Optical power microwave testing device and method based on dye optical sensitization characteristics

Abstract

The invention provides an optical power microwave testing device and method based on dye optical sensitization characteristics. The device comprises a coaxial resonant cavity, an optical fiber, an optical sensitization dye, a light source, a light source fixing bracket and a vector network analyzer, wherein the vector network analyzer is connected with the coaxial resonant cavity through a microwave cable; the surface of the optical fiber is coated with the optical sensitization dye, and the end, coated with the dye, of the optical fiber is vertically placed in a test hole of the coaxial resonant cavity; the light source is fixed by the bracket and vertically irradiates the test hole of the coaxial resonant cavity. The device has the characteristics of high test precision, good test stability, low use and maintenance cost and low requirements for sample placement; besides, the optical sensitization dye is adopted, wide spectrum detection from red light to purple light can be achieved;the coaxial resonant cavity with concentrated field strength and high quality factor is adopted, and real-time response to the instantaneous change of the radiation power of the light source can be achieved in the test process, so that accuracy of test results is ensured.

Description

technical field [0001] The invention belongs to the technical field of microwave photonics, and in particular relates to an optical power testing device and method. Background technique [0002] With the rapid development of optical communication technology and passive optical fiber network technology, optical power detection is particularly important. Changes in optical power can easily lead to communication and network failures. In the field of optical communication, in order to ensure the continuity, stability and safety of the work between devices, all optical devices are usually tested. [0003] At present, the main method of optical power detection is AD conversion, which couples the light to be measured to APD (avalanche photon detector, avalanche photodiode) or PIN tube through a coupler, and then amplifies the obtained voltage through an amplifier, and Sampling is carried out, and finally the optical power value to be detected can be calculated. Commonly used ampl...

AI Technical Summary

Problems solved by technology

The logarithmic amplifier has a larger range, generally its value can reach 60dB, and it has a relatively uniform range in the entire range, but due to the existing technology, the resolution in the range is too low, resulting in low optical power detection accuracy. drop with it

The sampling range of the optical power of the traditional AD converter is generally within 0~20dBm, but the actual optical power is usually higher than 20dBm, at this time, the traditional AD converter will no longer meet the requirements

In addition, some integrated optical power detection devices can also realize the simple detection of optical radiation power, but due to the limitation of processing cost and universality of use, it cannot be widely used.

[0004] To sum up, the detection amplitude range of traditional optical power detection technology is small, and technology and cost limit its use conditions and application range

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