Obr 4600 – Luna OBR 4600 User Manual
Page 2
OBR
TM
is a trademark of Luna Innovations Incorporated.
©Luna Innovations Incorporated, Roanoke, VA
All rights reserved.
OBR 4600
LTOBR4600 REV. 004 02/13/2014
PARAMETER
SPECIFICATION
UNITS
Maximum Device Length:
Standard Mode
30 or 70
meters
Long Range Mode
12
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 Range
2
:
1270-1340 or 1525-1610
nm
Wavelength:
Resolution (max)
0.02
pm
Accuracy
3
±1.5
pm
Integrated Return Loss Characteristics:
Dynamic range
4
70
dB
Total range
0 to -125
dB
Sensitivity
-130
dB
Resolution
5
±0.05
dB
Accuracy
5
±0.10
dB
Integrated Insertion Loss Characteristics:
Dynamic range
6
18
dB
Resolution
5
±0.05
dB
Accuracy
5
±0.10
dB
Group Delay:
Accuracy
1.0
ps
Distributed Sensing
7,12,13
:
Spatial Resolution
8
±1.0
cm
Temperature Resolution
9
±0.1
C
Strain Resolution
9
±1.0
µstrain
Measurement Timing
10
Standard
Fast
11
Spot Scan
11
5 nm scan time
3
1.6
0.3
s
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
20
s
Specifications are for single-mode operation.
For multimode operation, specifications are nominal.
1
Over entire length range.
2
Ranges are nominal.
3
Accuracy maintained by an internal NIST-traceable HCN
gas cell.
4
For the 2000 m option, return loss dynamic range is 60 dB.
5
With integration width of 0.5 m
6
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).
7
Distributed sensing uses Rayleigh spectral shift method
and is relative to reference scan.
8
Spatial resolutions listed are ideal to get the temperature
and strain resolutions listed; they are not minimums or
maximums.
9
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)].
10 Combined scan and analysis time in high-resolution
mode. Times are for 30 m scan mode.
11 Times are with laser tuning speed set at 100 nm/s.
12 Extended range mode and distributed sensing are
upgrade options
13 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