Optical A/D converter based on asymmetric Mach-Zehnder modulator |
Title： |
| Optical A/D converter based on asymmetric Mach-Zehnder modulator |
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Application Number： |
200710064139 |
Application Date： |
2007/03/02 |
Announcement Date： |
2007/08/22 |
Pub. Date： |
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Publication Number： |
101021666 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
G02F 7/00 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Wu Qingwei, Zhang Hongming, Yao Minyu |
Key Words： |
Optical A/D converter, asymmetric, Mach-Zehnder modulator |
Abstract： |
The invention is an optical A/D converter based on nonsymmetrical Mach-Zehnder modulator, belonging to the optical A/D converter technical field, characterized in that: it uses nonsymmetrical M-Z modulator to modulate electric signal to synchronous multi-wavelength input pulse, and selects proper length difference of two arms DeltaL and N wavelengths, able to make offset of DC biasing point between every two adjacent wavelengths at the outgoing end bepi/N, and the modulated multi-wavelength optical pulse is divided into N synchronous optical pulses by wavelength division multiplexer, and after determined by photoelectric detector and comparer, it can obtain N digital signal outputs. And the invention can implement very large modulated bandwidth and accurately control the offset of DC biasing point of two adjacent channels, implementing higher-digit A/D conversion and easy to implement. |
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| Last Update |
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2008-4-17 |
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Selected patents owned by Tsinghua University filed in 2005 are loaded. |
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2008-3-31 |
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Selected patents owned by Tsinghua University filed in 2006 and 2007 are load. |
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