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Bamboo joint type fiber laser hydrophone packaging structure and assembling method thereof

A packaging structure and fiber laser technology, which is applied to instruments, measuring devices, and measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problems of flat low-frequency response and sensitivity drop, affecting the low-frequency response characteristics of fiber laser hydrophones, etc., to overcome Susceptible to electromagnetic environment and long-term transmission attenuation, high sensitivity, and good stability

Active Publication Date: 2018-06-12
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology

However, in the course of the fiber laser hydrophone test, it was found that although the fiber laser hydrophone with the packaging structure of the cylindrical support tube with axisymmetric structure can realize the receiving test of the underwater acoustic signal, when the diameter of the hydrophone When the working frequency band decreases, its low-frequency response flatness and sensitivity decrease, especially when the frequency band drops below 200Hz, the hydrophone has resonance at multiple frequency points, which seriously affects the performance of the fiber laser hydrophone. Low frequency response characteristics, which in turn affect the use

Method used

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  • Bamboo joint type fiber laser hydrophone packaging structure and assembling method thereof
  • Bamboo joint type fiber laser hydrophone packaging structure and assembling method thereof
  • Bamboo joint type fiber laser hydrophone packaging structure and assembling method thereof

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Embodiment Construction

[0048] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the public implementation manners of the present invention in detail with reference to the accompanying drawings.

[0049] refer to figure 1 , which shows a schematic diagram of a package structure of a bamboo fiber laser hydrophone in an embodiment of the present invention. In this embodiment, the packaging structure of the bamboo fiber laser hydrophone includes: a pair of end caps 1 , a pair of elastic diaphragms 2 , a bamboo-shaped elastic tube 3 and an active optical fiber 4 .

[0050] In this embodiment, a plurality of circular grooves 301 are provided on the outer surface of the bamboo-shaped elastic cylinder, which is in a tooth-like structure with depressions and protrusions; wherein, the inside of the bamboo-shaped elastic cylinder is filled with silicone oil. A pair of elastic diaphragms are respectively glued to the two ends o...

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Abstract

The invention discloses a bamboo joint type fiber laser hydrophone packaging structure, an assembling method thereof, and a processing method of a bamboo-joint-shaped elastic cylinder. The packaging structure comprises a pair of end caps, a pair of elastic films, the bamboo-joint-shaped elastic cylinder and an active fiber, the external surface of the bamboo-joint-shaped elastic cylinder is provided with multiple circular grooves, the internal of the bamboo-joint-shaped elastic cylinder is filled with silicone oil, the two elastic films are glued to the two ends of the bamboo-joint-shaped elastic cylinder respectively, the two end caps are arranged at the two ends of the bamboo-joint-shaped elastic cylinder respectively, air cavity structures are formed between the end caps and the corresponding elastic films respectively, the active fiber is positioned in the internal central axis of the bamboo-joint-shaped elastic cylinder, and the two ends of the active fiber penetrates out of the end caps respectively.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to a bamboo-shaped optical fiber laser hydrophone packaging structure and an assembly method thereof, and a processing method of a bamboo-shaped elastic cylinder. Background technique [0002] The fiber laser hydrophone relies on the "active" fiber grating technology, uses the "active" fiber grating as a sensitive element, writes a fiber Bragg grating with a certain phase shift on the erbium-doped or erbium-ytterbium co-doped fiber to form a distributed feedback fiber laser . The underwater acoustic signal is obtained by detecting the phase shift change caused by the external sound pressure acting on the laser resonator cavity. Since the distributed feedback fiber laser directly etches the grating on the optical fiber, and its diameter is the diameter of the optical fiber, the fiber laser hydrophone obtained after packaging it not only has the advantages o...

Claims

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Application Information

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IPC IPC(8): G01H9/00B29C39/10
CPCB29C39/10G01H9/004
Inventor 李振姜文征赵晨张海岩于文鹏王学锋
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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