期刊
OPTICS LETTERS
卷 38, 期 16, 页码 3096-3098出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.38.003096
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资金
- National Natural Science Foundation of China [61101053]
- 973 Project [2012CB315704]
- Program for New Century Excellent Talents in University of China [NCE-12-0940]
- Science and Technology on Electronic Information Control Laboratory
- Natural Science and Engineering Research Council of Canada (NSERC)
Optical filters with an ultranarrow and rectangular spectral response are highly desired for high-resolution optical/electrical signal processing. An all-fiber optical filter based on a fiber Bragg grating with a large number of phase shifts is designed and fabricated. The measured spectral response shows a 3 dB bandwidth of 650 MHz and a rectangular shape factor of 0.513 at the 25 dB bandwidth. This is the narrowest rectangular bandpass response ever reported for an all-fiber filter, to the best of our knowledge. The filter has also the intrinsic advantages of an all- fiber implementation. (C) 2013 Optical Society of America
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