Abstract
A single-/dual-wavelength switchable and tunable erbium-doped fiber laser (EDFL) with super-narrow linewidth has been proposed and experimentally demonstrated at room temperature. The fiber laser is based on a compound cavity simply composed of a ring main cavity and a two-ring subring cavity (TR-SC). Regardless of single- or dual-wavelength operation, the EDFL could always work well in single-longitudinal-mode (SLM) state at every oscillating wavelength. In dual-wavelength operation, the spacing could be tuned from 0 nm to 4.83 nm. In single-wavelength operation, the EDFL could lase at a fixed wavelength of 1 543.65 nm or another wavelength with a tunable range of 4.83 nm. The super-narrow linewidths of 550 Hz and 600 Hz for two wavelengths are obtained. The proposed EDFL has potential applications in microwave/terahertz-wave generation and high-precision distributed fiber optical sensing.
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This work has been supported by the Youth Foundation of Hebei Educational Committee (No.QN2015235), the Technology Foundation for Selected Overseas Chinese Scholar of Ministry of Human Resources and Social Security of China (No.CG2015003006), and the Special Funding of Comprehensive Capability Enhancement Program from Hebei University.
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Feng, T., Yan, Fp. & Liu, S. Single-/dual-wavelength switchable and tunable compound-cavity erbium-doped fiber laser with super-narrow linewidth. Optoelectron. Lett. 12, 119–123 (2016). https://doi.org/10.1007/s11801-016-5260-x
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DOI: https://doi.org/10.1007/s11801-016-5260-x