Circuit, device and method of detecting optical signal to noise ratio
A technology of optical signal-to-noise ratio and detection circuit, which is applied in the field of optical communication and can solve problems such as the inability to realize optical signal-to-noise ratio detection
Inactive Publication Date: 2016-05-25
ZTE CORP
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[0004] The main purpose of the present invention is to provide an optical signal-to-noise ratio detection circuit, device and method, aiming to solve the problem that the traditional interpolation method cannot realize the optical signal-to-noise ratio detection in high-speed optical transmission systems
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[0057] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0058] The invention provides an optical signal-to-noise ratio detection circuit, which is applied to a high-speed optical transmission system.
[0059] refer to Figure 1 to Figure 3 , a functional block diagram of a preferred embodiment of the optical signal-to-noise ratio detection circuit of the present invention; figure 2 It is a schematic diagram of the waveform of the optical signal with the top adjustment signal in the optical signal-to-noise ratio detection circuit of the present invention; image 3 It is a schematic diagram of the waveform of the optical signal with the top-tuned signal and ASE noise in the optical signal-to-noise ratio detection circuit of the present invention.
[0060] In a preferred embodiment of the present invention, the optical signal-to-noise ratio detection circuit includes an op...
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The invention discloses a circuit for detecting an optical signal to noise ratio, which comprises an optical switch, a tunable optical filter, a photoelectric conversion module, a top modulation signal conditioning module and a control module, wherein after the photoelectric conversion module converts to-be-detected optical signals into voltage signals, the modulation signal top conditioning module separately amplifies AC signals and DC signals in the voltage signals and correspondingly converts the signals into two paths of digital signals, the modulation depth of the top modulation signal and the modulation depth of ASE (Amplified Spontaneous Emission) noise are determined according to the two paths of digital signals, and the optical signal to noise ratio of the optical signals is calculated. The invention also discloses a device for detecting the optical signal to noise ratio, which comprises an optical forwarding unit, an optical amplifying unit and the optical signal to noise ratio detecting circuit. The invention also discloses an optical signal to noise ratio detecting method applied to the optical signal to noise ratio detecting device. The optical signal to noise ratio of each path of accessed optical signals can be accurately detected, and the circuit, the device and the method of the invention are applied to a high-speed optical transmission system and solve the problem that the traditional interpolation method can not realize the optical signal to noise ratio detection in the high-speed optical transmission system.
Description
technical field [0001] The invention relates to the technical field of optical communication, in particular to an optical signal-to-noise ratio detection circuit, device and method. Background technique [0002] DWDM (DenseWavelengthDivisionMultiplexing, Dense Wavelength Multiplexing) can combine a group of optical wavelengths and transmit them with one optical fiber. This is a laser technology used to increase bandwidth over existing fiber optic backbones. OSNR (OpticalSignaltoNoiseRatio, Optical Signal to Noise Ratio) in the wavelength division multiplexing system is a key performance parameter for measuring the optical wavelength division multiplexing system. The definition of optical signal-to-noise ratio is the ratio of optical signal power to noise power within an optical effective bandwidth of 0.1nm. [0003] As the transmission rate of the wavelength division multiplexing system continues to increase, the measurement of the optical signal-to-noise ratio is becoming...
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IPC IPC(8): G01R29/26
CPCH04B10/07953H04B10/07H04B10/548H04Q11/0005H04Q11/0062H04Q2011/0018H04Q2011/0039H04Q2011/0083
Inventor 龚雅栋
Owner ZTE CORP