Configurable optical signal all-optical edge detection system

Abstract

The invention discloses a configurable optical signal all-optical edge detection system. The system comprises a first erbium-doped fiber amplifier which is used for amplifying the power of a pump optical signal, a tunable optical attenuator which is used for adjusting the power of the pump optical signal after power amplifying, a first fiber delay line and a second fiber delay line. The first andsecond fiber delay lines are used for adjusting the relative delay amount of the pump optical signal and a first phase-reversed optical signal, and advancing or delaying the propagation time of the pump optical signal relative to the first phase-reversed optical signal by tau, wherein tau is the transit time of an NRZ optical signal. The system further comprises a wavelength division multiplexer which is used for coupling the pump optical signal and the first phase-reversed optical signal into an optical signal, a highly nonlinear optical fiber which is used for generating a degenerate four-wave mixing nonlinear effect under the action of the coupled optical signal to acquire a first idler light, and a first optical band-pass filter which is used for extracting the first idler light to acquire a first edge pulse. According to the invention, the principle of four-wave mixing is used; delay is introduced between two signals; and a rising edge, a falling edge or double edges can be flexibly acquired.

Description

technical field [0001] The invention belongs to the technical field of all-optical signal processing of high-speed signals and nonlinear optics, and more specifically relates to a configurable all-optical edge detection system for optical signals. Background technique [0002] Optical communication is one of the most important ways of modern information and transmission, and it is moving towards the direction of ultra-high speed, large capacity, large broadband, long distance, and low cost. All-optical edge detection is an all-optical signal processing technology used to detect the rising and falling edges of non-return to zero (NRZ) signals, which can be used as trigger signals, enable signals or The rate used to detect optical signals. The all-optical signal processing based on four-wave mixing has a response speed of femtosecond level, which can meet the signal processing of tens of G or even hundreds of G. Moreover, four-wave mixing can realize wavelength conversion, a...

AI Technical Summary

Problems solved by technology

[0005] In view of the defects of the prior art, the purpose of the present invention is to solve the technical problem that the existing all-optical signal edge detection method system cannot flexibly detect the rising edge, falling edge or two edges of the NRZ optical signal

Images