Device and method for measuring quality factor of homology sampling

Abstract

A same-type sampling quality factor measuring device and method is used for real-time monitoring optical signal quality in optical network, and the quality is assessed by the quality factor, and the device using laser diode with wavelength converter to obtain the same-type wavelength and amplify the optical signal, and using laser diode with optical switch to obtain sampling optical pulse, and therefore, after access to photoelectric converter, the optical signal is amplified and coupled with the optical pulse to rebuild the basic frequency signal of the optical signal, thereby to detect the quality factor, and monitor optical signal quality.

Description

technical field [0001] The present invention relates to a device and method for measuring the quality of an optical signal, which is used in a monitoring system of an optical network to detect the quality factor (Q-factor) of the optical signal and evaluate the bit error rate (bit) of the optical signal. error rate, BER). Background technique [0002] Driven by the trend of high-speed optical network / all-optical network, the transmission rate has increased to megabits per second and the transmission distance has become farther and farther. When optical signals are transmitted in channels, there are quite a few factors that will affect the quality of data transmission. Therefore, it is necessary to establish a good optical signal quality monitoring system, so as to effectively manage the optical network and improve performance. However, in addition to the gradual reduction of traditional electricity nodes, the electricity network performance monitors with traditional electri...

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Problems solved by technology

[0017] The coherence detection module of the prior art, for example, US Patent No. US2005 / 0185255 A1 published on August 25, 2005, its quality factor monitoring technology consists of a wavelength tunable optical pulse laser (wavelength tunable) with the same wavelength as the measured optical signal Optical pulse laser) and the optical signal under test are coupled into the optical receiver together, and the optical pulse (optical pulse) output by this wavelength-tunable optical pulse laser replaces the above-mentioned continuous light to amplify and sample the signal, and the part with the same wavelength is obtained by A wide-band optical frequency-locked loop is implemented. However, although this architecture can achieve quality factor monitoring, the complexity and equipment cost are quite high, and when operating at high frequencies, it is not easy for the wide-band optical frequency-locked loop to achieve the function of optical signal phase coherence.

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