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A method for preparing optical fiber quantum probes with controllable diamond particle doping concentration

A diamond particle and doping concentration technology, applied in the size/direction of the magnetic field, using magneto-optical equipment for magnetic field measurement, thermometers, etc., can solve the problem of inability to accurately control the concentration of diamond particles, large-scale production, and low repeatability, etc. question

Active Publication Date: 2021-11-02
厦门烽行光电科技有限公司
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Problems solved by technology

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the technical problem to be solved in the present invention is that the existing optical fiber and the nano-diamond particle coupling method containing NV color center cannot accurately control the diamond particle concentration, the repeatability is low, and it cannot be produced on a large scale. To solve this problem, a method of preparing optical fiber quantum probes with controllable diamond particle doping concentration is proposed, using the sol-gel method to dope nano-diamonds, and making optical fiber probes on the end face of optical fibers by dipping by pulling method

Method used

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  • A method for preparing optical fiber quantum probes with controllable diamond particle doping concentration
  • A method for preparing optical fiber quantum probes with controllable diamond particle doping concentration
  • A method for preparing optical fiber quantum probes with controllable diamond particle doping concentration

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Embodiment 1

[0026] exist figure 2 Among them, the optical fiber probe coated with gel doped with nano-diamond particles containing NV color centers in this embodiment consists of a sol-gel film 1 , nano-diamond particles 2 containing NV color centers, and an optical fiber 3 . The shape of the sol-gel film 1 in this embodiment is hemispherical with a certain curvature, which is caused by the surface tension generated during the preparation process of the pulling method. The size of the nano-diamond particles 3 containing NV color centers doped in the sol-gel is not limited, and the usable particle size ranges from tens of nanometers to hundreds of nanometers.

Embodiment 2

[0028] figure 2 Among them, the thickness of the sol-gel 1 on the end face of the optical fiber 3 can be controlled by the pulling speed of the stepping motor, which can realize the preparation of optical fiber quantum probes with different thicknesses of nano-diamond particle films containing NV color centers.

Embodiment 3

[0030] figure 2 Among them, sol-gel 1 can be replaced with different types of sol-gel materials according to actual needs, and is not limited to a single sol-gel material; optical fiber 3 can use single-mode optical fibers, multi-mode optical fibers and photonic crystals Ordinary optical fibers such as optical fibers or special optical fibers are not limited to a single type of optical fiber.

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Abstract

A method for preparing an optical fiber quantum probe with controllable diamond particle doping concentration, comprising the following steps: step 1, mixing the solution with an aqueous solution of nano diamond particles containing NV color centers; step 2, by sol-gel method, Ultrasonically dissolve the solution doped with nano-diamond particles containing NV color centers, seal and let it stand until it is fully hydrolyzed to form a sol-gel; step 3, apply the sol-gel prepared in step 2) evenly on the The end face of the optical fiber is supported by a stepping motor, the end face of the optical fiber is in contact with the sol-gel and pulled at a certain rate after a certain period of time to form a hemispherical gel film with a certain thickness and a certain curvature on the end face, which is prepared after curing fiber optic quantum probe. The doping concentration of nano-diamond particles containing NV color centers can be controlled and mixed evenly. In addition, the manufacturing process of the probe is convenient, the repeatability is high, and mass production can be realized.

Description

technical field [0001] The invention belongs to the technical field of making optical fiber two-word probes, and relates to a method for preparing optical fiber quantum probes with controllable diamond particle doping concentration, in particular to a method based on sol-gel doping with nitrogen-vacancy color center diamond nanometer Fiber-optic quantum probes for particles. Background technique [0002] At room temperature, the nitrogen-vacancy color center is a carbon atom in diamond replaced by a nitrogen atom, and there is a vacancy nearby, such as figure 1 Shown by the cube on the left. It has unique advantages such as stable optical properties and electron spin properties. This solid-state single-spin system has stable fluorescence emission, ultra-long electron spin coherence time, easy initialization and readout, and can be manipulated. Many advantages such as coherence time show great application prospects in quantum precision measurement. Based on nitrogen-vacanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/3213G01R33/00G01R33/032
CPCG01K11/3213G01R33/0052G01R33/032
Inventor 王若晖边策褚智勤忽满利曹蔚
Owner 厦门烽行光电科技有限公司
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