An Ultra-Low Noise and Narrow Linewidth λ/4-Shifted DFB Er-Doped Fiber Laser with a Ring Configuration

摘要

We report a polarization-maintaining λ/4-shifted DFB Er-doped fiber laser with a ring cavity configuration. A linewidth as narrow as 6 kHz and relaxation-oscillation-free noise characteristics are achieved with a ring cavitylength of 57 m.