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Novel optical fiber fabry-perot ultrasonic hydrophone and manufacturing method thereof

A technology of hydrophone and optical fiber, which is applied in the field of new fiber-optic fiber-optic ultrasonic hydrophone and its production, can solve the problems of limiting interference signal optimization, low reflectivity, difficult optical fiber end face reflectivity, etc., and achieves simple structure and high sensitivity , the effect of high spatial resolution

Inactive Publication Date: 2016-08-17
ZHONGBEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low reflectivity of quartz itself, and this method is difficult to improve the reflectivity of the fiber end face through coating, it limits the optimization of the interference signal of the fiber-optic FAPP ultrasonic hydrophone

Method used

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  • Novel optical fiber fabry-perot ultrasonic hydrophone and manufacturing method thereof
  • Novel optical fiber fabry-perot ultrasonic hydrophone and manufacturing method thereof
  • Novel optical fiber fabry-perot ultrasonic hydrophone and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Step one, such as figure 1 One end of a single-mode optical fiber 1 with an inner diameter of 9 μm and an outer diameter of 125 μm produced by Corning and one end of a quartz capillary 3 with an inner diameter of 5 μm and an outer diameter of 125 μm were cut flat with a fiber optic cutter;

[0047] Step 2. Use the Japanese FITEL S183 optical fiber fusion splicer, adjust the discharge intensity parameters of the optical fiber fusion splicer to 100 and the discharge time to 280ms, discharge once, and weld the cut flat end of the quartz capillary 3 to the flat cut end of the single-mode optical fiber 1;

[0048] Step 3. Under a high-power microscope, cut off the quartz capillary with an optical fiber cutter at a distance of 119 μm from the fusion point;

[0049] Step 4: Coating a layer of platinum atomic film 6 with a thickness of 100 nm on the reflective surface 4 and reflective surface 5 by means of atomic layer deposition, so as to obtain a fiber-optic FAPP ultrasonic h...

Embodiment 2

[0051] Step one, such as figure 2 One end of a single-mode optical fiber 1 with an outer diameter of 125 μm and a core of 9 μm produced by Corning and one end of a quartz capillary 3 with an inner diameter of 20 μm and an outer diameter of 125 μm were cut flat with a fiber optic cutter;

[0052] Step 2. Use the Japanese FITEL S183 optical fiber fusion splicer, adjust the discharge intensity parameter of the optical fiber fusion splicer to 100 and the discharge time to 660ms, discharge once, and weld the cut flat end of the quartz capillary 3 to the cut flat end of the single-mode optical fiber 1;

[0053] Step 3. Cut off the quartz capillary 3 with an optical fiber cutter at a distance of 230 μm from the fusion point under a high-power microscope;

[0054] Step 4: Coating a layer of platinum atomic film 6 with a thickness of 100 nm on the reflective surface 4 and reflective surface 5 by means of atomic layer deposition, so as to obtain a fiber-optic FAPP ultrasonic hydrophone...

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Abstract

The invention discloses a novel optical fiber fabry-perot ultrasonic hydrophone and a manufacturing method thereof. The hydrophone can be used for measuring the high-intensity focusing acoustic field, and comprises optical fiber and a quartz capillary fused and spliced at the end part of the optical fiber; a high-reflective film is respectively plated at the end surface of the quartz capillary and the end surface of the optical fiber right against the quartz capillary; the outer diameter of the quartz capillary is identical to the outer diameter of single-mode optical fiber, and the inner diameter of the quartz capillary is smaller than the fiber core diameter of the single-mode optical fiber; if the inner diameter of the used quartz capillary is greater than the fiber core diameter of the optical fiber, the fusion splicing intensity can be properly enhanced, so that the front end of the quartz capillary is collapsed until the inner diameter of the quartz capillary is smaller than the fiber core diameter of the optical fiber. The novel optical fiber fabry-perot ultrasonic hydrophone has the advantages of simple structure, high interference signal, high intensity, high spatial resolution, high sensitivity and the like, and can bear high temperature and high sound pressure of an HIFU (high intensity focused ultrasound) sound field.

Description

technical field [0001] The invention belongs to the field of optical fiber sensing, and mainly relates to a novel optical fiber FAP ultrasonic hydrophone and a manufacturing method thereof. Background technique [0002] The fiber optic ultrasonic hydrophone is a particularly important type of hydrophone used to measure the High Intensity Focused Ultrasound (HIFU) sound field. Because the sound intensity, sound pressure, and temperature are very high at the focus of the HIFU sound field, and Accompanied by extremely strong nonlinear high-order harmonics, the HIFU sound field is ellipsoidal (the long axis is about 6mm to 10mm, and the short axis is about 1mm). Therefore, the diameter of the ultrasonic sensing device for measuring the HIFU sound field is required to be no greater than 0.5mm. At present, the ultrasonic sensing equipment for measuring the HIFU sound field mainly includes PVDF (polyvinylidene fluoride) piezoelectric hydrophones, fiber optic probe hydrophones, fibe...

Claims

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Application Information

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IPC IPC(8): G01H9/00G02B6/255G02B6/30
CPCG01H9/004G02B6/2551G02B6/30
Inventor 贾平岗熊继军房国成王代华
Owner ZHONGBEI UNIV
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