A Method for Measuring Dispersion of Semiconductor Optical Amplifier

Abstract

The invention discloses a method for measuring dispersion of a semiconductor optical amplifier. The method includes the following steps of measuring a gain value corresponding to each wavelength of input light, wherein a turable laser serves as a light source, and gain obtained by the input light of each wavelength after the input light passes an SOA is read through a light power meter; dispersion of the SOA is calculated through gain, wherein the relationship between dispersion and gain is derived according to the definition of dispersion, and a corresponding dispersion value is calculated. The method for measuring dispersion of the semiconductor optical amplifier is simple and easy to operate, an experiment system is concise, dispersion of the SOA can be conveniently measured by means of the method, and the method has great significance and practical value for researching work characteristics of the SOA and optimizing an optical communication system.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a method for measuring the dispersion of a semiconductor optical amplifier (SOA) Background technique [0002] Due to its own superiority, optical communication technology has gradually become the main transmission technology in the communication network. The signals transmitted in the optical communication system are usually signals with a certain bandwidth. When such signals are transmitted in a dispersive medium, dispersion phenomena may occur. In the communication system, adjacent pulses may be superimposed, causing intersymbol interference, and degrading the performance of the optical communication system. Moreover, as the transmission rate increases, the signal spectrum width increases continuously, and the pulse broadening caused by dispersion also increases rapidly. It can be seen that dispersion is an important parameter in the communication system. [0...

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Problems solved by technology

For the convenience of research, GovindP.Agrawal et al. had assumed the dispersion value of SOA at first, but it was later verified that the assumed value was incorrect

Patrick Runge and others calculated the dispersion of SOA in the range of 1300nm to 1800nm, and analyzed the influence of carrier concentration and temperature on the dispersion, but only reported the numerical calculation results, no related experimental research results

Katie L.Hall and others have measured the dispersion of V-groove semiconductor lasers with a wavelength near 1550nm, but the measured waveguide dispersion is not suitable for the current non-resonant structure of SOA

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