Title :
Design and fabrication of flat-band long-period grating
Author :
Zhang, J. ; Shum, P. ; Li, S.Y. ; Ngo, N.Q. ; Cheng, X.P. ; Ng, J.H.
Author_Institution :
Network Technol. Res. Center, Nanyang Technol. Univ., Singapore, Singapore
Abstract :
A method to realize the practical flat-band long-period fiber grating (LPG) fabrication is proposed. Based on the results obtained from the layer-peeling method, we have analyzed the structure of the designed flat-band LPG. We found that the designed LPG is an apodized LPG with sinc-like envelope and a constant period, while there exists a /spl pi/ phase shift at each zero point of the apodization profile. For the first time, a flat-band LPG is realized in fabrication. The experimental result shows a good match with our theoretical analysis.
Keywords :
diffraction gratings; optical design techniques; optical fabrication; optical fibre theory; /spl pi/ phase shift; apodization profile; apodized LPG; constant period; design; fabrication; flat-band long-period grating; layer-peeling method; practical flat-band long-period fiber grating fabrication; sine-like envelope; zero point; Bragg gratings; Fiber gratings; Frequency conversion; Optical coupling; Optical device fabrication; Optical fiber filters; Optical filters; Optical frequency conversion; Passband;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.818666
