Method and device for testing multi-core optical fiber
A technology of multi-core optical fiber and testing method, which is applied in the direction of measuring device, optical instrument testing, testing optical performance, etc., can solve the problems of increasing measurement uncertainty, difficulty of test preparation, difficult identification and accurate injection of test light, etc., to achieve The effect of improving test efficiency
Active Publication Date: 2021-10-26
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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Problems solved by technology
The technical disadvantages of existing testing methods are: in order to overcome the difficulty of identifying each fiber core of a multi-core fiber and accurately injecting test light, it is generally used to couple a fan-out multi-core fiber manufactured by a tapered process on the end face of the multi-core fiber. Coupler method, decompose the input and output of multi-core optical fiber into multiple conventional optical fibers, and then test
This method adds additional coupler consumables, introduces conventional fiber, increases measurement uncertainty and test preparation difficulty
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[0039] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0040] In the examples of the present invention, "first", "second", etc. are used to distinguish different objects, and are not necessarily used to describe a specific order or sequence.
[0041] Multi-core fiber is a special kind of fiber. The difference from general fiber is that multi-core fiber has multiple cores that can transmit light at the same time within the same cladding. Like convention...
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The invention discloses a multi-core optical fiber testing method and device, which belong to the field of optical fiber cable production testing, wherein the implementation of the method includes: injecting optical power into any core of the multi-core optical fiber, and recording the incident end surface on the CCD at this time. Image features; then inject optical power into another core, record the image features of the incident end surface on the CCD at this time, and compare the image features twice to obtain the image coordinate mapping relationship of the optical power injection position on the CCD, and then sequentially Move each core to this position for light injection to complete the test. The invention can realize the transmission performance test of each fiber core of the multi-core optical fiber by the method of spatial optical coupling, achieve the test function that cannot be realized by using the multi-core fan-out coupler at present, and improve the test efficiency of the multi-core optical fiber.
Description
technical field [0001] The invention belongs to the field of production and testing of optical fibers and cables, and more particularly, relates to a method and a device for judging the current tested cores of multi-core optical fibers. Background technique [0002] Multi-core fiber is a new type of fiber with multiple independent cores in a common cladding region, which can be used for high-density, large-capacity signal transmission. Like conventional multi-mode and single-mode fibers, various optical properties of multi-core fibers also need to be tested. However, the cross-section of a multi-core fiber is generally a circular symmetrical figure, and it is difficult to find an obvious reference correspondence between the cores of the input and output ends, and it is impossible to accurately inject optical power into the specified core. Therefore, at present, a multi-core fiber fan-out coupler is usually used for testing and spliced to the multi-core fiber to be tested,...
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IPC IPC(8): G01M11/02
CPCG01M11/0285
Inventor 茅昕于竞雄张智恒胡远朋刘懋恂
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD