C-cavity fiber laser employing a chirped fiber Bragg grating for electrically gated wavelength tuning

• DOI: 10.1364/oe.383398
• Publication Date: 2020-01-27T07:30:09Z
• Authors: Robert Lindberg; Fredrik Laurell; Krister Fröjdh; Walter Margulis
• Keywords: Fiber Bragg Grating; PHOSFOS

We present a novel C-cavity concept for tunable lasers. The laser is based on semiconductor optical amplifier (SOA), serving both as gain medium well modulator, and chirped fiber Bragg grating (C-FBG) which acts the end mirrors cavity ends. Driving SOA with pulse pair variable delay enables wavelength tuning by targeting different regions in C-FBG circulating pulse. design allows wide while maintaining constant repetition rate, we show range of 35 nm -limited C-FBG's reflection bandwidth. Time-multiplexed operation four wavelengths also demonstrated. Furthermore, performance dynamics under operating conditions are analyzed discussed.