Wavelength tuning amount measurement device for high-precision tunable optical filter

Abstract

The invention relates to a wavelength tuning amount measurement device for a high-precision tunable optical filter. With the measurement device adopted, the problems of low sensitivity, low precisionand low stability of measurement results of an existing wavelength tuning amount measurement system can be solved. The measurement device mainly comprises a depolarization ASE broadband light source,a tunable optical filter to be tested, an optical fiber polarizer, an optical modulator control circuit, an intensity type optical modulator, a dispersion optical fiber, a photoelectric detector, a low-noise amplifier, a microwave signal source, a microwave power divider, an IQ mixer and a signal processing and display module. A microwave photonic technology and the dispersion optical fiber are adopted to amplify the change of the phase of the microwaves of optical carriers caused by the change of the wavelength of the optical carriers; and the measurement of the wavelength tuning amount of the tunable optical filter is realized. The device has the advantages of adjustable measurement sensitivity, high precision, and simple measurement method.

Description

technical field [0001] The invention belongs to the field of electronic measurement of filtering performance testing of an adjustable optical filter with an ultra-small wavelength shift amount, and in particular relates to a measuring device for the wavelength tuning amount of a high-precision adjustable optical filter. Background technique [0002] In the all-optical network, the optical filter is an important device to realize optical wavelength division multiplexing. As a branch of it, the research and application of tunable optical filter technology has always been a very attractive topic. The appliance has the characteristics of simple control, low modulation voltage, large optical attenuation range and continuous adjustment, and has a good application prospect in future optical communication systems. [0003] High-precision tunable optical filters are widely used in the generation of optical frequency combs, microwave photon single-sideband modulation, and microwave ph...

AI Technical Summary

Problems solved by technology

In these applications, the central wavelength resolution of the tunable optical filter is required to be below 0.01nm, and commonly used optical wavelength measurement instruments and methods such as spectrometers cannot measure changes in light wavelengths less than 0.01nm

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