Title :
Band-pass filter with flat time delay response based on fiber grating Sagnac loop
Author :
Shu, Xuewen ; Sugden, Kate ; Zhao, Donghui ; Zhang, Lin ; Bennion, Ian
Author_Institution :
Indigo Photonics Ltd., Birmingham, UK
Abstract :
We have developed the analytic expressions for the phase response and time delay of FBGSL of arbitrary grating structure and found that the results from the modelling are in excellent agreement with that of the experimentally measured real devices. The theoretical and experimental investigation clearly reveals that FBGSLs utilizing uniform and linearly chirped gratings exhibit a near-constant time delay in the passbands. Such multi-channel bandpass filters should be highly attractive to WDM applications as they are operating in transmission regime and offering near-zero dispersion.
Keywords :
band-pass filters; chirp modulation; delays; diffraction gratings; optical fibre dispersion; optical fibre filters; optical modulation; wavelength division multiplexing; FBGSL; WDM applications; analytic expressions; arbitrary grating structure; fiber grating Sagnac loop; linearly chirped gratings; modelling; multi-channel bandpass filters; near zero dispersion; near-constant passband time delay; phase response; time delay; transmission regime; uniform chirped gratings; Band pass filters; Bragg gratings; Chirp; Delay effects; Fiber gratings; Optical fiber devices; Passband; Phase measurement; Sagnac interferometers; Wavelength division multiplexing;
Conference_Titel :
Optical Fiber Communication Conference and Exhibit, 2002. OFC 2002
Print_ISBN :
1-55752-701-6
DOI :
10.1109/OFC.2002.1036654
