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Distributed Optical Fiber Strain Tester
Category: Fiber coil winding & tester  Publish Time: 2014-09-19 15:23 

Distributed Optical Fiber Strain Tester
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Distributed Optical Fiber Strain Tester

Description
IDP6420 distributed optical fiber strain tester can measure strain distribution, loss distribution and Brillouin scattering spectrum at different location of optical fiber simultaneously, and can display 3D traces and multiple distribution parameters. It has the advantages of high strain measurement accuracy, good measurement repeatability, non-destructive measurement via one end, and it has become the indispensable instrument in the field of optical fiber communication and optical fiber sensor (OFS).
IDP6420 is used widely in the fields of health monitoring of bridge building, dam, tunnel, lofty building, oil well platform and oil pipeline, and also in the fields of forecasting of geological hazard, such as mountain landslide, mud-rock flow and earthquake, and the fields of the intelligent structure monitoring of seaborne naval vessels and aviation aerospace.
IDP6420 is also used to measuring the strain distribution of optical fiber loop or subsea optical cable in process of development, production and maintaining of fiber-optic gyroscope (OFG), optical fiber hydrophone and subsea optical cable.

Main Features
• Nondestructive measurement through single-end
• Distribution measurement of Brillouin scattering spectrum width
• Distribution measurement of optical fiber strain
• Distribution measurement of optical fiber loss
• Measurement of Brillouin scattering spectrum
• Display multiple distribution traces simultaneously
• 3D display of loss distribution
• Large screen color LCD display, touch screen operation
• Built-in visual fault locator
• System software on-line updating, no need to return to factory

General Specification

wavelength

1550nm±5nm

Optical fiber type

Single-mode fiber

Maximum dynamic range

15dB

Strain distance resolution

1m

Distance accuracy

±(0.2+2*sample resolution+2*10-5*measurement distance)(m)

Strain measurement accuracy


±50με(10-20ns) 
±10με(50-200ns)


Strain measurement repeatability

≤±100με

Strain measurement range

-15000~+15000(με)

Measurement range

0.5,1,2,5,10,20,40,80km

Pulse width

10,20,50,100,200ns

Average time setting

210~224

Readout resolution

0.05m

Sampling points

20000

Refractive index setting

1.00000-1.99999;0.00001step

Measurement frequency span

1,2,5,10,20,50MHz

Measurement frequency range

9.9GHz~12.0GHz

Display

10.4-inch TFT,1024*768 resolution

Interface Language

Simplified Chinese /English

Interface

VGA,RS232C,USB,Ethernet,earphone

Optical connector

FC/APC(conveniently replaced by SC or ST connector)

VFL

650nm±30nm,2mw(Typical);operation mode:CW,1Hz,2Hz

Power Supply

AC power:100 ~ 242VAC(1.5A),50/60Hz

Maximum power dissipation

100W

Dimensions

435(W)*230(H)*495(D)mm

Weight

≤20kg

Environmental conditions

Operational temperature:0~+40
Storage temperature:-20~+65 
Humidity:5%-90%, no condensation


Notes: 
1. Pulse width 200ns, average times 216, frequency sweep range 200MHz, frequency sweep span 5MHz; 
2. Average times 216,frequency sweep range 200MHz, frequency sweep span 5MHz.
Accessories

No.

Name

Quantity

1

Power line

1

2

Product certificate of conformity

1

3

User manual

1

4

USB interface mouse

1

5

optical transfer jumper(FC/APC to FC/UPC)

1

Typical experiment
a. Experiment of repeatability of strain measurement


Optical fiber strain due to the stretching can be found obviously at the location of 0.3157km, and the strain is about 4992.6με .


The right figure shows the successive 10 times strain measurementresults using IDP6420, from which we can conclude the repeatability of strain measured by IDP6420 is excellent.


b. Distributed strain of optical fiber ring In the process of developing and producing of FOG, IDP6421BOTDR can be used to measuring the distributed strain of optical fiber ring of FOG.


c. The calibration experiment of the temperature coefficient of optical fiber under test

The relation curve between Brillouin frequence shift and Temperature:
The optical fiber under test was G.652 SM. In the upper figures, the left figure shows the measurement trace of temperature range from 30 to 50with the span of 1, and the right figure shows the trace of temperature range from 50 to 90 with the span of 1(below 50) and 5(over 50). According to the left figure, it can be found out the temperature resolution of AV6419 can be 0.5 actually.
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