (MWFL) plays an irreplaceable role in wavelength-division multiplexed (WDM) communication systems, fiber sensing, optical signal processing, spectral analysis, high-resolution spectroscopy and photonic microwave technology [31][32][33][34]. Zhang et al achieved multiwavelength generation at 1.3 µm waveband in random fiber laser through four orders cascaded stimulated Raman scattering for the first time [35]. Tang et al demonstrated a MWFL based on dual-Sagnac comb filter with LP 11 modes output [36].…”

Generation of 1.3/1.4 µm random fiber laser by bismuth-doped phosphosilicate fiber

“…Since then, RFLs have rapidly developed into a vital research interest in fiber lasers due to their clear advantages, including compactness, directionality, high efficiency, and low cost. Various RFL schemes have been proposed with different mechanisms, including nonlinear effects and rareearth-doped active fibers [6][7][8] , and wavelength adjustment and high-power random lasers are developing rapidly [9][10][11] . Due to their outstanding features, RFLs have broad application potential in the fields of high-quality imaging [12] , telecommunications [13] , sensors [14] , and nonlinear optics [15] .…”