Bae, J Chun, J Lee, SB 2024-01-21T14:10:44Z 2024-01-21T14:10:44Z 2021-09-05 2000-04 0021-4922 https://pubs.kist.re.kr/handle/201004/141483 We propose a new method for analyzing fiber Bragg gratings with an arbitrary index profile and an arbitrary individual grating length. The proposed method is based on the lattice filter model which is widely used in applications ranging from digital filtering to speech synthesis and explosive seismic signal processing. Lattice filter interpretation provides us with an accurate and simple tool for analyzing an arbitrary index profile and arbitrary aperiodic fiber grating structures, and gives us further insight into the understanding of fiber Bragg gratings. To verify the validity of the proposed model experimentally, we have fabricated two grating structures; the short-period (periodic) fiber Bragg grating structure and the chirped fiber Bragg grating structure. We have observed that the calculated transmission spectrum and the calculated reflectivity using our lattice filter model match very closely to the corresponding measured spectrum in the wavelength band of interest. English JAPAN J APPLIED PHYSICS SHORT-PERIOD LONG-PERIOD WAVE-GUIDES Analysis of the fiber Bragg gratings using the lattice filter model Article 10.1143/JJAP.39.1752 1 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, v.39, no.4A, pp.1752 - 1756 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 39 4A 1752 1756 scie scopus 000088909200031 2-s2.0-0000500727 Physics, Applied Physics Article SHORT-PERIOD LONG-PERIOD WAVE-GUIDES fiber Bragg gratings lattice filter coupled mode theory