Бриллюэновский оптический рефлектометр 6419

3D Display
Tri-dimensional distribution of Brillouin scattering spectrum at different location can be observed conveniently in 3D display.

Multi-window Display
The multi-window display allows to simultaneously observe the strain, Brillouin scattering spectrum, spectrum width and scattering power at different location along the optical fiber.

Long-distance detectivity
6419 can detect the optical fiber line nearly 80km.

Spatial resolution of less tha 1m
By optimizing the optical path, circuit and data processing model, 6419 has spatial resolution of less than 1m. In the right fig, the distance between marker1 and marker 2 is 1m, and the distance between marker 3 and marker4 is 0.5m.

High-precision strain test 
Under 10ns pulse width, the strain test accuracy of 6419 BOTDR reaches±18με at a distance of 11km.

Visual Fault Locator (VFL)
6419 has built-in visual fault locator (VFL) function, with three operation modes of CW, 1Hz and 2Hz. It can help operators to quickly locate the break points or the remarkable loss points in short-distance optical fiber line.
Multiple External Interface
6419 offers multiple external interfaces, such as USB, Ethernet, RS232C, earphone etc., which can realize the functions as follows:

• Connection with external USB disc
• Connection with external printer based on USB interface
• Communication with PC computer
• Remote controlvia Ethernet
• Connection with external earphone

TYPICAL APPLICATIONS
Monitoring of submarine optical cables
It is necessary to measure the strain distribution of the submarine optical fiber cable during the phases of production, checkout after the arrival, check and maintenance before and after the construction, in order to prevent the optical fiber from breaking due to the large strain, which can further break off communication and bring about large damage.
6419 is applicable to measure the strain distribution during all the phases of production, transport and construction of optical fiber cables.

Detection of geologic hazard (landslide)
By laying optical fiber on the important landslide, with the aid of 6419 BOTDR, we can detect the shift degree of landslide internal rock-soil and detect its real-time tendency. When the strain is remarkable, operator can handle it in time by setting appropriate threshold alarm, so this can avoid big loss by geology hazard.
  
Tunnel health monitoring

Oil pipeline monitoring

Bridge monitoring  


Dam monitoring

Power line monitoring

Coal mine passageway monitoring

Oil well platform monitoring

Lofty building health monitoring

  
Typical experiments
(1）Repeatability test experiment

Testing curve
Optical fiber strain due to stretching can be found obviously at the location of 0.3157km, and the strain is about 4992.6με.
The right fig. shows the strain measurement results of 10 successive times by 6419 under 10ns detection pulse.
(2）Test experiment of optical fiber ring
During the development, production and test of fiber opticalgyroscope, AV6419 BOTDR can be used to measure the strain distribution of the optical fiber ring.
(3）The calibration experiment of optical fiber temperature coefficient

The relation curve between Brillouin frequency shift and Temperature:
The optical fiber under test was G.652 single-mode fiber. Above, the left figure shows the measurement trace of temperature range from 30℃to 50℃with the span of 1℃, and the right figure shows the trace of temperature range from30℃to 90℃with the span of respectively 1℃(30℃-50℃) and 5℃(50℃-90℃). Through the left figure, it can be found out that the temperature resolution of AV6419 can be 0.5℃.