Flexible all fiber Fabry-Perot filters based on superimposed chirped fiber Bragg gratings with continuous FSR tunability and its application to a multiwavelength fiber laser.

摘要: We proposed and experimentally demonstrate a simple flexible scheme of all-fiber Fabry-Perot filter with continuous free spectral range tunability exploiting superimposed chirped fiber Bragg grating. Then, we apply the continuously tunable multichannel to multiwavelength SOA ring laser at room temperature. The specially designed apparatus can induce symmetrical strain gradient modify chirp ratio along grating attached onto cantilever beam. Then be controlled by variation reflection bandwidth without center wavelength shift, which depends on moving direction translation stage. provide effective tunability. successfully achieve stable operation eleven lasing channels based flexibly