2
Plastic Optical Fiber Specifications: HFBR-R/EXXYYY
Absolute Maximum Ratings
Parameter
Symbol
T
S,O
T
O
T
I
F
T
F
T
r
r
F
T
Min.
-55
-40
-20
Max.
+85
+85
+70
50
100
Unit
°
C
°
C
°
C
N
N
mm
mm
N
Cycles
Note
Storage and Operating Temperature
Recommended Operating Temperature
Installation Temperature
Short Term Tensile
Force
1
2
Single Channel
Dual Channel
Short Term Bend Radius
Long Term Bend Radius
Long Term Tensile Load
Flexing
25
35
3, 4
1
1000
4
Mechanical/Optical Characteristics, T
A
= -40 to +85
°
C unless otherwise specified.
Parameter
Symbol
Cable
Standard Cable,
α
O
Attenuation
Type "R"
Extra Low Loss,
Type "E"
Reference
Standard Cable,
α
R
Attenuation
Type "R"
Extra Low Loss,
Type "E"
Numerical Aperture
NA
Diameter, Core and Cladding
D
C
Diameter, Jacket
D
J
Propagation Delay Constant
l/v
Mass per Unit Length/Channel
Cable Leakage Current
I
L
Refractive Index
Core
n
Cladding
Min.
0.15
Typ.
[5]
0.22
Max.
0.27
Unit
dB/m
Condition
Source is HFBR-15XX
(660 mm LED, 0.5 NA)
= 50 meters
0.15
0.19
0.23
0.12
0.19
0.24
dB/m
Source is 650 nm,
0.5 NA monochrometer,
= 50 meters
Note 7, Figure 1
>2 meters
0.12
0.16
0.19
0.46
0.94
2.13
0.47
1.00
2.20
5.0
5.3
12
1.492
1.417
0.50
1.06
2.27
mm
mm
ns/m
g/m
nA
Simplex Cable
Note 6
Without Connectors
50 kV,
= 0.3 meters
Notes:
1. Installation temperature is the range over which the cable can be bent and pulled
without damage. Below -20
°
C the cable becomes brittle and should not be subjected to
mechanical stress.
2. Short Term Tensile Force is for less than 30 minutes.
3. Short Term Bend Radius is for less than 1 hour nonoperating.
4. 90
°
bend on 25 mm radius mandrel. Bend radius is the radius of the mandrel around
which the cable is bent.
5. Typical data are at 25
°
C.
6. Propagation delay constant is the reciprocal of the group velocity for propagation delay
of optical power. Group velocity is v=c/n where c is the velocity of light in free space
(3xl0
8
m/s) and n is the effective core index of refraction.
7. Note that
α
R
rises at the rate of about 0.0067 dB/
°
C, where the thermal rise refers to
the LED temperature changes above 25
°
C. Please refer to Figure 1 which shows the
typical plastic optical fiber attenuation versus wavelength at 25
°
C.