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Techwin Fiber Sensing MachineTW3600 (BOTDR) for Monitoring of submarine optical cables

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TechwinFiber Sensing MachineTW3600 (BOTDR) for Monitoring of submarine optical cables

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You probably see us at following exhibitions: Photonica in Russia, SPIE Photonics Europe in France, SPIE Defense + Commercial Sensing in USA, International Pipeline Exposition in Canada and so on.

Product Overview

Techwin Brillouin Optical Time Domain Reflectometer TW3600 (BOTDR) can simultaneously measurestrain distribution, loss distribution and Brillouin scattering spectrum at different location of optical fiber, and can display 3D and multiple distribution parameters. It has the advantages of high-precision strain measurement, good repeatability, single-end non-destructive measurement etc. It has become an indispensable instrument in the field of optical fiber communication and optical fiber sensing (OFS).

Techwin Brillouin Optical Time Domain Reflectometer TW3600 (BOTDR) can be widely used for thehealth monitoring of bridge, dam, tunnel, lofty building, oil well platform and oil pipeline etc., the forecasting and alarming of geological hazard such as mountain landslide, mud-rock flow andearthquake etc., as well as the health inspection of intelligent structures as naval vessels and spacecraft etc.

Techwin Brillouin Optical Time Domain Reflectometer TW3600 (BOTDR) can be also used to measure the strain distribution of optical fiber loop or subsea optical cable when the optical fiber gyroscope (OFG) and optical fiber hydro are in the process of development, production, and test, or when the subsea optical cable is in the process of development, production, construction, acceptance inspection and maintenance.

Main Features

  • Single-end nondestructive test
  • Measurement of Brillouin scattering spectrum width distribution
  • Measurement of optical fiber strain distribution
  • Measurement of optical fiber loss distribution
  • Measurement of Brillouin scattering spectrum
  • Multi-window display
  • 3D display of loss distribution
  • Large screen color LCD display, touch screen operation
  • Built-in visual fault locator (VFL)
  • Remote control
  • System software on-line upgrading, no need to return to factory

Details about part features

3D Display

Tridimensional 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

TW3600 can detect the optical fiber line nearly 80km. Spatial resolution of less than 1m. By optimizing the optical path, circuit and data processing model, TW3600 has spatial resolution of less than 1m. In the right fig, the distance between marker1 and marker2 is 1m, and the distance between marker3 and marker4 is 0.5m

High-precision strain test

Under 10ns pulse width, the strain test accuracy of TW3600 BOTDR reaches to ±18με at a distance of 11km.

Visual Fault Locator (VFL)

Techwin Brillouin Optical Time Domain Reflectometer TW3600 (BOTDR) 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

Techwin Brillouin Optical Time Domain Reflectometer TW3600 (BOTDR) offers

multiple external interfaces, such as USB, Ethernet, RS232C, ear 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 control via Ethernet

Connection with external ear

Typical Application

  • Monitoring of submarine optical cables

It is necessary to measure the strain distribution of the submarine optical fiber cable during the phases ofproduction, 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.

Techwin Brillouin Optical Time Domain Reflectometer TW3600 (BOTDR) 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 Techwin Brillouin Optical Time Domain Reflectometer TW3600 (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 due to geology hazard.

  • Tunnel health monitoring
  • Oil pipeline monitoring
  • Bridge monitoring
  • Dam monitoring
  • Coal mine passageway monitoring
  • Oil well platform monitoring
  • Lofty building health monitoring


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