Abstract
In this research, a hepta-cross-ring based erbium-doped fiber (EDF) laser is designed and studied to achieve continuous-wave (CW) and single-longitudinal-mode (SLM) tunability in L-band region. The hepta-cross-ring design can introduce the mode-filter function caused by the Vernier effect to effectively suppress dense multi-longitudinal-mode (MLM). Due to the L-band erbium gain medium, the wavelength-tuning range of the fiber laser is achieved from 1567.6 to 1612.0 nm. Furthermore, the output implementations of optical signal to noise ratio (OSNR), corresponding power, stability and wavelength linewidth in the proposed fiber laser are also measured and discussed.
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