LASER DIODE
NX8311UD
1 310 nm FOR LONG HAUL 2.5 Gb/s
InGaAsP MQW-DFB LASER DIODE TOSA
DESCRIPTION
The NX8311UD is a 1 310 nm Multiple Quantum Well (MQW) structured
Distributed Feed-Back (DFB) laser diode TOSA (transmitter optical sub-
assembly) with InGaAs monitor PIN-PD in a receptacle type package
designed for SFF/SFP transceiver with LC duplex receptacle.
5.0 mm
FEATURES
Applications
STM-16 (L-16.1), SONET OC-48 (LR)
Internal optical isolator
Optical output power
P
f
= 2.0 mW
Low threshold current
l
th
= 10 mA TYP. @ T
C
= 25
C
Wide operating temperature range T
C
=
-
20 to +85
C
InGaAs monitor PIN-PD
Small
package
3.8 mm TOSA (Total length 12.0 mm MAX.)
NEC Compound Semiconductor Devices 2002,
The mark shows major revised points.
Document No. PL10181EJ02V0DS (2nd edition)
Date Published July 2003 CP (K)
NX8311UD
PACKAGE DIMENSIONS (UNIT: mm)
BOTTOM VIEW
1
4
3
2
PIN CONNECTIONS
1 (CASE)
4
3
2
LD
PD
4.0450.05
6.990.2
12.0 MAX.
6.50.5
0.550.05
1.10.05
(1.1)
(2.55)
1.0
P.C.D
OPTICAL
REFERENCE
PLANE
2.92
+0.05
0.17
3.40.03
1.43
4 0.3
3.8
4.750.1
Data Sheet PL10181EJ02V0DS
2
NX8311UD
ORDERING INFORMATION (Solder Contains Lead)
Part Number
Package
Pin Connections
NX8311UD
3.8 mm TOSA
1
4
3
2
LD
PD
ORDERING INFORMATION (Pb-Free)
Part Number
Package
Pin Connections
NX8311UD-AZ*
3.8 mm TOSA
1
4
3
2
LD
PD
*NOTE:
Please refer to the last page of this data sheet, "Compliance with EU Directives" for
PB-Free RoHS Compliance Information.
ABSOLUTE MAXIMUM RATINGS
Parameter Symbol
Ratings
Unit
Optical Output Power from Fiber
P
f
5.0 mW
Forward Current of LD
I
F
150 mA
Reverse Voltage of LD
V
R
2.0 V
Forward Current of PD
I
F
2.0 mA
Reverse Voltage of PD
V
R
15 V
Operating Case Temperature
T
C
-
20 to +85
C
Storage Temperature
T
stg
-
40 to +85
C
Lead Soldering Temperature
T
sld
350 (3 sec.)
C
Data Sheet PL10181EJ02V0DS
3
NX8311UD
ELECTRO-OPTICAL CHARACTERISTICS (T
C
=
-
20 to +85
C, unless otherwise specified)
Parameter Symbol Conditions MIN.
TYP.
MAX.
Unit
Operating Voltage
V
op
CW,
P
f
= 2.0 mW
1.2
1.6
V
Threshold Current
I
th
CW,
2
50 mA
CW,
T
C
= 25
C 4
10
20
Optical Output Power from Fiber
P
f
CW
2.0
mW
Modulation Current
I
mod
CW,
P
f
= 2.0 mW
7
50
mA
CW, P
f
= 2.0 mW, T
C
= 25
C 9
20
30
Differential Efficiency
d
CW, P
f
= 2.0 mW
0.04
0.29
W/A
CW, P
f
= 2.0 mW, T
C
= 25
C
0.07 0.10 0.20
Peak Emission Wavelength
p
CW, P
f
= 2.0 mW, RMS (
-
20 dB)
1 280
1 335
nm
Side Mode Suppression Ratio
SMSR
CW, P
f
= 2.0 mW
30
dB
Rise Time
t
r
I
b
= I
th,
10-90%
200
ps
Fall Time
t
f
I
b
= I
th,
90-10%
200
ps
Monitor Current
I
m
CW,
V
R
= 1.5 V, P
f
= 1.0 mW
100
2 000
A
Monitor Dark Current
I
D
V
R
= 1.5 V
500
nA
V
R
= 1.5 V, T
C
= 25
C
50
Tracking Error
*1
CW, I
m
= const. (@ P
f
= 2.0 mW)
-
1.0 1.0 dB
Connector Repeatability
-
With master pigtail
-
1.0 1.0 dB
Optical Isolation
I
s
CW,
P
f
= 2.0 mW
20
dB
*1 Tracking Error:
0
I
m
I
m
T
C
= 25C
T
C
= 20 to +85C
P
f
(mW)
P
f
2.0
(mA)
= 10 log
[dB]
P
f
2.0
Data Sheet PL10181EJ02V0DS
4
NX8311UD
TYPICAL CHARACTERISTICS (T
C
= 25
C, unless otherwise specified)
SPECTRUM
Relative Intensity
Wavelength
(nm)
1 308
1 298
1 318
T
C
= 25C
FORWARD VOLTAGE vs.
FORWARD CURRENT
Forward Voltage V
F
(V)
Forward Current I
F
(mA)
2.5
1.5
1.0
0.5
0
2.0
20
40
60
80
100
T
C
= 20C
+25C
+85C
20C
T
C
= +85C
+25C
FIBER vs. FORWARD CURRENT
OPTICAL OUTPUT POWER FROM
Optical Output Power from Fiber P
f
(mW)
Forward Current I
F
(mA)
2.5
2.0
1.5
1.0
0.5
0
20
40
60
80
100
+25C
T
C
= 20C
+85C
Remark The graphs indicate nominal characteristics.
Data Sheet PL10181EJ02V0DS
5
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