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Detection system based on ED-MFKL (Er<3+>-doped microfiber knot laser) and method

A micro-nano optical fiber and detection system technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of insufficient drawing length of micro-nano optical fiber, short absorption path, detection sensitivity limit, etc., and achieve simple packaging structure design, anti-electromagnetic Effects of interference, large dynamic range

Active Publication Date: 2016-06-22
山东华工科技发展集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, there are few research reports on gas sensors based on micro-nano fibers. The main reason is that the drawn length of micro-nano fibers is not long enough. Sensitivity is limited

Method used

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  • Detection system based on ED-MFKL (Er&lt;3+&gt;-doped microfiber knot laser) and method
  • Detection system based on ED-MFKL (Er&lt;3+&gt;-doped microfiber knot laser) and method
  • Detection system based on ED-MFKL (Er&lt;3+&gt;-doped microfiber knot laser) and method

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Embodiment 1

[0035] Embodiment 1 of the present invention such as image 3 As shown, an Er-doped 3+ Gas detection system for micro-nano fiber ring junction laser, including 980nm pump light source (LD) 1, wavelength division multiplexer (WDM) 2, isolator (ISO) 4, packaged ED-MFKL3, and gas processing unit. The 980nm pump light source 1 is connected to the 980nm input end of the wavelength division multiplexer (WDM) 2 through its pigtail; the common end of the wavelength division multiplexer (WDM) 2 is connected to the pigtail 14 of the packaged ED-MFKL3 ; The 1550nm end of the wavelength division multiplexer (WDM) 2 is connected to the positive input of the isolator (ISO) 4, and the other end of the isolator (ISO) 4 is connected to the gas processing unit; the gas processing unit includes a photodetector 5 , lock-in amplifier 6 and field programmable logic gate array (FPGA) processor 7, wherein the input end of photodetector 5 is connected with isolator 4, the output end of photodetector ...

Embodiment 2

[0047] Same as real-time example 1, except that the gas to be measured is ammonia, and the output laser wavelength of ED-MFKL is 1544nm.

Embodiment 3

[0049] Same as real-time example 1, except that the gas to be measured is carbon monoxide, and the output laser wavelength of ED-MFKL is 1567nm.

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Abstract

The invention discloses a detection system based on an ED-MFKL (Er<3+>-doped microfiber knot laser) and a method. The laser is the ED-MFKL with Er<3+>-doped microfibers as an active medium and a knot as a resonant cavity; the Er<3+>-doped microfibers are formed by drawing a piece of Er<3+>-doped block glass by the aid of sapphire fibers with a direct drawing method; the knot is prepared from the Er<3+>-doped microfibers; the strong evanescent wave field of the microfibers is placed in the resonant cavity of the fiber laser, the detection sensitivity can be improved by multiple orders of magnitudes, and integration of output and sensing of laser is realized.

Description

technical field [0001] The invention relates to the technical field of optical fiber laser sensing and detection, in particular to a detection system and method based on an erbium-doped micro-nano optical fiber ring junction laser. Background technique [0002] Trace gas detection technology has a wide range of application requirements in many industries and fields such as environmental protection, chemical production, resource mining, and food packaging. How to accurately and quickly detect toxic, harmful, flammable, and explosive gases has become an urgent problem. one of the important issues. Industrial civilization and urban development, while creating huge wealth for human beings, also discharge billions of tons of exhaust gas and waste into the atmosphere. The atmosphere on which human beings depend for survival has become a repository of garbage and poisonous gas in the air. The development of detection and early warning technologies for major air pollutants such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/39
CPCG01N21/39
Inventor 王朋朋王仁德朱存光王光伟陶雪辰郑志丽孟双双崔婷婷
Owner 山东华工科技发展集团有限公司
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