Near-constant time delay response of fiber grating Sagnac loop filters

Xuwen Shu; Donghui Zhao; Lin Zhang; Kate Sugden; Ian Bennion

doi:10.1109/LPT.2002.1021991

Near-constant time delay response of fiber grating Sagnac loop filters

Xuwen Shu^*, Donghui Zhao, Lin Zhang, Kate Sugden, Ian Bennion

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

A theoretical and experimental investigation of the time delay characteristics of fiber Bragg grating-based Sagnac loops (FBGSLs) is presented. Analytic expressions for the phase and time delay of the FBGSL have been derived and excellent agreement is found between their predictions and experimental results for configurations incorporating uniform-period and chirped-period gratings. For symmetrical grating structures, it is found that the FBGSL time delay response is similar to that of the incorporated grating; with asymmetrical gratings, the FBGSL response is quite different. It is shown that wavelength-division-multiplexing filters exhibiting near-zero dispersion characteristics can be implemented using FBGSLs.

Original language	English
Pages (from-to)	1127-1129
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	14
Issue number	8
DOIs	https://doi.org/10.1109/LPT.2002.1021991 https://doi.org/10.1109/LPT.2002.1021991
Publication status	Published - Aug 2002

Keywords

near-constant passband time delay
time delay response
Sagnac loop
filters
fiber Bragg grating
optical filter

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title = "Near-constant time delay response of fiber grating Sagnac loop filters",

abstract = "A theoretical and experimental investigation of the time delay characteristics of fiber Bragg grating-based Sagnac loops (FBGSLs) is presented. Analytic expressions for the phase and time delay of the FBGSL have been derived and excellent agreement is found between their predictions and experimental results for configurations incorporating uniform-period and chirped-period gratings. For symmetrical grating structures, it is found that the FBGSL time delay response is similar to that of the incorporated grating; with asymmetrical gratings, the FBGSL response is quite different. It is shown that wavelength-division-multiplexing filters exhibiting near-zero dispersion characteristics can be implemented using FBGSLs.",

keywords = "near-constant passband time delay, time delay response, Sagnac loop, filters, fiber Bragg grating, optical filter",

author = "Xuwen Shu and Donghui Zhao and Lin Zhang and Kate Sugden and Ian Bennion",

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T1 - Near-constant time delay response of fiber grating Sagnac loop filters

AU - Shu, Xuwen

AU - Zhao, Donghui

AU - Zhang, Lin

AU - Sugden, Kate

AU - Bennion, Ian

PY - 2002/8

Y1 - 2002/8

N2 - A theoretical and experimental investigation of the time delay characteristics of fiber Bragg grating-based Sagnac loops (FBGSLs) is presented. Analytic expressions for the phase and time delay of the FBGSL have been derived and excellent agreement is found between their predictions and experimental results for configurations incorporating uniform-period and chirped-period gratings. For symmetrical grating structures, it is found that the FBGSL time delay response is similar to that of the incorporated grating; with asymmetrical gratings, the FBGSL response is quite different. It is shown that wavelength-division-multiplexing filters exhibiting near-zero dispersion characteristics can be implemented using FBGSLs.

AB - A theoretical and experimental investigation of the time delay characteristics of fiber Bragg grating-based Sagnac loops (FBGSLs) is presented. Analytic expressions for the phase and time delay of the FBGSL have been derived and excellent agreement is found between their predictions and experimental results for configurations incorporating uniform-period and chirped-period gratings. For symmetrical grating structures, it is found that the FBGSL time delay response is similar to that of the incorporated grating; with asymmetrical gratings, the FBGSL response is quite different. It is shown that wavelength-division-multiplexing filters exhibiting near-zero dispersion characteristics can be implemented using FBGSLs.

KW - near-constant passband time delay

KW - time delay response

KW - Sagnac loop

KW - filters

KW - fiber Bragg grating

KW - optical filter

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JO - IEEE Photonics Technology Letters

JF - IEEE Photonics Technology Letters

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Near-constant time delay response of fiber grating Sagnac loop filters

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