Multichannel optical fiber insertion and return loss tester and test calibration method

Abstract

The invention discloses a multichannel optical fiber insertion and return loss tester comprising light source sets, multiple light de-multiplexers, a polarization controller, a built-in detector multipath light power meter, a main controller and an external detector reference light power meter which is connected with a main controller circuit. The multichannel optical fiber insertion and return loss tester is provided with one or two forward output test ports and multiple forward input test ports. The forward output test ports and the forward input test ports are respectively connected with a device to be tested via test-used jumper wires. The main controller is respectively connected with the multiple light source sets, a light switch set, multipath light switches, the polarization controller and built-in multipath light power meter circuits. The invention also discloses a test calibration method. Errors caused by connection loss uncertainty are eliminated. Besides, multichannel insertion and return loss and polarization-related loss are measured in real time so that the tester is high in measurement efficiency.

Description

[0001] technical field [0002] The invention belongs to the technical field of photoelectric communication, and in particular relates to an optical fiber insertion return loss tester and a test calibration method. Background technique [0003] With the advancement of society, communication technology has been greatly developed, FTTH (fiber to the home) has become a final form of optical fiber access network development, and the market demand for optical splitters as the core components of FTTH is increasing. Optical splitters generally include 1 or 2 input ports and multiple output ports. The technical indicators mainly include: insertion loss IL, polarization-dependent loss PDL and return loss RL, where IL and PDL are forward tests, and RL is both For forward testing and reverse testing. Traditionally, the testing of technical parameters of optical splitters and other components is mainly done by single-function insertion loss testers, return loss testers and polarization...

AI Technical Summary

Problems solved by technology

At present, the optical fiber insertion return loss tester developed on the market can complete the forward multi-channel insertion loss test, or the reverse multi-channel return loss test. The test port needs to be connected with an external test jumper to the component under test. The uncertainty of the connection loss each time the instrument is connected to an external test jumper will cause a direct error in the insertion loss IL test, resulting in inaccurate measurement data.

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