DATA SHEET
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 (1 530.334 to 1 565.087 nm) and L-band
(1 565.496 to 1 608.760 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, please refer to the
ORDERING INFORMATION)
• 4 channel wavelength tunable capability for 50 GHz-spacing
(NX8571SC×××D)
• Internal thermo-electric cooler and isolator
• Hermetically sealed 14-pin butterfly package
• Polarization maintain fiber pigtail
The information in this document is subject to change without notice. Before using this document, please confirm that
this is the latest version.
Not all devices/types available in every country. Please check with local NEC Compound Semiconductor Devices
representative for availability and additional information.
Document No. PL10136EJ04V0DS (4th edition)
Date Published September 2005 CP(K)
Printed in Japan
The mark
shows major revised points.
NEC Compound Semiconductor Devices, Ltd. 2002, 2005
NX8571 Series
PACKAGE DIMENSIONS (UNIT : mm)
15.24
2.54
21.8±0.3
8.89±0.13 10 MIN.
1.25
φ
6.0±0.2
φ
0.9
φ
5.0
1.0
0.8
7
1
TOP VIEW
#7
+
–
Cooler
PD (λ
p
)
#1
12.7±0.2
PD (P
f
) Thermistor
LD
8
14
4–
φ
2.67
0.5
20.83±0.25
26.04±0.25
Optical Fiber (PMF)
Length: 1 000 MIN.
Pin No.
1
2
3
4
5
6
7
#8
#14
PIN CONNECTIONS
Function
Thermistor
Thermistor
LD Cathode
PD (P
f
) Anode
PD Cathode
Cooler Anode
Cooler Cathode
Pin No.
8
9
10
11
12
13
14
Function
GND
GND
PD (λ
p
) Anode
LD Anode
LD Cathode
LD Anode
NC
0.3
7.8±0.2
5.4
1.0
29.97±0.25
OPTICAL FIBER CHARACTERISTICS
Parameter
Outer Diameter
Minimum Fiber Bending Radius
Fiber Length
Specification
0.9±0.1
25
1 000 MIN.
Unit
mm
mm
mm
5.15
PMF
FC-PC Connector
Fiber Length: 1 000 mm MIN.
2
Data Sheet PL10136EJ04V0DS
NX8571 Series
ABSOLUTE MAXIMUM RATINGS
Parameter
Forward Current of LD
Reverse Voltage of LD
Forward Current of PD
Reverse Voltage of PD
Operating Case Temperature
Storage Temperature
Lead Soldering Temperature
Symbol
I
F
V
R
I
F
V
R
T
C
T
stg
T
sld
Ratings
300
2.0
10
20
−20
to +70
−40
to +85
260 (10 sec.)
Unit
mA
V
mA
V
°C
°C
°C
ELECTRO-OPTICAL CHARACTERISTICS (T
LD
= T
set
, T
C
=
−5
to +70°C, unless otherwise specified)
Parameter
Laser Set Temperature
Symbol
T
set
Conditions
Single channel
4 channel tunable
Forward Voltage
Threshold Current
Operation Current
Optical Output Power from Fiber
Peak Emission Wavelength
Wevelength Stability
V
F
I
th
I
op
P
f
λ
p
−
P
f
= 10 mW
I
F
= 125 mA, T
LD
= T
set
P
f
= 10 mW, CW, T
LD
= T
set
T
LD
= T
set
, applicable to wavelength
monitor, E.O.L
Spectral Line Width
Side Mode Suppression Ratio
Relative Intensity Noise
Optical Isolation
Polarization Extinction Ratio
*2
MIN.
20
10
0.9
TYP.
MAX.
35
45
Unit
°C
P
f
= 10 mW
1.2
20
70
2.5
40
125
V
mA
mA
mW
10
1 530
−20
ITU-T
*1
1 609
+20
nm
pm
∆
½
SMSR
RIN
I
s
ext
P
f
= 10 mW, CW, 3 dB down
P
f
= 10 mW, CW
P
f
= 10 mW, 20 MHz to 3 GHz
P
f
= 10 mW, CW
P
f
= 10 mW, CW
30
20
35
1
45
2
MHz
dB
−150
dB/Hz
dB
dB
*1
Available for DWDM wavelengths based on ITU-T recommendations
(50 GHz grid, please refer to the
ORDERING INFORMATION)
*2
Polarization state of LD is aligned parallel to the slow axis.
Data Sheet PL10136EJ04V0DS
3
NX8571 Series
ELECTRO-OPTICAL CHARACTERISTICS (Applicable to Monitor PD: T
LD
= T
set
, T
C
=
−5
to +70°C)
Parameter
Monitor Current (P
f
Monitor)
Monitor Current (λ
p
Monitor)
Operation Region
*1
Symbol
I
m
(P
f
)
I
m
(λ
p
)
I
m
(λ)
λ
1
−λ
2
Conditions
P
f
= 10 mW, V
R
= 5 V
P
f
= 10 mW, V
R
= 5 V, Locking point
MIN.
20
10
25
90
0.05
TYP.
MAX.
200
100
75
Unit
µ
A
µ
A
%
pm
Discrimination Slope
Dark Current
Tracking Error
*1
η
λ
I
D
γ
*2
µ
A/pm
2
10
0.5
nA
dB
V
R
= 5 V
I
m
= const.
*1
Operation region, Discrimination slope, Slope assignment
I
m
(λ)
I
m
@100%
I
1
: I
m
@75%
I
m
(λ
p
)
I
2
: I
m
@25%
I
m
@0%
0
η
λ
=
I
1
– I
2
λ
1
–
λ
2
[
µ
A/pm]
I
m
(λ)
I
m
@100%
Operation region
Locking point
I
2
: I
m
@75%
I
m
(λ
p
)
I
1
: I
m
@25%
I
m
@0%
Operation region
Locking point
λ
1
λ
p
λ
2
Negative Slope (Odd channel)
λ
0
λ
1
λ
p
λ
2
Positive Slope (Even channel)
λ
*2
Tracking Error:
γ
P
f
(mW)
T
LD
= T
set
10
P
f
T
LD
= T
set
, T
C
= –5 to +70˚C
γ
= 10 log
P
f
10
[dB]
0
I
m
I
m
ELECTRO-OPTICAL CHARACTERISTICS
(Applicable to Thermistor and TEC: T
LD
= T
set
, T
C
=
−5
to +70°C)
Parameter
Thermistor Resistance
B Constant
Cooler Current
Cooler Voltage
Symbol
R
B
I
C
V
C
T
LD
= 25°C
T
LD
= 25°C
Conditions
MIN.
9.5
3 350
TYP.
10.0
3 450
MAX.
10.5
3 550
1.5
3.0
Unit
kΩ
K
A
V
∆
T = 70
−
T
set
, P
f
= 10 mW
∆
T = 70
−
T
set
, P
f
= 10 mW
4
Data Sheet PL10136EJ04V0DS
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
4 channel tunable
315D
single channel
303
307
311
315
330D
318
322
326
330
346D
334
338
342
346
362D
350
354
358
362
377D
366
370
373
377
393D
381
385
389
393
ITU-T Wavelength
(nm)
1 530.33
1 530.72
1 531.11
1 531.50
1 531.89
1 532.29
1 532.68
1 533.07
1 533.46
1 533.85
1 534.25
1 534.64
1 535.03
1 535.42
1 535.82
1 536.21
1 536.60
1 537.00
1 537.39
1 537.79
1 538.18
1 538.58
1 538.97
1 539.37
*1
Frequency
(THz)
195.90
195.85
195.80
195.75
195.70
195.65
195.60
195.55
195.50
195.45
195.40
195.35
195.30
195.25
195.20
195.15
195.10
195.05
195.00
194.95
194.90
194.85
194.80
194.75
Monitor Slope
Negative
Positive
Negative
Positive
Negative
Positive
Negative
Positive
Negative
Positive
Negative
Positive
Negative
Positive
Negative
Positive
Negative
Positive
Negative
Positive
Negative
Positive
Negative
Positive
*1
The value which omitted and computed the 3rd place below the decimal point
Data Sheet PL10136EJ04V0DS
5
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