High speed optical transmission system and method based on FSK (Frequency Shift Keying)-D8PSK (Differential Eight Phase Shift Keying)-ASK (Amplitude Shift Keying)-PolMUX (multiplexer)

A fsk-d8psk-ask-polmux, optical transmission technology, applied in the field of optical communication, can solve problems such as insufficient utilization, and achieve the effect of improving frequency band utilization and high spectrum utilization

Inactive Publication Date: 2012-01-04
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, other parameters of the optical signal are not fully utilized, and there is a certain limit to the improvement of spectrum utilization.

Method used

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  • High speed optical transmission system and method based on FSK (Frequency Shift Keying)-D8PSK (Differential Eight Phase Shift Keying)-ASK (Amplitude Shift Keying)-PolMUX (multiplexer)
  • High speed optical transmission system and method based on FSK (Frequency Shift Keying)-D8PSK (Differential Eight Phase Shift Keying)-ASK (Amplitude Shift Keying)-PolMUX (multiplexer)
  • High speed optical transmission system and method based on FSK (Frequency Shift Keying)-D8PSK (Differential Eight Phase Shift Keying)-ASK (Amplitude Shift Keying)-PolMUX (multiplexer)

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[0043] In order to make the object, technical solution, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0044] The present invention provides a high-speed optical transmission system and method based on FSK-D8PSK-ASK-PolMUX. In the system, the sending device uses FSK modulation module, ASK modulation module, D8PSK modulation module and polarization multiplexing module to generate super-orthogonal modulation Signal; the receiving end uses polarization beam splitter, coupler and FSK demodulation module, ASK demodulation module, D8PSK demodulation module to realize the parallel demodulation of each channel of information. The method proposed by the invention improves the spectrum utilization rate of the system.

[0045] image 3 Schematic diagram of the FSK-D8PSK-ASK-PolMUX signal generation method. Figure 4 It is a schematic diagram of the combination m...

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Abstract

The invention provides a high speed optical transmission system and method based on FSK (Frequency Shift Keying)-D8PSK (Differential Eight Phase Shift Keying)-ASK (Amplitude Shift Keying)-PolMUX (multiplexer). A sending device in the system includes the generation of an FSK-D8PSK-ASK-PolMUX signal. The method comprises the following steps: firstly, generating two paths of optical carriers by using two lasers with a 40G frequency difference, and generating two paths of FSK modulating signals at an orthogonal polarization state by using a polarization beam splitter, an M-Z interferometer and the like; then, carrying out D8PSK modulation on the FSK modulating signals respectively by using cascaded three phase modulators on an upper branch and a lower branch; then carrying out ASK modulation on the FSK-D8PSK modulating signals by using an MZM (Mach-Zehnder) modulator; and finally, combining the two paths of modulated signals by a coupler and sending to a transmission link device for transmission. The link device can amplify the received modulated optical signal, and then the optical signal is uploaded to a far-end receiving end; after the receiving device can de-polarize and multiplex the received optical signal, ASK, FSK and D8PSK parallel modulation is carried out on the optical signal so as to recover a transmitted information sequence.

Description

technical field [0001] The invention relates to optical communication technology, in particular to a high-speed optical transmission system and method based on FSK-D8PSK-ASK-PolMUX. Background technique [0002] With the advent of the Internet age, people's demand for information is increasing day by day. Due to the advantages of large bandwidth resources and low manufacturing cost, optical communication technology makes optical transport network the basis of next-generation broadband communication network, and as an important supporting platform for information transmission technology, it will play a very important role in the future information society . With the continuous evolution of communication technology and the emergence of new business blowouts, people have put forward higher and higher requirements for the bandwidth and capacity of communication networks, and optical communication systems are moving towards higher speed, higher transmission capacity and longer t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/12H04Q11/00H04L27/32H04B10/25H04J14/02
Inventor 张丽佳刘博张琦王拥军刘皎王凯民忻向军
Owner BEIJING UNIV OF POSTS & TELECOMM
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