期刊
OPTICS LETTERS
卷 34, 期 20, 页码 3116-3118出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.34.003116
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资金
- Czech Science Foundation [GA102/07/0999]
- Natural Sciences and Engineering Research Council (NSERC) of Canada
We report the fabrication of a pi-phase-shifted long-period fiber grating (LPFG) capable of operating as a terahertz-bandwidth second-order temporal differentiator. We demonstrate its operation experimentally by differentiating subpicosecond long optical pulses. A new scheme for achieving high-order photonic temporal differentiation based on LPFG filters is also proposed and demonstrated. In particular, we prepared a LPFG-based first-order differentiator that was frequency and bandwidth matched to the second-order device and demonstrated the cascadability of these devices leading to the implementation of a third-order differentiator. By also employing these devices in reflection, up to the fifth-order differentiation is demonstrated experimentally. (C) 2009 Optical Society of America
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