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Full optical code type conversion apparatus

A conversion device and optical code technology, applied in the coupling of optical waveguides, etc., can solve the problems of high cost, increased cost, and low applicable speed, and achieve the effects of cost economy, noise reduction, and simple structure

Inactive Publication Date: 2006-06-14
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This greatly increases the cost of the device
[0004] In short, the existing all-optical code conversion device has a series of problems such as complex structure, high cost, and low applicable rate, which will severely restrict the performance of future high-speed all-optical networks.

Method used

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  • Full optical code type conversion apparatus
  • Full optical code type conversion apparatus
  • Full optical code type conversion apparatus

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Embodiment Construction

[0012] As shown in Figure 1, the present invention comprises optical coupler 1, polarization maintaining fiber (PMF) 2 and polarization controller (PC) 3, and polarization maintaining fiber 2 and polarization controller 3 are respectively connected at two output ports of optical coupler , forming a closed loop. The optical coupler 1 is an ordinary two-port input and two-port output optical coupler, and the splitting ratio of the two ports has no special requirements; the polarization-maintaining fiber 2 can be any type of polarization-maintaining fiber, and its length is not limited. Different lengths of polarization-maintaining fibers correspond to Depending on the conversion rate, the shorter the length of the polarization-maintaining fiber corresponds to the higher rate of code conversion. The polarization controller 3 can simultaneously change the polarization state and phase of light waves.

[0013] The NRZ optical signal enters the code conversion device through the inp...

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Abstract

The invention discloses an entire optical code transition device that includes optical coupler, polarization maintaining optical fiber and polarization controller. The NRZ signal needed to transform is input from one interface of the optical coupler, and the polarization controller would gain the PRZ signal after being transformed from the other end. The invention has no code pattern effect, and is simple structure and low cost.

Description

technical field [0001] The invention belongs to the technical field of optical devices, specifically a code conversion device based on a polarization-maintaining fiber optic loop mirror, which is suitable for high-speed optical communication systems and can solve the problem of converting non-return-to-zero (NRZ) signals to pseudo-return-to-zero signals in the system. All-optical conversion of coded (PRZ) signals. Background technique [0002] It is a global research hotspot to build a higher-speed, larger-capacity optical communication network. To achieve higher transmission rate and larger transmission capacity, the main technologies used at present are Dense Wavelength Division Multiplexing (DWDM) technology and Optical Time Division Multiplexing (OTDM) technology. In DWDM networks with relatively low rates (such as 10Gbit / s), the modulation format of non-return-to-zero (NRZ) codes is generally used, because compared with return-to-zero codes (RZ) codes, NRZ codes are si...

Claims

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Application Information

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IPC IPC(8): G02B6/27
Inventor 张新亮徐帆黄德修余宇刘德明
Owner HUAZHONG UNIV OF SCI & TECH