(Model OBR 4600)

www.lunainc.com

solutions@lunainc.com

Support phone: 1.866.586.2682

1

Extended range sensing works best with a low net change in accumulated strain between the unit and the sensing region.

2

Internal wavelength calibration using a NIST-traceable HCN gas cell occurs upon instrument configuration, but may drift with

temperature. Wavelength offset measured at 1550nm. Thermal drift,

3

Based on maximum wavelength range of 3.2 nm.

4

Actual temperature range will be limited by the sensing fiber used.

5

Temperature accuracies are calculated from the wavelength accuracy using the spectral shift of Rayleigh scatter, 1 GHz = 0.8 °C

= 6.

58 µε. [Othonos and K. Kalli, Fiber Bragg Gratings (Artech House, Boston, 1999)].

6

Larger gage lengths may be required to meet noise specifications in the presence of vibration.

PARAMETER

SPECIFICATION

UNITS

Maximum Range

2,000

meters

Spot Scan Size

80

meters

Maximum Wavelength Range

3.2

nm

Time Per Scan

6.5

seconds

2-pt Spatial Resolution

0.25

mm

± 5.0

+ 12*ΔT

pm

± 1,250

µStrain

± 4.1 + 9.9

*ΔT

µStrain

± 175

°C

± 0.5 + 1.2

*ΔT

°C

3

cm

Minimum Sensor Spacing

0.6

mm

The

Extended

Range

Interrogation

capability is available on the OBR 4600

with purchase of the extended range

mode and spot scan mode. To perform

strain and temperature measurements,

the distributed sensing option is required

in addition to the above. This capability

extends

strain

and

temperature

measurements up to a range of 2 km for

applications located in a benign vibration

environment.

APPLICATIONS

•

Evaluating spools of Fiber Bragg

Gratings

•

Evaluating optical networks and

devices

•

Strain and temperature at a distance