Optimization of widely tuneable hybrid erbium-Raman-gain random fibre laser: theoretical investigation

Su, Boli; Luo, Qingshan; Zhao, Lei; Chu, Ling; Wang, Li; Liu, Chunxia; He, Xian-Hui

doi:10.1080/09500340.2021.1953170

Cited by 2 publications

(1 citation statement)

References 29 publications

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“…The hybrid gain is further used to extend the wavelength tunability performance of RFLs. By adopting the hybrid Er-Raman gain, 1525-1603 nm random lasing can be realized with a forward pump structure [20][21][22]. Another way to generate widely tunable RFLs is through the combination of tunable pump lasers and cascaded Raman lasing [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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

Chen,

Li,

Liang

et al. 2024

Photonics

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In this paper, we present a new scheme to generate ultrawide tunable random fiber lasers (RFLs) covering the S-, C- and L-band by combining the broadband Raman gain in tellurite fibers and the active gain in erbium-doped fibers. A numerical simulation based on the power-balance model is conducted to verify the feasibility of the ultrawide tunable random fiber lasing generation. Pumped by a 1450 nm laser, the tunable random Raman fiber laser in the ranges of 1480–1560 nm and 1590–1640 nm can only be realized with a tellurite fiber. To further fill in the emission gap in the range of 1560–1590 nm, the erbium-doped fiber is incorporated in the cavity, which can provide efficient erbium-doped gain in the C- and L-band. By combining a 100 m long tellurite fiber and an 8 m long erbium-doped fiber, an ultrawide tunable RFL based on hybrid erbium–Raman gain can be realized with a wavelength tuning range (1480 nm–1640 nm) covering the S-, C- and L-band at 3.5 W pump power. Such a widely tunable RFL is of great importance in applications such as optical communication, sensing and imaging.

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