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FSK signal producing apparatus, method and application

A signal generation and signal technology, applied in the field of optical communication, can solve the problems of poor FSK signal transmission performance, etc., and achieve the effect of compact structure, low bit error rate and less optical components

Inactive Publication Date: 2017-08-04
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] In view of the above-mentioned defects in the prior art, the present invention proposes a FSK signal generating device, which aims to solve the technical problem of poor transmission performance of the FSK signal generated by the existing FSK signal generating device

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  • FSK signal producing apparatus, method and application
  • FSK signal producing apparatus, method and application
  • FSK signal producing apparatus, method and application

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[0042] 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 in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0043] figure 1 A schematic structural diagram of an embodiment of an FSK signal generating device provided by the present invention. The FSK signal generating device consists of a first LiNbO 3 MZ modulator, second LiNbO 3 Composed of MZ modulator and Y-shaped waveguide. First LiNbO 3 The output of the MZ modulator is connected to the first input of the Y-shaped waveguide, the second LiNbO 3 The output of the MZ modulator is connected to the second input of the Y-shaped waveguide, when the first LiNbO 3 When the input end of the MZ modulator is fed with the first laser signal, the first LiNb...

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Abstract

Disclosed in the invention are an FSK signal producing apparatus, a method and an application. The apparatus includes a first MZ modulator, a second MZ modulator and a combination unit. By inputting a first control voltage to a control electrode of the first MZ modulator, an output end of the first MZ modulator is enabled to output an inverting modulated optical signal. By inputting a second control voltage to a control electrode of the second MZ modulator, an output end of the second MZ modulator is enabled to output a non-inverting modulated optical signal. Combination of the non-inverting modulated optical signal and the inverting modulated optical signal is realized by the combination unit, thus the output of an FSK signal is realized. The apparatus utilizes a small number of optical devices, has a compact structure and greatly simplifies the structure of an FSK modulator. In addition, the FSK signal producing apparatus is directly driven by data signals which do not include sinusoidal signals, which can avoid performance and speed limitations for transmission of the FSK signal caused by the frequency of the sinusoidal signals. The produced FSK signal has a good shape of eye pattern in the high speed optical transmission system, and can realize error-free transmission in theory with a low loss and an excellent performance.

Description

technical field [0001] The invention belongs to the field of optical communication, and more specifically relates to a frequency-shift keying (Frequency-shiftkeying, FSK) signal generation device, method and application thereof. Background technique [0002] In the past few years, in order to improve the performance of high-speed optical transmission systems, many advanced modulation formats have been proposed and studied. Among the different modulation formats, the frequency shift keying (FSK) modulation format makes the differential detection scheme possible, and the simulation results show that, in a 10-Gb / s transmission system, FSK is relatively better than differential phase shift keying ( The optical noise ratio performance of DPSK) has been significantly improved. In addition, the combination scheme of quadrature modulation, amplitude shift keying (ASK) and FSK has gained widespread attention due to its advantages of high frequency spectrum, easy detection and good p...

Claims

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Application Information

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IPC IPC(8): H04B10/556
Inventor 罗风光王梓骁杨柳丁博迪胡航听李斌
Owner HUAZHONG UNIV OF SCI & TECH
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