NEC's 1550 nm
InGaAsP MQW DFB LASER DIODE
IN COAXIAL PACKAGE
NX8503BG-CC
NX8503CG-CC
FOR 155 Mb/s AND 622 Mb/s APPLICATIONS
FEATURES
DESCRIPTION
NEC's NX8503BG-CC and NX8503CG-CC are 1550 nm Co-
axial Module DFB (Distributed Feed-Back) laser diode with
single mode fiber. Multiple Quantum Well (MQW) structure is
adopted to achieve stable dynamic single longitudinal mode
operation over a wide temperature range of -10 to +85°C.
• PEAK EMISSION WAVELENGTH:
λP = 1550 nm
• OPTICAL OUTPUT POWER:
Pf = 2.0 mW
• LOW THRESHOLD CURRENT:
ITH = 15 mA @ TC = 25°C
The module is ideal as a light source for Synchronous Digital
Hierarchy (SDH) system, STM-1, log-haul L-1.2, L-1.3 and
STM-4, long-haul L-4.2, L-4.3 ITU-T recommendations.
• 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
NX8300BG-CC, NX8300CG-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
15
13
25
40
60
ηd
Differential Efficiency
Pf = 2.0 mW, TC = 25°C
Pf = 2.0 mW
W/A
W/A
0.050
0.030
0.080
-1.6
0.130
0.150
∆ηd
Temperature Dependence of Differential Efficiency,
(@ T °C)
(@ 25 °C)
dB
-3
η
η
d
C
∆ηd = 10 log
d
Kink
Kink, Pf = Up to 2.4 mW (Refer to defenitions)
Peak Emission Wavelength, Pf = 2.0 mW
%
±20
1570
0.12
1.0
λp
nm
1530
30
1550
0.1
0.3
40
∆λ/∆T
Temperature Dependence of Peak Emission Wavelength nm/°C
∆λ
Spectral Width, Pf = 2.0 mW, -20 dB down width
Side Mode Suppression Ratio, Pf = 2.0 mW
Cut-off Frequency, -3 dB, VR = 5 V, 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
SMSR
fc
tr
GHz
ns
2.0
0.5
0.5
tf
ns
Im
ID
µA
200
1000
2000
Monitor Dark Current
VR = 5 V, TC = 25 °C
nA
nA
1.0
10
50
500
VR = 5 V
continued next page
California Eastern Laboratories
