发明名称 |
Apparatus and method for performing electrically band-limited optical differential phase shift keying modulation |
摘要 |
The present invention relates to an apparatus and method for performing optical Differential Phase Shift Keying (DPSK) modulation, which transmits a phase difference between adjacent bits as information. The electrically band-limited optical DPSK modulating apparatus includes a light source, a Non-Return-to-Zero (NRZ) signal generator, a pre-coder, an electrical low pass filter, and a phase modulator. The NRZ signal generator generates a NRZ signal. The pre-coder codes the NRZ signal generated by the NRZ signal generator into a differential signal. The low pass filter electrically limits a bandwidth of the differential signal obtained through the pre-coder. The phase modulator modulates an optical signal input from the light source into a DPSK signal using the differential signal having the bandwidth electrically limited by the low pass filter.
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申请公布号 |
US2005135816(A1) |
申请公布日期 |
2005.06.23 |
申请号 |
US20040892890 |
申请日期 |
2004.07.15 |
申请人 |
HAN JIN S.;JANG YOUN S.;LEE HYUN J. |
发明人 |
HAN JIN S.;JANG YOUN S.;LEE HYUN J. |
分类号 |
G02F1/01;G02F1/21;G02F1/225;(IPC1-7):G02F1/00 |
主分类号 |
G02F1/01 |
代理机构 |
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主权项 |
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地址 |
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