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Hybrid fiber grating-based optical comb filters

Published: 29 July 2008 Publication History

Abstract

In-fiber Mach-Zehnder interferometer filters, which were based on a pair of long-period fiber gratings (LPFGs), have been operated in the reflection mode by interacting with an optical fiber mirror reflector or a chirped-fiber Bragg grating (CFBG). As a result, the extinction ratio has been doubly enhanced. Furthermore, by tuning the chirp rate, i.e. reflection bandwidth of the CFBG, the channel number of the formed comb filter can be easily changed. A 3 to 9-channel comb filter with a channel spacing of 2.45 nm has been demonstrated experimentally.

References

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Lee, B. H., and Nishii, J. 1999. Dependence of fringe spacing on the grating separation in a long-period fiber grating pair. Appl. Opt. 38. 16. 3450--3459.
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Jeong, Y., Baek, S., and Lee, B. 2000. All-optical signal gating in cascaded long-period fiber gratings. IEEE Photon. Technol. Lett. 12. 9. 1216--1218.
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Han, Y.-G., Kim, S. H., and Lee, S. B. 2004. Flexibly tunable multichannel filter and bandpass filter based on long-period fiber gratings. Opt. Express. 12. 9. 1902--1907.
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Dong, Xinyong, Yang, X., Shum, P., and Chan, C. C. 2005. Tunable WDM filter with 0.8-nm channel spacing using a pair of long-period fiber gratings. IEEE Photon. Technol. Lett. 17. 4. 795--797.
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Dong, Xinyong, Su, L., Shum, P., Chung, Y., and Chan, C. C. 2006. Wavelength-selective all-fiber filter based on a single long-period fiber grating and a misaligned splicing point. Optics Commun. 258. 2. 159--163.
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  1. Hybrid fiber grating-based optical comb filters

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    ICAIT '08: Proceedings of the 2008 International Conference on Advanced Infocomm Technology
    July 2008
    677 pages
    ISBN:9781605580883
    DOI:10.1145/1509315
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    Publication History

    Published: 29 July 2008

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    Author Tags

    1. fiber Bragg gratings
    2. fiber lasers
    3. interferometers
    4. optical filters

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    ICAIT '08 Paper Acceptance Rate 89 of 151 submissions, 59%;
    Overall Acceptance Rate 122 of 207 submissions, 59%

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