We propose a new recirculating fiber delay-line filter structure. In the proposed system a fiber Bragg grating (FBG) is used as a multireflection mirror in a fiber delay loop, and an erbium-doped fiber is used to provide gain in the loop. By adjusting parameters such as the coupling efficiency, the reflectivity of the FBG, and the gain, we can change the characteristics of the filter transfer function.
© 1998 Optical Society of America
(050.2770) Diffraction and gratings : Gratings
(060.2310) Fiber optics and optical communications : Fiber optics
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
Sungchul Kim and Byoungho Lee, "Recirculating Fiber Delay-Line Filter with a Fiber Bragg Grating," Appl. Opt. 37, 5469-5471 (1998)