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We presented a random distributed feedback (RDFB) fiber laser with widely tunable range that covers both C- and L-band. It is formed by a half-open cavity with forward pumping scheme. The hybrid gain from erbium-doped fiber (EDF) and single-mode fiber (SMF) enables the fiber laser to oscillate with not only a broadband tunability, but also a low laser threshold. The proposed fiber laser can be tuned...
A tunable erbium-doped fiber (EDF) laser based on random distributed feedback through backward Rayleigh scattering in a 20-km-long single-mode fiber and a tunable fiber Fabry–Perot interferometer filter is demonstrated. It has a broad wavelength tuning range up to 40 nm (from 1525 to 1565 nm) with a narrow linewidth of $\sim$0.04 nm. Due to the half-opened laser cavity design and the efficient gain...
Based on the double exposure technology, a novel dual-wavelength distributed feedback (DFB) fiber laser with a wavelength spacing of 400pm is proposed and experimentally demonstrated. By employing an equivalent phase shift, only a submicrometer-level precision is required in the fabrication for realizing precise phase control.
This laser is robust, compact and might be a simple and low cost source for distributed Brillouin back-scattering sensors, where the light source employed in most of these applications includes an external cavity diode laser plus a pigtailed modulator and an optical fiber amplifier.
The distributed feedback (DFB) fiber laser strain sensor has demonstrated strain resolution comparable to that obtained from high-performance fiber-optic interferometry. This manuscript describes the characteristics and performance of this fiber laser strain sensor and discusses the technological developments necessary to obtain comparable performance from a multiplexed array of laser sensors. The...
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