NEC's
φ
µ
φ50
µm
InGaAs APD IN COAXIAL PACKAGE
NR8500 Series
FOR 155 Mb/s AND 622 Mb/s APPLICATIONS
FEATURES
•
SMALL DARK CURRENT:
I
D
= 7 nA
•
HIGH SENSITIVITY:
S = 0.94 A/W at
λ
= 1310 nm, M = 1
S = 0.96 A/W at
λ
= 1550 nm, M = 1
•
HIGH SPEED RESPONSE:
f
C
= 1.5 GHz at M = 10
•
COAXIAL MODULE WITH SMF or GI-50 FIBER
•
WITH SC CONNECTOR: Standard
FC CONNECTOR: Option
DESCRIPTION
NEC's NR8500 series is an InGaAs avalanche photo diode
(APD) coaxial module with optical fiber pigtail. This module is
designed for long wavelength optical communication systems
and is ideal as a reciever for Synchronous Digital Hierarchy
(SDH) system, STM-4 and STM-1, ITU-T recommendations.
ELECTRO-OPTICAL CHARACTERISTICS
(T
C
= 25°C, Unless otherwise specified)
PART NUMBER
SYMBOLS
V
BR
δ
1
I
D
I
DM
C
t
f
C
S
M
x
F
ORL
PARAMETERS AND CONDITIONS
Reverse Breakdown Voltage, I
D
=100
µA
Temperature Coefficient of Reverse Breakdown Voltage
Dark Current, V
R
= V
BR
x 0.9
Multiplied Dark Current, M = 2 to 10
Terminal Capacitance, V
R
= V
(BR)R
x 0.9, f = 1 MHz
Cut-off Frequency, M = 10
M = 20
Sensitivity,
λ
= 1310 nm
λ
= 1550 nm
UNITS
V
%/ºC
nA
nA
pF
GHz
A/W
1.0
0.8
0.81
30
MIN
50
NR8500 Series
TYP
70
0.2
7
1
0.5
1.5
1.2
0.94
0.96
40
0.7
5
dB
30
28
30
5
0.75
MAX
90
Multiplication Factor,
λ
= 1310 nm, I
PO
= 1.0
µA
V
R
= V (@I
D
= 1
µA)
Excess Noise Factor
2
,
λ
= 1310 nm, 1550 nm,
I
PO
=1.0
µA,
M = 10, f = 35 MHz, B = 1 MHz
Excess Noise Factor
2
,
λ
= 1310 nm, 1550 nm,
I
PO
=1.0
µA,
M = 10, f = 35 MHz, B = 1 MHz
Optical Return Loss
SMF
GI-50 Fiber
Note:
V
BR
(25°C+∆T°C)-V
BR
(25°C)
1.
δ
=
∆T°C
•
V
BR
(25°C)
2. F = M
X
California Eastern Laboratories
CEL [ CALIFORNIA EASTERN LABS ]
