NEC's
φ
50
µ
InGaAs APD
µm
IN COAXIAL PACKAGE NR8501 Series
FOR 2.5Gb/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
= 2.5 GHz at M = 5
•
COAXIAL MODULE WITH SINGLE MODE FIBER (SMF)
or GI-50 Fiber
•
WITH SC CONNECTOR: Standard, FC connector: Option
(Refer to Ordering Information)
DESCRIPTION
NEC's NR8501 Series are InGaAs avalanche photo diode
(APD) coaxial modules with optical fiber pigtail. They are
designed for long wavelength 2.5 Gb/s optical communication
systems and are ideal as a reciever for Synchronous Digital
Hierarchy (SDH) system, STM-16 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
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 = 5
M = 10
M = 30
Sensitivity,
λ
= 1310 nm, M = 1
λ
= 1550 nm, M = 1
V
R
= V (@I
D
= 1
µA)
x
F
ORL
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
dB
30
28
0.7
5
UNITS
V
%/ºC
nA
nA
pF
GHz
2.5
2.5
1.0
0.80
0.81
30
MIN
40
NR8501 Series
TYP
60
0.20
7
1
0.5
3.0
3.0
1.2
0.94
0.96
40
30
5
0.75
MAX
80
S
M
A/W
Multiplication Factor,
λ
= 1310 nm, I
PO
= 1.0
µA
Notes:
V
BR
(25°C+∆T°C)-V
BR
(25°C)
1.
δ
=
∆T°C
•
V
BR
(25°C)
X
2. F = M
California Eastern Laboratories
CEL [ CALIFORNIA EASTERN LABS ]
