OBR4600 datasheet(2/4 Pages) ETC2

2 / 4 page

OBRTM is a trademark of Luna Innovations Incorporated.

©Luna Innovations Incorporated, Roanoke, VA

OBR 4600

LTOBR4600 REV. 004 02/13/2014

PARAMETER

SPECIFICATION

UNITS

Maximum Device Length:

Standard Mode

30 or 70

meters

Long Range Mode12

2000

meters

Spatial Resolution (two-point)1:

10 µm over 30 meters

20 µm over 70 meters

1 mm over 2 km

Dead Zone:

Equals 2-pt spatial resolution

Wavelength Range2:

1270-1340 or 1525-1610

Wavelength:

Resolution (max)

0.02

Accuracy3

±1.5

Integrated Return Loss Characteristics:

Dynamic range4

Total range

0 to -125

Sensitivity

-130

Resolution5

±0.05

Accuracy5

±0.10

Integrated Insertion Loss Characteristics:

Dynamic range6

Resolution5

±0.05

Accuracy5

±0.10

Group Delay:

Accuracy

1.0

Distributed Sensing7,12,13:

Spatial Resolution8

±1.0

Temperature Resolution9

±0.1

Strain Resolution9

±1.0

µstrain

Measurement Timing10

Standard

Fast11

Spot Scan11

5 nm scan time

1.6

0.3

Time vs. wavelength range

2.1 s+0.14 s/nm

1.3 s+0.06 s/nm

0.15 s+0.02 s /nm

Long Range (2 km) Scan Time

Specifications are for single-mode operation.

For multimode operation, specifications are nominal.

Over entire length range.

Ranges are nominal.

Accuracy maintained by an internal NIST-traceable HCN

gas cell.

For the 2000 m option, return loss dynamic range is 60 dB.

With integration width of 0.5 m

The insertion loss dynamic range is the one-way loss

that can be suffered before the scatter level of standard

SMF (~ -100 dB/mm) is lower than the noise floor

(~ -118 dB/mm).

Distributed sensing uses Rayleigh spectral shift method

and is relative to reference scan.

Spatial resolutions listed are ideal to get the temperature

and strain resolutions listed; they are not minimums or

maximums.

Temperature and strain resolutions are calculated from

spectral shift of Rayleigh scatter using 1 GHz = 0.8 C

6.58 µStrain. [Othonos and K. Kalli, Fiber Bragg

Gratings (Artech House, Boston, 1999)].

Combined scan and analysis time in high-resolution

mode. Times are for 30 m scan mode.

Times are with laser tuning speed set at 100 nm/s.

Extended range mode and distributed sensing are

upgrade options

Maximum standard sensing length is 70m. Limited

sensing is available in extended range mode. Contact

your Luna representative for more information.

CLASS 1 LASER PRODUCT

SpecificationsT

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