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OSNR (Optical Signal to Noise Ratio) monitoring device for wavelength division multiplexing system and method

A wavelength division multiplexing, optical signal-to-noise ratio technology, applied in the field of optical communication

Active Publication Date: 2012-07-18
ZTE CORP
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Problems solved by technology

[0005] Embodiments of the present invention provide an optical signal-to-noise ratio (OSNR) monitoring device and method for a wavelength division multiplexing system to solve the OSNR monitoring problem of an existing high-speed wavelength division multiplexing system

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  • OSNR (Optical Signal to Noise Ratio) monitoring device for wavelength division multiplexing system and method

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Embodiment Construction

[0027] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0028] The embodiment of the present invention utilizes the combination of the wavelength label technology and the traditional OPM technology to realize the OSNR monitoring of the high-speed wavelength division multiplexing system, wherein the wavelength label technology can refer to the Chinese post and telecommunications industry standard YD / T 2003-2009 "reconfigurable optical division Appendix D of "Technical Requirements for Insertion and Multiplexing (ROADM) Equipment" introduces the wavelength trace monitoring (wavelength tag) technology in ROADM applications. At the so...

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Abstract

The invention provides an OSNR (Optical Signal to Noise Ratio) monitoring device for a wavelength division multiplexing system and an OSNR monitoring method. The device comprises a wavelength label analysis unit, an optical performance monitoring unit and an OSNR computing unit, wherein the wavelength label analysis unit is used for receiving a monitoring optical signal provided by the wavelength division multiplexing system, obtaining the signal power of a channel in which each wavelength signal in the monitoring optical signal is positioned and transmitting the signal power to the OSNR computing unit; the optical performance monitoring unit is used for receiving the monitoring optical signal provided by the wavelength division multiplexing system, obtaining the total power of the channel in which each wavelength signal in the monitoring optical signal is positioned and transmitting the total power to the OSNR computing unit; and the OSNR computing unit is used for obtaining the OSNR of the wavelength division multiplexing system according to the signal power and the total power of each channel transmitted by the wavelength label analysis unit and the optical performance monitoring unit. With the adoption of the technical scheme, the OSNR monitoring of the wavelength division multiplexing system can be realized.

Description

technical field [0001] The invention relates to optical communication technology, in particular to an optical signal-to-noise ratio (OSNR) monitoring device and method of a wavelength division multiplexing system. Background technique [0002] The Optical Signal to Noise Ratio (OSNR) of the WDM system is a key parameter to measure the transmission performance of the WDM system, defined as the signal power of the channel divided by the noise power within 0.1nm at the signal wavelength. With the development of the single-wavelength rate of the wavelength division multiplexing system to 40Gb / s and above, the monitoring of OSNR becomes more and more difficult. The traditional method is realized by interpolation, that is, the noise power outside the signal spectrum is first monitored, and then the noise power at the signal wavelength is obtained by the interpolation formula, and finally the OSNR is calculated. The interpolation method can well meet the OSNR monitoring of single-...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/08H04B10/071H04B10/079
CPCH04J14/0275H04B10/0775H04J14/02H04J14/0221
Inventor 沈百林华锋
Owner ZTE CORP
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