期刊
OPTICS EXPRESS
卷 21, 期 14, 页码 16621-16628出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.21.016621
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资金
- 973 Programs [2013CB328702, 2013CB632703, 2010CB934101]
- CNKBRSF [2011CB922003]
- NSFC [11174153]
- 111 Project [B07013]
- Natural Science Foundation of Tianjin [12JCQNJC00900]
- International S&T Cooperation Program of China [2011DFA52870]
Based on the evanescent-field coupling between the cladding modes of two adjacent and parallel all-fiber acousto-optic tunable filters, tunable broadband light coupling with relatively uniform insertion loss of trapping spectrum was achieved. In the experiments, a wide spectral tuning range from 1490 nm to 1610 nm, covering the whole C- and L-band and parts of S-bands, was demonstrated with a wavelength tunability slope of-0.72 nm/kHz. The insertion loss of the trapping spectrum was uniform (around -5.0 dB, which can be improved with a longer evanescent-field coupling length) within the whole tuning spectral range. Such a light coupling structure would be useful in tunable broadband light coupler and broadband optical fiber add/drop multiplexer for applications in coarse wavelength division multiplexing systems. (C) 2013 Optical Society of America
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