Title :
Step-changed long-period fiber gratings
Author :
Guan, Bai-Ou ; Zhang, A-Ping ; Tam, Hwa-Yaw ; Chan, Helen L.W. ; Choy, Chung-Loong ; Tao, Xiao-Ming ; Demokan, Muhtesem Sü leyman
Author_Institution :
Dept. of Appl. Phys., Hong Kong Polytech. Univ., Kowloon, China
fDate :
5/1/2002 12:00:00 AM
Abstract :
The spectral characteristics of a new type of long-period grating (LPG) structure, step-changed LPG, are investigated theoretically and experimentally. It is shown that the spectral profile of such gratings can be tailored by adjusting the step parameters. A good agreement between simulated results and measured spectra is obtained. This type of LPG has potential applications in gain flattening of erbium-doped fiber amplifiers.
Keywords :
band-stop filters; diffraction gratings; optical fibre amplifiers; optical fibre filters; optical fibre theory; Er-doped fiber amplifiers; band-rejection transmissive filters; gain flattening; simulated results; spectral characteristics; spectral profile; step parameters; step-changed LPG; step-changed long-period fiber gratings; Attenuation; Coupled mode analysis; Equations; Erbium-doped fiber amplifier; Fiber gratings; Interference; Optical attenuators; Optical coupling; Optical fiber filters; Optical fibers;
Journal_Title :
Photonics Technology Letters, IEEE
