A perovskite-based cspbbr 3 Heterojunction fiber end face mode field analyzer

A fiber end-face and heterojunction technology, applied in the field of fiber-optic end-face mode field analyzers, can solve the problems of expensive instruments, bulky volume, etc.

Active Publication Date: 2021-09-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] In view of the above-mentioned existing problems or deficiencies, in order to solve the problem that the existing optical fiber mode field direct monitoring instrument is expensive or bulky, the present invention provides a perovskite-based CsPbBr 3 A heterojunction fiber end-face mode field analyzer, through the gold electrode and CsPbBr on the fiber end face 3 The highly integrated surface array of perovskite nanocrystal heterojunction establishes the relationship between electrical signal size-light intensity-mode field distribution, so as to clarify the expression form of the transverse mode mode field at the fiber end face during optical fiber transmission, and realize Direct real-time detection of the mode field inside the fiber

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  • A perovskite-based cspbbr <sub>3</sub> Heterojunction fiber end face mode field analyzer
  • A perovskite-based cspbbr <sub>3</sub> Heterojunction fiber end face mode field analyzer
  • A perovskite-based cspbbr <sub>3</sub> Heterojunction fiber end face mode field analyzer

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] combine figure 1 , using a section of 105 / 125 μm multimode optical fiber, strip one end of its coating layer, use a cleaver to obtain a flat cross section, and then perform polishing treatment to reduce the surface roughness to <10nm. Afterwards, put the optical fiber after cutting and polishing the end face into an ultrasonic cleaning machine for cleaning for 30 seconds, and be careful not to touch the end face with other objects. Then immerse the end face of the optical fiber in 95% alcohol for 30s, and finally take it out and wait for it to dry to obtain a smooth end face of the multimode optical fiber without impurities.

[0025] First deposit a layer of perovskite CsPbBr on the fiber end face 3 Matrix-array thin films, cell-structured perovskite CsPbBr in the array 3 The size of the film is 8nm×3nm, the thickness is 50nm, and th...

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Abstract

The invention belongs to the field of photodetectors, specifically a perovskite-based CsPbBr 3 Heterojunction fiber end-face mode field analyzer. The present invention adopts the gold-perovskite CsPbBr designed on the end face of the optical fiber 3 ‑Gold heterojunction surface array, collect micro-current signals at different positions on the end face, combine with external photoelectric devices to reflect the optical power distribution at different positions on the end face of the fiber through the current, and use data processing software to make statistics on the distribution of the current, so as to The transverse mode distribution of the optical fiber is visualized and characterized. The invention highly integrates and miniaturizes the mode field analyzer, realizes the direct detection of the optical fiber transmission transverse mode mode field in the visible light band, and has short response time, low cost and stable signal, and has advantages for optical signal detection in the field of optical fiber communication. High application value.

Description

technical field [0001] The invention belongs to the field of photodetectors, specifically a perovskite-based CsPbBr 3 Heterojunction fiber end face mode field analyzer, the heterojunctions are arranged on the fiber end face in the form of an array. Background technique [0002] In the process of optical fiber transmission, it is often difficult for people to directly obtain the internal mode field distribution. Traditional mode field analysis methods often need to use simulation results to estimate the actual situation. However, for the case of large-core multi-mode fields, at this time The transmission of the mode field is much more complicated and the calculation process is more difficult. With the development of the field of optical fiber communication, each device is required to be highly integrated, and at the same time, there are higher requirements for its response time and accuracy. Therefore, the direct monitoring and control of the internal mode field of the optic...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/00G01J1/42
CPCG01J1/42G01M11/30
Inventor 秦琛烨姚佰承安宁李艺威
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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