NEC's 1550 nm
InGaAsP MQW DFB
LASER DIODE IN COAXIAL PACKAGE
for 622 Mb/s APPLICATION
NX8504BE-CC
NX8504CE-CC
FEATURES
DESCRIPTION
• PEAK EMISSION WAVELENGTH:
λP = 1550 nm
NEC's NX8504BE-CC and NX8504CE-CC are 1550 nm Dis-
tributed Feed-Back (DFB) laser diode coaxial modules with
optical isolator.
• OPTICAL OUTPUT POWER:
Pf = 2.0 mW
These modules are ideal as a light source for Synchronous
DigitalHierarchy(SDH)system, STM-4, long-haulL-4.2, L-4.3
ITU-T recommendations.
• INTERNAL OPTICAL ISOLATOR
• InGaAs MONITOR PIN-PD
• WIDE OPERATING TEMPERATURE RANGE:
TC = -10 to +85°C
• WITH SC-UPC CONNECTOR
• BASED ON TELCORDIA RELIABILITY
ELECTRO-OPTICAL CHARACTERISTICS (TC = -10 to +85°C, unless otherwise specified)
PART NUMBER
NX8504BE-CC, NX8504CE-CC
SYMBOLS
PARAMETERS AND CONDITIONS
Optical Output Power from Fiber, CW
Operating Voltage, Pf = 2.0 mW
UNITS
mW
V
MIN
TYP
2.0
1.1
15
MAX
Pf
VOP
ITH
1.6
Threshold Current
TC = +25°C
mA
mA
25
50
2
PTH
Threshold Output Power, IF = ITH
µW
100
IMOD
Modulation Current
Pf = 2.0 mW, TC = 25°C
Pf = 2.0 mW
mA
mA
11
9
20
35
55
ηd
Differential Efficiency
Pf = 2.0 mW, TC = 25°C
Pf = 2.0 mW
W/A
W/A
0.060
0.036
0.100
-1.6
0.150
0.200
∆ηd
Temperature Dependence of Differential Efficiency,
(@ T °C)
(@ 25 °C)
dB
-3
η
η
d
C
∆ηd = 10 log
d
Kink
λp
Kink, Pf = Up to 2.4 mW (Refer to defenitions)
Peak Emission Wavelength, Pf = 2.0 mW
%
±20
1570
0.12
1.0
nm
1530
30
1550
0.10
0.3
∆λ/∆T
∆λ
Temperature Dependence of Peak Emission Wavelength nm/°C
Spectral Width, Pf = 2.0 mW, -20 dB down width
Side Mode Suppression Ratio, Pf = 2.0 mW
Rise Time, 10 to 90%, Ppk = 2.0 mW, IF = ITH
Fall Time, 90 to 10%, Ppk = 2.0 mW, IF = ITH
Monitor Current, VR = 5 V, Pf = 2.0 mW
nm
dB
ns
SMSR
tr
40
0.5
0.5
tf
ns
Im
µA
200
1000
2000
ID
Monitor Dark Current
VR = 5 V, TC = 25 °C
VR = 5 V
nA
nA
1.0
10
50
500
Ct
LINm
γ1
Monitor PD Terminal Capacitance, VR = 5 V, f = 1 MHz
Linearity, VR = 5 V, Pf = 0.2 to 2.0 mW (Refer to defenitions)
Tracking Error, Im = const. (Refer to defenitions)
pF
%
1.0
20
10
dB
0.5
1.0
California Eastern Laboratories