LASER DIODE
NX8571 Series
1 550 nm CW LIGHT SOURCE
InGaAsP MQW-DFB LASER DIODE MODULE
WITH WAVELENGTH MONITOR
DESCRIPTION
The NX8571 Series is a 1 550 nm Multiple Quantum Well (MQW)
structured Distributed Feed-Back (DFB) laser diode module with wavelength
monitor function. This device is temperature tunable over 4
50 GHz
channels. Available at both C-band (1530.334 to 1565.087 nm) and L-band
(1565.496 to 1608.760 nm) ITU-T grid wavelengths.
This device is designed as CW light source and ideal for transmission
systems in which external modulators are used.
FEATURES
Wavelength monitor function (Etalon Filter, Wavelength monitor PD)
Optical output power: P
f
= 10 mW MIN.
Available for DWDM wavelengths based on ITU-T recommendations
(50 GHz grid)
4-channel wavelength tunable capability for 50 GHz-spacing
(NX8571S
D)
Internal thermo-electric cooler and isolator
Hermetically sealed 14-pin butterfly package
Polarization maintain fiber pigtail
Document No. PL10136EJ03V0DS (3rd edition)
Date Published June 2004 CP (K)
NEC Compound Semiconductor Devices, Ltd. 2002, 2004
The mark shows major revised points.
NX8571 Series
PACKAGE DIMENSIONS (UNIT: mm)
TOP VIEW
PD (
p
)
+
LD
#8
#14
#7
#1
PD (P
f
)
Cooler
Thermistor
PIN CONNECTIONS
Pin No.
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Function
Function
Thermistor
Thermistor
LD Cathode
PD (P
f
) Anode
PD Cathode
Cooler Anode
Cooler Cathode
GND
GND
PD (
p
) Anode
LD Anode
LD Cathode
LD Anode
NC
29.970.25
8.20.2
5.4
5.15
0.3
1.0
Optical Fiber (PMF)
Length: 1 000 MIN.
20.830.25
26.040.25
7
8
1
14
8.890.13
10 MIN.
15.24
21.80.3
1.0
0.8
12.70.2
1.25
2.54
0.5
4 2.67
5.0
0.9
6.00.2
OPTICAL FIBER CHARACTERISTICS
Parameter Specification
Unit
Outer Diameter
0.9
0.1 mm
Minimum Fiber Bending Radius
25
mm
Fiber Length
1 000 MIN.
mm
Fiber Length: 1 000 mm MIN.
FC-PC Connector
PMF
Data Sheet PL10136EJ03V0DS
2
NX8571 Series
ABSOLUTE MAXIMUM RATINGS
Parameter Symbol
Ratings
Unit
Forward Current of LD
I
F
300 mA
Reverse Voltage of LD
V
R
2.0 V
Forward Current of PD
I
F
10 mA
Reverse Voltage of PD
V
R
20 V
Operating Case Temperature
T
C
-
20 to +70
C
Storage Temperature
T
stg
-
40 to +85
C
Lead Soldering Temperature
T
sld
260 (10 sec.)
C
ELECTRO-OPTICAL CHARACTERISTICS (T
LD
= T
set
, T
C
=
-
5 to +70
C, unless otherwise specified)
Parameter Symbol Conditions MIN.
TYP.
MAX.
Unit
Laser Set Temperature
T
set
Single
channel
20 35
C
4 channel tunable
10
45
Forward Voltage
V
F
P
f
= 10 mW
0.9
1.2
2.5
V
Threshold Current
I
th
20 40 mA
Operation Current
I
op
P
f
= 10 mW
70
125
mA
Optical Output Power from Fiber
P
f
I
F
= 125 mA, T
LD
= T
set
10
mW
Peak Emission Wavelength
p
P
f
= 10 mW, CW, T
LD
= T
set
1
530
ITU-T
*1
1 609
nm
Wevelength Stability
-
T
LD
= T
set
, applicable to wavelength
monitor, E.O.L
-
20 +20
pm
Spectral Line Width
P
f
= 10 mW, CW, 3 dB down
1
2
MHz
Side Mode Suppression Ratio
SMSR
P
f
= 10 mW, CW
35
45
dB
Relative Intensity Noise
RIN
P
f
= 10 mW, 20 MHz to 3 GHz
-
150 dB/Hz
Optical Isolation
I
s
P
f
= 10 mW, CW
30
dB
Polarization Extinction Ratio
*2
ext P
f
= 10 mW, CW
20
dB
*1 Available for DWDM wavelengths based on ITU-T recommendations (50 GHz grid).
Please refer to Table A.
*2 Polarization state of LD is aligned parallel to the slow axis.
Data Sheet PL10136EJ03V0DS
3
NX8571 Series
ELECTRO-OPTICAL CHARACTERISTICS (Applicable to Monitor PD: T
LD
= T
set
, T
C
=
-
5 to +70
C)
Parameter Symbol Conditions MIN.
TYP.
MAX.
Unit
Monitor Current (P
f
Monitor)
I
m
(P
f
) P
f
= 10 mW, V
R
= 5 V
20
200
A
Monitor Current (
p
Monitor)
I
m
(
p
) P
f
= 10 mW, V
R
= 5 V, Locking point
10
100
A
Operation Region
*1
I
m
(
)
25 75 %
1
-
2
90
pm
Discrimination Slope
*1
0.05
A/pm
Dark Current
I
D
V
R
= 5 V
2
10
nA
Tracking Error
*2
I
m
= const.
0.5
dB
*1 Operation region, Discrimination slope, Slope assignment
0
I
m
(
)
I
m
@100%
I
m
(
p
)
I
m
@0%
I
1
: I
m
@75%
I
2
: I
m
@25%
1
2
p
Locking point
Negative Slope (Odd channel)
Operation region
0
I
m
(
)
I
m
@100%
I
m
(
p
)
I
m
@0%
I
2
: I
m
@75%
I
1
: I
m
@25%
1
2
p
Locking point
Positive Slope (Even channel)
Operation region
1
2
I
1
I
2
= [ A/pm]
*2 Tracking Error:
P
f
(mW)
0
I
m
I
m
T
LD
= T
set
T
LD
= T
set
, T
C
= 5 to +70C
10
P
f
= 10 log
[dB]
P
f
10
ELECTRO-OPTICAL CHARACTERISTICS
(Applicable to Thermistor and TEC: T
LD
= T
set
, T
C
=
-
5 to +70
C)
Parameter Symbol Conditions MIN.
TYP.
MAX.
Unit
Thermistor Resistance
R
T
LD
= 25
C 9.5
10.0
10.5
k
B Constant
B
T
LD
= 25
C
3 350
3 450
3 550
K
Cooler Current
I
C
T = 70
-
T
set
, P
f
= 10 mW
1.5
A
Cooler Voltage
V
C
T = 70
-
T
set
, P
f
= 10 mW
3.0
V
Data Sheet PL10136EJ03V0DS
4
NX8571 Series
ORDERING INFORMATION
NX8571SC
-BA
With FC-PC connector
Without : Single channel
D
: 4 channel tunable
Wavelength code : Refer to Table A
Package code
Table A: DWDM wavelength base on ITU-T recommendations (@ T
LD
= T
set
) (1/7)
Wavelength Code
ITU-T Wavelength
*1
Frequency Monitor
Slope
4 channel tunable
single channel (nm)
(THz)
315D 303
1530.33
195.90
Negative
307
1530.72
195.85
Positive
311
1531.11
195.80
Negative
315
1531.50
195.75
Positive
330D 318
1531.89
195.70
Negative
322
1532.29
195.65
Positive
326
1532.68
195.60
Negative
330
1533.07
195.55
Positive
346D 334
1533.46
195.50
Negative
338
1533.85
195.45
Positive
342
1534.25
195.40
Negative
346
1534.64
195.35
Positive
362D 350
1535.03
195.30
Negative
354
1535.42
195.25
Positive
358
1535.82
195.20
Negative
362
1536.21
195.15
Positive
377D 366
1536.60
195.10
Negative
370
1537.00
195.05
Positive
373
1537.39
195.00
Negative
377
1537.79
194.95
Positive
393D 381
1538.18
194.90
Negative
385
1538.58
194.85
Positive
389
1538.97
194.80
Negative
393
1539.37
194.75
Positive
*1 The value which omitted and computed the 3rd place below the decimal point
Data Sheet PL10136EJ03V0DS
5
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