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Zero-Chirp Return-to-Zero Pulses Generation with Two Single-Driver z-Cut Mach--Zehnder Modulators |
QIN Xi1,2;CAO Ji-Hong1,2;ZHANG Feng1,2;WANG Mu-Guang1,2;ZHANG Jian-Yong1,2;JIAN Shui-Sheng 1,2 |
| 1Key Lab of All Optical Network and Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 1000442Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044 |
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| Cite this article: |
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QIN Xi, CAO Ji-Hong, ZHANG Feng et al 2007 Chin. Phys. Lett. 24 3431-3434 |
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Abstract A novel method is proposed to suppress the frequency chirp of single-driver z-cut Mach--Zehnder modulators. Theoretical analysis shows that by multiplying the output pulses of a half clock frequency driving single-driver z-cut modulator with the one delayed odd multiple bit duration, the frequency chirp can be removed entirely, and return-to-zero (RZ) pulses with duty cycles of about 25% and 56% are obtained. An experimental scheme is proposed to validate the proposed method. The experimental results show that perfect 40GHz zero-chirp RZ pulses can be obtained by using this scheme.
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| Keywords:
42.65.Re
42.79.Hp
42.60.Fc
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Received: 18 April 2007
Published: 03 December 2007
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| PACS: |
42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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42.79.Hp
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(Optical processors, correlators, and modulators)
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42.60.Fc
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(Modulation, tuning, and mode locking)
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