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Optical signal to noise ratio (OSNR) monitoring device and monitoring method

An optical signal-to-noise ratio and monitoring device technology, applied in the field of optical communication, can solve problems such as limited sensitivity and range, and achieve the effect of improving monitoring sensitivity and increasing monitoring range

Inactive Publication Date: 2011-06-08
BEIJING UNIV OF POSTS & TELECOMM
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  • Application Information

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Problems solved by technology

Benjamin J.Eggleton et al. from the University of Melbourne in Australia published a paper [1], which proposed an in-band optical signal-to-noise ratio monitoring technology, which has limited sensitivity and range.

Method used

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  • Optical signal to noise ratio (OSNR) monitoring device and monitoring method
  • Optical signal to noise ratio (OSNR) monitoring device and monitoring method
  • Optical signal to noise ratio (OSNR) monitoring device and monitoring method

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Embodiment Construction

[0029] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] like figure 1 As shown, the optical signal-to-noise ratio monitoring device of the present invention includes: an optical amplifier 1, a first polarization control element 2, a circulator 3, a coupler 4, a nonlinear optical element 5, an attenuator 6, and a second polarization control element 7 , the first power meter 8 and the second power meter 9,

[0031] The output end of the optical amplifier 1 is connected to the first polarization control element 2, the output end of the first polarization control element 2 is connected to the first port of the circulator 3, and the second port and the third port of the circulator 3 are respectively connected to the first po...

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Abstract

The invention discloses an optical signal to noise ratio (OSNR) monitoring device and monitoring method, comprising an optical amplifier (1), a first polarization control element (2), a circulator (3), a coupler (4), a nonlinear optical element (5), an attenuator (6), a second polarization control element (7), a first power meter (8) and a second power meter (9). The invention further discloses an OSNR monitoring method using the device, comprising the following steps: optimizing the polarization control elements to obtain working conditions of the linear area of the device; describing the power transmittance ratio of a transmission end to a reflection end of the monitoring device; fitting the relation between an OSNR and an output power by using a least square method; and back-calculating the OSNR by the output power according to the relation. The device and method disclosed by the invention are suitable for high-speed optical communication system. The device and method are compared with the prior scheme, the flexibility and monitoring range are improved obviously.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an optical signal-to-noise ratio monitoring device and a monitoring method. Background technique [0002] In optical communication networks, in order to ensure good service quality, the importance of optical performance monitoring becomes more and more prominent. The monitoring technology of optical signal to noise ratio is one of the key technologies, because the bit error rate of signal reception directly depends on the optical signal to noise ratio (OSNR). In a wavelength division multiplexing system (WDM), the amplified spontaneous emission noise (ASE) in the signal bandpass accumulates continuously with the use of optical amplifiers. Outside the band pass, it is filtered multiple times. With the introduction of add-drop multiplexing equipment (ROADM), different channels will experience different times of multiplexing, demultiplexing and routing, and the noise...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/08H04B10/075
Inventor 伍剑李兰兰李靖达吴冰冰殷座山戴一堂郭宏翔李岩徐坤左勇洪小斌林金桐
Owner BEIJING UNIV OF POSTS & TELECOMM
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