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Two types of erbium-doped fiber lasers based on Sagnac interferometer incorporated with fiber grating are proposed and experimentally demonstrated, which effectively support tunable and switchable dual-wavelength single-longitudinal-mode laser operation. The mode selection is implemented by use of the Sagnac interferometer with fiber grating, an umpumped erbium-doped fiber, and a tunable fiber Bragg...
Optoelectronic oscillators are a promising source of spectrally pure, easily tunable microwave signals. These oscillators use a low-loss fiber optic delay line as a very high Q resonant cavity. However, length-dependent sources of phase noise prevent the full Q of the resonant cavity from being realized. Here we show evidence that this length-dependent phase noise is in part dependent upon the optical...
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