Highly integrated fiber optic interferometer

A fiber optic interferometer, a high-integration technology, used in instruments, using optical devices to transmit sensing components, and converting sensor outputs, etc., can solve problems such as increasing system volume and fabrication complexity, easily introducing additional noise, and reducing detection speed. , to achieve the effect of improving system integration, improving sensitivity and reducing parasitic capacitance

Inactive Publication Date: 2019-04-05
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Parasitic inductance, capacitance, and resistance created by connections between discrete electronic components such as photodetectors, preamplifiers, and signal processing systems also slow detection speed and are prone to noise
In addition, when the output of the interferometer needs to use multiple optical paths (such as two-way coupling and splitting at the output of the interferometric optical path of the interferometer, and differential interference signals are used to suppress common-mode noise), it is necessary to use multiple discrete Photodetectors, multiple output fibers, and corresponding couplers are connected, which increases the volume and preparation complexity of the system, and is easy to introduce additional noise

Method used

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Examples

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example 1

[0026] Example 1: If image 3 As shown, the integrated interferometer described in the present invention can be a small sensor module, including a module package 301 , a light source 302 , a photoelectric detection and data processing chip 303 and a single optical fiber 304 . The sensing portion 305 of the single optical fiber 304 is in the test area outside the sensor module package 301 . The module can be used for precise measurement and real-time monitoring of various physical quantities such as temperature, pressure, and magnetism, and can be widely used as a sensor node in sensor networks and Internet of Things systems.

[0027] The detection results of the sensor module can be read out by an external system through a line connection, such as Figure 4 As shown, the interferometer sensor module 401 is on an electronic circuit board 402, and the circuit connection 403 at one end of the electronic circuit board 402 includes the power supply circuit of the electronic circui...

example 2

[0029] Example 2: Combining with Figure 6 , an example when the present invention is used as a magnetic sensor module will be described in detail below. It consists of a light source 601, a single-mode single-core input fiber 602, a first splitter tapered coupling region 603, a single-mode dual-core sensing fiber 604, a light-combining tapered coupling region 605, a single-mode single-core transmission fiber 606, a second splitter It consists of a tapered coupling region 607 , a single-mode dual-core output optical fiber 608 , and a photoelectric detection chip 609 . The photodetection chip 609 is composed of two identical on-chip photodiodes 691, 692, an on-chip differential signal amplifier 693, an analog-to-digital converter (ADC) circuit 694, an on-chip memory 695, and an interface circuit 696.

[0030] The pulsed optical signal emitted by the light source 601 is sent into the single-mode dual-core sensing optical fiber 604 through the single-mode single-core input fiber...

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Abstract

The invention provides a highly integrated fiber optic interferometer. The highly integrated fiber optic interferometer consists of a light source, a single-mode single-core input fiber, a first split-light cone coupling region, a single-mode dual-core sensing fiber, a combined light cone coupling region, a single-mode single-core transmission fiber, a second split-light cone coupling region, anda single-mode dual-core output fiber, and a photo-detecting chip. The highly integrated fiber optic interferometer uses a photo-detecting chip designed in an integrated circuit process that matches the position and shape of the output fiber core to perform collection, photoelectric conversion, and process on the output of the interference light. The highly integrated fiber optic interferometer greatly increases the integration of the overall system, reduces the size of the interferometer system, reduces the complexity of the system, and increases the reliability. The highly integrated fiber optic interferometer can be used for accurate measurement and real-time monitoring of various physical quantities such as temperature, pressure, and magnetic force, and can be widely used as a sensor node in the sensor network and the Internet of Things system.

Description

(1) Technical field [0001] The invention relates to a highly integrated optical fiber interferometer, which can be used for precise measurement and real-time monitoring of various physical quantities such as temperature, pressure, and magnetism, and can be widely used as a sensor node in sensor networks and Internet of Things systems. It belongs to the technical field of optical fiber sensing. (2) Background technology [0002] As an optical sensing tool for sensing external information or measuring physical quantities, fiber optic interferometer has been widely used in urban construction, environmental detection, food safety detection, medical and biological sensors. At present, the research on optical fiber interferometer is developing towards multi-function, miniaturization and integration on the basis of fully improving and utilizing the existing optical fiber sensing technology. For tiny samples and optical fiber sensors suitable for narrow spaces, it is becoming more a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353
CPCG01D5/35329G01D5/35374
Inventor 邓仕杰滕传新刘厚权张文涛苑立波
Owner GUILIN UNIV OF ELECTRONIC TECH
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