| Diversity of photonic differentiators based on flexible demodulation of phase signals |
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| 作者姓名： | 郑傲凌 董建绩 雷蕾 杨婷 张新亮 |
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| 基金项目： | Project supported by the National Basic Research Program of China(Grant No.2011CB301704);the Program for New Century Excellent Talents in Universities of China(Grant No.NCET-11-0168);the Foundation for the Author of National Excellent Doctoral Dissertation of China(Grant No.201139);the National Natural Science Foundation of China(Grant Nos.60901006 and 11174096) |
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| 摘 要： | We theoretically propose a multifunctional photonic differentiation （DIFF） scheme based on phase demodulation using two cascaded linear filters. The photonic D1FF has a diversity of output forms, such as the 1 st order intensity DIFF, the 1 st order field DIFF and its inversion, and the 2nd-order field DIFF, depending on the relative shift between the optical carrier and the filter＇s resonant notches. As a proof, we also experimentally demonstrate the DIFF diversity using a phase modulator and two delay interferometers （Dis）. The calculated average deviation is less than 7% for all DIFF waveforms. Our schemes show the advantages of flexible DIFF functions and forms, which may have different optical applications. For example, high order field differentiators can be used to generate complex temporal waveforms, and intensity differentiators are useful for the ultra-wideband pulse generation.
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| 关 键 词： | 相位解调 多样性 相位信号 光子 线性滤波器 相位调制器 超宽带脉冲 输出形式 |
Diversity of photonic differentiators based on flexible demodulation of phase signals |
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| Abstract: | We theoretically propose a multifunctional photonic differentiation(DIFF) scheme based on phase demodulation using two cascaded linear filters. The photonic DIFF has a diversity of output forms, such as the 1st order intensity DIFF,the 1st order field DIFF and its inversion, and the 2nd-order field DIFF, depending on the relative shift between the optical carrier and the filter's resonant notches. As a proof, we also experimentally demonstrate the DIFF diversity using a phase modulator and two delay interferometers(DIs). The calculated average deviation is less than 7% for all DIFF waveforms.Our schemes show the advantages of flexible DIFF functions and forms, which may have different optical applications. For example, high order field differentiators can be used to generate complex temporal waveforms, and intensity differentiators are useful for the ultra-wideband pulse generation. |
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| Keywords: | photonic differentiator pulse shaping microwave photonics |
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