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A high-stability wavelength-tunable single-frequency (SF) ytterbium-doped all-fiber compound ring laser has been demonstrated experimentally. The compound ring cavity is composed of a fiber optical tunable filter, a high-finesse ring filter, and a loop mirror filter. Three segments of ytterbium-doped fibers are employed as the gain medium or saturable absorber, respectively. The SF operation is observed...
The relation between the output wavelengths of a laser array and the injection currents of all the channels is experimentally investigated and is found to be approximately linear. Based on this, the authors propose an optimization method of adjusting the wavelength distribution of the laser array by tuning the injection currents. In the proof-of-concept experiment, the linear wavelength residual is...
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