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Dynamic reconfigurable multi-granularity optical buffer for all-optical switching network

An optical buffer, multi-granularity technology, applied in the field of optical communication, can solve the problems of crosstalk, polarization sensitivity, large insertion loss, etc.

Inactive Publication Date: 2005-06-29
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of optical buffer has the characteristics of dynamic reconstruction, but it needs to solve the problems of large insertion loss, polarization sensitivity and crosstalk

Method used

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  • Dynamic reconfigurable multi-granularity optical buffer for all-optical switching network
  • Dynamic reconfigurable multi-granularity optical buffer for all-optical switching network
  • Dynamic reconfigurable multi-granularity optical buffer for all-optical switching network

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: It is intended to delay the buffering of data packets in the optical buffer to 9750×2T.

[0029] The data packet cache delay in the 4-level delay line tree is 9×1000×2T; the delay in the 3-level delay line tree cache is 7×100×2T; the delay in the 2-level delay line tree cache is 5×10×2T; The cache delay is 0 at the level 1 delay line tree. The process that the data packet goes through in the buffer is as attached Figure 5 As indicated by the dotted line, the steps are as follows:

[0030] (1) The data packet is input from the circulator port (1), and first enters the fourth-stage delay line tree through the port (2). At this time, the gain switch S in the delay line tree is 0 , S 1 ', S 2 , S 3 On, the phase shifter P 0 , P 1 ', P 2 On, other gain switches and phase shifters off. The data packet passes through the optical delay line 2000T, then passes through the optical delay line 7000T, passes through the delay line 7000T after returning from t...

Embodiment 2

[0034] Embodiment 2: It is intended to delay the buffering of data packets in the optical buffer to 123×2T.

[0035] The delay of the data packet in the 4-level delay line tree cache is zero; the delay in the 3-level delay line tree cache is 1×100×2T; the delay in the 2-level delay line tree cache is 2×10×2T; the delay in the 1-level delay The line tree cache delay is 3×2T. The process that the data packet goes through in the buffer is as attached Figure 6 As indicated by the dotted line, the steps are as follows:

[0036] (1) The data packet is input from the circulator port (1), and first enters the fourth-stage delay line tree through the port (2). At this time, the gain switch in the delay line tree is only the gain switch S 0 On, other gain switches and phase shifters off. The data packet is directly returned from the TOAD ring to the circulator port (2), output from the port (3), and after being amplified, enters the next stage of the delay line tree. At this time, ...

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Abstract

A full optical exchange net dynamic reconstructive multigrain optical buffer memory based on fiber delay lines and SOA gain optical switch has a read-write speed of nanosecond level to support data packet. The optical buffer memory cascaded by different grains of optical delay line trees, each tree is composed of four optical delay lines with different grains and provides the buffer storage time delay of 10 basic units by combination of two different grains of delay lines to the most, therefore, the optical buffer memory cascaded by two level optical delay line trees can provide the time delay of 100 basic units.

Description

Technical field: [0001] The invention relates to a multi-granularity optical buffer, in particular to the structure of a multi-granularity optical delay line tree. Optical buffering is an essential technology for all-optical packet switching networks, and is a key device for realizing packet header reading, packet synchronization, and solving routing competition, and belongs to the field of optical communication technology. Background technique: [0002] Optical switching / optical routing belongs to the key optical node technology in all-optical networks, and optical switching devices are the basis of optical switching / optical routing. The key to realizing the optical switching system is to develop high-speed optical logic devices, that is, optical read-write devices and storage devices. Optical memory can realize the storage of optical signals. Commonly used optical memories include bistable laser diode optical memories and fiber optic delay lines. The principle of the bi...

Claims

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Application Information

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IPC IPC(8): H04L12/931H04Q11/00
Inventor 杨爱英孙雨南
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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