A coupled-local-mode theory is presented for a nonuniform fiber grating with slowly varying background induced-index change. On this basis the transmission spectrum of a Gaussian fiber grating is calculated, and the underlying physical mechanism is studied in detail.
© 1999 Optical Society of America
Original Manuscript: June 1, 1998
Revised Manuscript: November 3, 1998
Manuscript Accepted: January 25, 1999
Published: June 1, 1999
Qingning Li, "Coupled-local-mode theory and study of optical properties of a Gaussian fiber grating," J. Opt. Soc. Am. A 16, 1312-1325 (1999)