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Device and method for generating return-to-zero code electro-optical modulation signal

An electro-optical modulation and generation device technology, which is applied in the direction of electrical components, electromagnetic wave transmission systems, transmission systems, etc., can solve problems such as the inability to achieve chirp-free modulation

Inactive Publication Date: 2012-08-15
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another disadvantage is that strict chirp-free modulation cannot be achieved

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  • Device and method for generating return-to-zero code electro-optical modulation signal
  • Device and method for generating return-to-zero code electro-optical modulation signal
  • Device and method for generating return-to-zero code electro-optical modulation signal

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Embodiment Construction

[0030] The following describes the present invention in detail with reference to the drawings and embodiments, but the protection scope of the present invention should not be limited by this.

[0031] See first figure 1 , figure 1 It is a schematic diagram of the structure of the device for generating a return-to-zero code electro-optic modulation signal of the present invention. As shown in the figure, a device for generating a return-to-zero code electro-optic modulation signal based on a micro-ring cavity includes a micro-ring resonance based on an add-drop multiplexing structure Cavity 1. The microring resonant cavity 1 and the input straight waveguide 2 are coupled through a first coupler 6 to form an input coupling region 4, and the microring resonant cavity 1 and the output straight waveguide 3 are coupled through a second coupler 7 to form Output coupling area 5.

[0032] The first coupler 6 and the second coupler 7 are respectively composed of Mach-Zehnder interferometers....

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Abstract

The invention discloses a device and a method for generating a return-to-zero code electro-optical modulation signal, wherein a micro-ring resonant cavity based on an add / drop multiplex structure is used for generating a chirp-free return-to-zero code signal through electro-optical modulation. The method comprises the following steps of: generating a return-to-zero phase-shift keying modulation signal by loading a unipolar clock signal in an input coupling area and loading a bipolar non-return-to-zero signal in an output coupling area; generating a carrier suppression return-to-zero modulation signal by loading a bipolar clock signal in the input coupling area and loading a unipolar non-return-to-zero signal in the output coupling area; and generating return-to-zero amplitude modulation signal by loading the unipolar clock signal in the input coupling area and loading the unipolar non-return-to-zero signal in the output coupling area.

Description

Technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a device and method for generating a return-to-zero code electro-optical modulation signal based on a microring resonant cavity. Background technique [0002] Return-to-zero code (referred to as RZ code) is an important modulation code type in optical fiber transmission systems. Compared with non-return-to-zero codes (referred to as NRZ), RZ codes are more robust to inter-symbol interference and nonlinear transmission distortion. In recent years, microring resonators have received more and more attention as modulators in the field of integrated optoelectronics. By changing the refractive index of the micro-ring waveguide or the coupling coefficient between the micro-ring and the waveguide, the micro-ring modulator is used for modulation in NRZ or phase shift keying (PSK for short) and has been implemented. However, there are few studies on the use of microrings f...

Claims

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Application Information

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IPC IPC(8): H04B10/155H04B10/516
Inventor 叶通孙丽丽周林杰陈建平
Owner SHANGHAI JIAO TONG UNIV
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