Optical signal replicating system

A technology of optical signal and level light, which is applied in the selection device of multiplexing system, the coupling of optical waveguide, electrical components, etc., and can solve the problems of large noise crosstalk and large polarization state influence

Inactive Publication Date: 2008-03-12
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

[0009] The present invention proposes a new optical signal duplication system aiming at the problems of large noise crosstalk and great influence on polarization state existing in the existing active duplication technology. Narrow-band optical filtering technology can effectively reduce the total amount of noise in the loop and eliminate the influence of polarization state

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Embodiment Construction

[0061] As shown in FIG. 1 , the block diagram of the optical signal duplication system of the present invention, the electronic switch 2 adopts a dual 4-way analog electronic switch with a switch response time of 25 ns to intercept the original electrical signal from the signal source 1. The 1550nm light source 3 adopts a directly modulated distributed feedback laser with a center wavelength of 1550.9nm, a -3dB spectral line width of 0.15nm, an input amplitude of 100mV to 1V in the linear region, a dynamic single longitudinal mode range of GHz, and a third-order intermodulation CTB of -60dB, used to generate the original optical signal under the modulation of the original electrical signal source 1. The 10us level optical switch 4 adopts the magneto-optical effect, the center wavelength is 1550nm, and the switch response speed is 15us, which is used to control the action time of the 1550nm light source 3 . The 3dB coupler 7 has a central wavelength of 1550nm and an insertion l...

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Abstract

The invention relates to a light signal duplication system. The invention is a new light signal active duplication system, and the invention is mainly characterized in that a light amplification mechanism with low noise factor and low magnitude ratio is adopted, and the narrow band light filtering technology is integrated. The effect of the light amplification with low noise factor is obtained through the optimization design of the erbium doped fiber amplification mechanism, and the remarkable function is to reduce the accumulation speed of reducing the noise; the further integration of the narrow band narrow band light filtering can effectively suppress the accumulated amplification of the self radiation noise generated during the magnitude ratio process of the erbium doped fiber, and the total noise quantity in the loop is reduced; the adoption of the erbium doped fiber is advantageous to the elimination of the influence of the polarization state. Through the implementation of the methods, the deficiencies that the noise crosstalk interference existing in the current active duplication technology is large, and the polarization state influence is large are effectively solved.

Description

technical field [0001] The invention relates to an optical signal processing system, in particular to an optical signal duplication system. Background technique [0002] Optical signal replication technology is used to convert a single optical signal into the same type of optical signal sequence with specific time domain distribution and intensity distribution. Compared with high-speed electrical pulse signal replication technology, due to the transmission characteristics of optical fiber with broadband, low loss and low dispersion, It can obtain a much larger delay time-bandwidth product than electrical signal delay media such as coaxial cables, charge-coupled devices, and surface acoustic wave devices, and the use of optical carriers can achieve high-precision replication of shorter pulses. In addition, due to the excellent electromagnetic compatibility and anti-interference ability of optical fiber transmission, the delayed replication of signals by optical means is safe ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00G02B6/24
Inventor 陈抱雪傅长松杨臻明张建彬
Owner UNIV OF SHANGHAI FOR SCI & TECH
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