Add time:08/08/2019         Source:sciencedirect.com

A tunable dual-wavelength fiber ring-cavity laser based on semiconductor optical amplifier (SOA) using two external-injected distributed feedback (DFB (cas 15332-10-2)) lasers is proposed and experimentally demonstrated. When one of the injected DFB lasers operates at 25 °C and the other at 0 °C, a stable dual-wavelength simultaneous oscillation at 1553.68 nm and 1553.90 nm with a wavelength spacing of 0.22 nm is achieved. The wavelength spacing can be tuned by adjusting the operating temperatures of the two injected DFB lasers, and a tuning range from 0.22 nm to 2.95 nm is obtained. Our experimental results demonstrate the new concept of dual-wavelength fiber ring-cavity laser using two DFB lasers injection and the technical feasibility.

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