NEC's 1550 nm
InGaAsP MQW DFB LASER DIODE
IN COAXIAL PACKAGE
FOR 155 Mb/s AND 622 Mb/s APPLICATIONS
NX8503BG-CC
NX8503CG-CC
FEATURES
•PEAK EMISSION WAVELENGTH:
λP = 1550 nm
•OPTICAL OUTPUT POWER:
Pf = 2.0 mW
•LOW THRESHOLD CURRENT:
ITH = 15 mA @ TC = 25°C
•InGaAs MONITOR PIN-PD
•WIDE OPERATING TEMPERATURE RANGE:
TC = -10 to +85°C
•WITH SC-UPC CONNECTOR
•BASED ON TELCORDIA RELIABILITY
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.
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.
DESCRIPTION
PART NUMBER NX8300BG-CC, NX8300CG-CC
SYMBOLS PARAMETERS AND CONDITIONS UNITS MIN TYP MAX
PfOptical Output Power from Fiber, CW mW 2.0
VOP Operating Voltage, Pf = 2.0 mW V 1.1 1.6
ITH Threshold Current TC = +25°CmA 15 25
mA 2 50
PTH Threshold Output Power, IF = ITH µW100
IMOD Modulation Current Pf = 2.0 mW, TC = 25°CmA 15 25 40
Pf = 2.0 mW mA 13 60
ηdDifferential Efficiency Pf = 2.0 mW, TC = 25°CW/A 0.050 0.080 0.130
Pf = 2.0 mW W/A 0.030 0.150
∆ηdTemperature Dependence of Differential Efficiency, dB -3 -1.6
Kink Kink, Pf = Up to 2.4 mW (Refer to defenitions) % ±20
λpPeak Emission Wavelength, Pf = 2.0 mW nm 1530 1550 1570
∆λ/∆TTemperature Dependence of Peak Emission Wavelength nm/°C0.1 0.12
∆λ Spectral Width, Pf = 2.0 mW, -20 dB down width nm 0.3 1.0
SMSR Side Mode Suppression Ratio, Pf = 2.0 mW dB 30 40
fcCut-off Frequency, -3 dB, VR = 5 V, Pf = 2.0 mW GHz 2.0
trRise Time, 10 to 90%, Ppk = 2.0 mW, IF = ITH ns 0.5
tfFall Time, 90 to 10%, Ppk = 2.0 mW, IF = ITH ns 0.5
ImMonitor Current, VR = 5 V, Pf = 2.0 mW µA 200 1000 2000
IDMonitor Dark Current VR = 5 V, TC = 25 °CnA 1.0 50
VR = 5 V nA 10 500
ELECTRO-OPTICAL CHARACTERISTICS (TC = -10 to +85°C, unless otherwise specified)
∆η
d
= 10 log η
d
(@ T
C
°C)
η
d
(@ 25 °C)
continued next page
California Eastern Laboratories
ABSOLUTE MAXIMUM RATINGS1
(TC = -20 to +85°C, unless otherwise specified)
SYMBOLS PARAMETERS UNITS RATINGS
IFForward Current of LD mA 150
PfOptical Output Power mW 5.0
from Fiber
VRReverse Voltage of LD V 2.0
IFForward Current of PD mA 2.0
VRReverse Voltage of PD V 15
TCOperating Case Temperature °C-10 to +85
TSTG Storage Temperature °C-40 to +85
TSLD Lead Soldering
Temperature (10 s) °C260
RH Relative Humidity % 85
(non-condensing)
Note:
1. Operation in excess of any one of these parameters may result
in permanent damage.
NX8503BG-CC, NX8503CG-CC
PART NUMBER NX8503BG-CC, NX8503BG-CC
SYMBOLS PARAMETERS AND CONDITIONS UNITS MIN TYP MAX
CtMonitor PD Terminal Capacitance, VR = 5 V, f = 1 MHz pF 1.0 20
LINmLinearity, VR = 5 V, Pf = 0.2 to 2.0 mW (Refer to defenitions) % 10
γTracking Error, Im = const. (Refer to defenitions) dB 0.5 1.0
RIN Relative Intensity Noise, Ref = -14dB dB/Hz -135
ELECTRO-OPTICAL CHARACTERISTICS cont. (TC = -10 to +85°C, unless otherwise specified)
NX8503BG-CC, NX8503CG-CC
PARAMETER DEFINITIONS
3.0
2.0
1.0
020 40 60 80 100
T
C
= -10 ºC
+25 ºC
+85 ºC
OPTICAL OUTPUT POWER vs.
FORWARD CURRENT OPTICAL OUTPUT POWER vs.
MONITOR CURRENT
3.0
2.0
1.0
0.0 0.4 0.8 1.2
TC = –10 ºC
+85 ºC
+25 ºC
Forward Current IF (mA)
Optical Output Power P
I
(mW)
Monitor Current IF (mA)
Optical Output Power P
I
(mW)
2.4
P
K
0
I
F
- P
f
dP
o
dP
K
I
F -
η
d
I
F
(mA)
(mW)
P
f
kink = x 100 [%]
|dPK|
PK
dPK = dPo MAX
PK ≤ 2.4 (mW)
Kink : kink
P
K
0
dP
o
dP
L
P
f
I
m
(mA)
(mW)
0.2
PL
2.0
LINm = x 100 [%]
|dPL|
PL
dPL = dPo MAX
0.2 < PL < 2.0 (mW)
Linearity : LINm
0
P
f
I
m
I
m
(mA)
(mW)
P
f
2.0
T
C
= 25°C
T
C
= -10 to +85C
γ = |10 log | [dB]
Pf
2.0
Tracking Error : γγ
γγ
γ
TYPICAL CHARACTERISTICS (TC = 25 ºC, Unless otherwise specified)
NX8503BG-CC, NX8503CG-CC
TYPICAL CHARACTERISTICS (TC = 25 ºC, Unless otherwise specified)
Case Temperature Tc (ºC)
Peak Emission Wavelenght η
p
(nm)
1565
1560
1555
1550
1545
-40 -20 0 20 40 60 80 100
TEMPERATURE DEPENEDENCE OF
DIFFERNTIAL EFFICIENCY
Case Temperature Tc (ºC)
Differemtial Effieciency η
d
(W/A)
0.06
0.00
-40 -20 0
0.18
0.12
20 40 60 80 100
TEMPERATURE DEPENEDENCE OF
PEAK EMISSION WAVELENGHT
OPERATING CURRENT AND THRESHOLD CURRENT
vs. CASE TEMPERATURE
Case Temperature Tc (ºC)
Operating Current I
op
(mA)
Threshold Curent I
th
(mA)
Forward Voltage VF (V)
Forward Current I
F
(mA)
100
10
1
-40 -20 020 40 60 80 100
I
th
I
op
@
P
r
= 2 mW
0
10
0.5 1.0 1.5 2.0 2.5
20
30
40
50
FORWARD CURRENT vs.
FORWARD VOLTAGE
SPECTRUM
Wavelength λ (nm)
Relative Intensity (dB)
1565.01555.0
1545.0
10
0
-10
-20
-30
-40
-50
-60
-70
REMARK The graphs indicate nominal charachteristics.
PART NUMBER AVAILABLE CONNECTOR FLANGE TYPE
NX8503BG-CC With SC-UPC Connector
NX8503CG-CC
ORDERING INFORMATION
Flat Mount Flange
PARAMETER SPEC UNIT
Mode Field Doameter 9.5±1µm
Cladding Diameter 125±2µm
Maximum Cladding Noncircularity 2 %
Maximum Core/Cladding Concentricity 1.6 %
Outer Diameter 0.9±0.1 mm
Cut-off Wavelength 1100 to 1270 nm
Minimum Fiber Bending Radius 30 mm
Fiber Length 500±50 MIN mm
Flammability UL1581 VW-1
OPTICAL FIBER CHARACTERISTICS
35±2 mm
Fiber Length: 500±50 mm
SC-UPC Connector
8.99±0.5 mm
OUTLINE DIMENSIONS (Units in mm)
ø0.9
Optical Fiber (SMF)
Length: 0.5 m
With SC Connector
8.0±0.3
ø7.0±0.2
4.0±0.2 2.2 3.2
ø2.2 ø0.45±0.05
18.3±1.0
25.5±1.0
1.2±0.2
20.0±1.0
12.7±0.2
17.0±0.2
P.C.D. = ø2.0
7.2±0.3
3.7±0.3
1.0±0.1
PD
LD
4
1
3
2
CASE
6.0
ø0.9
Optical Fiber (SMF)
Length: 0.5 m
With SC Connector
8.0±0.3
0.5±0.3
ø7.0±0.2
ø0.45±0.05
15.0
7.3
0.5
28.3±1.0
19.5±1.0
16.0
6.0
PD
32
LD
4 1
CASE
P.C.D. = ø2.0
4–R1.25±0.2
2–ø2.5 8.5±0.2
1
2
34
12.0±0.15
7.0±0.2
NX8503BG-CC, NX8503CG-CC
Vertical Mount
Flange
NX8503BG-CC NX8503CG-CC
PIN CONNECTIONS PIN CONNECTIONS
Life Support Applications
These NEC products are not intended for use in life support devices, appliances, or systems where the malfunction of these products can reasonably be expected
to result in personal injury. The customers of CEL using or selling these products for use in such applications do so at their own risk and agree to fully indemnify
CEL for all damages resulting from such improper use or sale.
A Business Partner of NEC Com
p
ound Semiconductor Devices, Ltd
.
03/03/2003
