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A tunable self-seeded multi-wavelength Brillouin-erbium fiber laser (BEFL) is proposed and demonstrated based on a few-mode fiber filter (FMFF) with varying temperature. The FMFF configuration is a section of uncoated few-mode fiber (FMF) sandwiched between two up-tapers. As the temperature varies from 25 °C to 125 °C, the transmission spectrum of FMFF moves towards the longer wavelength. The self-excited...
The spectral characteristics of the splitting angle and its asymmetry for double-Wollaston prism are analyzed theoretically. With the increase of the prism structure angle, the splitting angle of the double Wollaston prism and its asymmetry increase. However, the splitting angle decreases with the increase of the wavelength of incident light. The influence of the incident light wavelength on the splitting...
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