Photoelectric detector ased on dark current compensation and erbium-doped optical fiber amplifier

Abstract

The invention discloses a photoelectric detector based on dark current compensation and an erbium-doped optical fiber amplifier. The photoelectric detector comprises a photoelectric detection circuit, a temperature sensor and a compensation module. The output quantity of the photoelectric detection circuit is output to the compensation module, and the compensation module performs dark current power compensation on an optical power value obtained by fitting the output quantity of the photoelectric detection circuit according to the working temperature obtained by the temperature sensor to obtain detection optical power. The erbium-doped optical fiber amplifier comprises one or more photoelectric detectors, and at least one of the one or more photoelectric detectors is the photoelectric detector based on dark current compensation. According to the invention, dark current power compensation can be realized accurately and conveniently at low cost, and the detection precision of the photoelectric detector in a low detection power range is improved. The optical signal amplifier is high in precision, full in temperature and ultra-wide in photoelectric detection range, and is applied to long-distance communication of a core network and a backbone network.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, and more specifically relates to a photodetector and an erbium-doped fiber amplifier based on dark current compensation. Background technique [0002] With the rapid development of optical communication technology, optical network devices, modules and subsystem products for high-speed communication and data communication applied on optical networks are also gradually developed. The birth of erbium-doped fiber amplifier (EDFA) is a revolutionary breakthrough in the field of optical fiber communication. It makes long-distance, large-capacity, and high-speed optical fiber communication possible. It is also an indispensable important device for DWDM systems, future high-speed systems, and all-optical networks. . [0003] Especially in the construction of core network and backbone network, the in-depth research and application of related technologies of Erbium-doped fiber amplifier (EDFA) is ...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a photodetector and erbium-doped fiber amplifier based on dark current compensation, the purpose of which is to find that the detection error of the photodetector under low power mainly comes from , The dark current phenomenon that cannot be eliminated, through the power compensation of the dark current that changes with the temperature of the photodetector, to improve the accuracy of photoelectric detection, especially under the premise that the operating temperature of the erbium-doped fiber amplifier significantly affects the power of the dark current. Current compensation realizes high-precision, ultra-wide-range photoelectric detection, ensures the working status of EDFA, thereby improving data transmission stability, transmission rate, and reducing bit error rate, thus solving the problems of existing technologies in the low power range (below -50dBm) Interval) ultra-wide-range optical power detection accuracy needs to be further improved, resulting in the technical problem that the signal amplification effect of EDFA in the ultra-wide range cannot be guaranteed

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