CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Magneto-Optic Fiber Gratings Useful for Dynamic Dispersion Management and Tunable Comb Filtering |
WU Bao-Jian, LU Xin, QIU Kun |
Key Lab of Broadband Optical Fiber Transmission and Communication Networks of the Ministry of Education, University of Electronic Science and Technology of China, Chengdu 611731 |
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Cite this article: |
WU Bao-Jian, LU Xin, QIU Kun 2010 Chin. Phys. Lett. 27 067803 |
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Abstract Intelligent control of dispersion management and tunable comb filtering in optical network applications can be performed by using magneto-optic fiber Bragg gratings (MFBGs). When a nonuniform magnetic field is applied to the MFBG with a constant grating period, the resulting grating response is equivalent to that of a conventional chirped grating. Under a linearly nonuniform magnetic field along the grating, a linear dispersion is achieved in the grating bandgap and the maximal dispersion slope can come to 1260 ps/nm2 for a 10-mm-long fiber grating at 1550 nm window. Similarly, a Gaussian-apodizing sampled MFBG is also useful for magnetically tunable comb filtering, with potential application to clock recovery from return-to-zero optical signals and optical carrier tracking.
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Keywords:
78.20.Ls
42.79.Dj
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Received: 08 December 2009
Published: 25 May 2010
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