Micro optical fiber dispersion measuring device based on double-coupler loop optical path structure
A technology for optical fiber dispersion and measuring devices, which is applied in the testing of machines/structural components, measuring devices, and optical instrument testing. It can solve problems such as short length and difficulty in accurately measuring dispersion coefficients, and improve signal-to-noise ratio and dispersion measurement. The effect of precision and low cost
Pending Publication Date: 2021-12-17
GUANGDONG UNIV OF TECH
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[0008] The object of the present invention is a micro-fiber dispersion measuring device based on a dual-coupler circular optical path structure, which solves the problem in the background art that it is difficult to accurately measure the dispersion of optical fibers and devices with small dispersion coefficients and short lengths. At the same time, based on the dual-coupler circular The optical path structure can support more optical wave trains with the same system dynamic range, thereby further improving the dispersion measurement accuracy
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[0047] In order to clearly illustrate a micro-fiber dispersion measuring device based on a double-coupler circular optical path structure of the present invention, the present invention will be further described in conjunction with the embodiments and accompanying drawings, but this should not limit the protection scope of the present invention.
[0048] figure 1 It is a device diagram of the present invention, wherein the selection and parameters of the main optoelectronic devices are as follows:
[0049] 1) The central wavelength of the broadband light source 10 is 1550nm, the spectral width is 50nm, and the fiber output power ranges from 0 to 10mW;
[0050] 2) The first coupler 21, the second coupler 31, the third coupler 32, and the fourth coupler 26 are all single-mode couplers, and the central operating wavelength is 1550nm;
[0051] 3) The optical path scanning range of the optical path correlator is from 0 to 160cm;
[0052] 4) The optical fiber to be tested is selec...
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Abstract
The invention discloses a micro optical fiber dispersion measuring device based on a double-coupler loop optical path structure, which can be used for high-precision dispersion measurement of small-dispersion-coefficient or short optical fibers and devices, and belongs to the technical field of optical fiber measurement. The device comprises a wide-spectrum light source, an interferometer, a double-coupler loop structure, a detection module and a dispersion calculation module, and is characterized in that the wide-spectrum light source provides a light source for the interferometer; the double-coupler loop structure is connected to a measuring arm of the interferometer; an interference signal with dispersion information can be obtained by adjusting the optical path of a reference arm; and finally, dispersion information in the interference signal is extracted by using the dispersion calculation module. On one hand, the double-coupler loop structure additionally provides an adjustable power coupling proportion parameter, and on the other hand, under the condition of the same system dynamic range, the double-coupler loop structure can support more circulation times of light wave columns and thus improve the dispersion measurement precision. The problem of difficulty in high-precision measurement of micro dispersion of optical fibers and devices thereof in the prior art is solved.
Description
technical field [0001] The invention belongs to the technical field of optical fiber measurement, and in particular relates to a micro-chromatic dispersion measurement device for an optical fiber device based on a circular optical path structure. Background technique [0002] Optical fiber communication has become an important part of the communication system because of its large transmission capacity and strong anti-interference ability. With the development of society, the amount of various information is increasing, which requires a higher-speed communication system, and in the high-speed optical fiber communication system, the existence of dispersion will cause intersymbol interference, so it is necessary to perform dispersion compensation on the optical fiber communication system . To perform dispersion compensation, the dispersion value of the optical fiber communication system must be known first, therefore, dispersion measurement becomes an essential link. The comm...
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IPC IPC(8): G01M11/00
CPCG01M11/30
Inventor 喻张俊薛志锋汪燚杨军徐鹏柏温坤华王云才秦玉文
Owner GUANGDONG UNIV OF TECH