Data Sheet
January 1999
D371-Type Digital Uncooled DFB
Laser Module
Applications
s
s
s
Long-reach SONET OC-3/OC-12 systems
Telecommunications
Secure digital data systems
Benefits
s
s
s
s
Easily board mounted
Requires no lead bending
No additional heat sinks required
Pin compatible with industry-standard, 14-pin laser
module
Highly efficient DFB-MQW laser structure allows
for lower threshold and drive currents, and reduced
power consumption
The low-profile D371-Type Laser Module is ideally suited for
short- and long-haul SONET and other high-speed digital
applications.
s
Features
s
s
Eight-pin package suitable for SONET applications
Narrow linewidth, distributed-feedback, multiquan-
tum-well (DFB-MQW)1.3
µ
m laser with single-
mode fiber pigtail
Wide operating temperature range:
–40
°
C to +85
°
C
No TEC required
High output power: typical 2.0 mW peak power
coupled into single-mode fiber
Hermetically sealed active components
Internal back-facet monitor
Qualification program:
Telcordia Technologies
*
TA-983
Description
The D371-Type Uncooled Laser Module consists of a
laser diode coupled to a single-mode fiber pigtail.
The device is available in a standard, 8-pin config-
uration (see Figure 1 and/or Table 1) and is ideal for
long-reach (SONET) and other high-speed digital
applications.
The laser diode is a narrow linewidth (<1 nm) DFB-
MQW single-mode laser and an InGaAs PIN photo-
diode back-facet monitor in an epoxy-free, hermeti-
cally sealed package.
s
s
s
s
s
s
*
Telcordia Technologies
is a registered trademark of Telcordia
Technologies, Inc.
D371-Type Digital Uncooled DFB Laser Module
Data Sheet
January 1999
Description
(continued)
The device characteristics listed in this document are
met at 2.0 mW output power. Higher- or lower-power
operation is possible. Under conditions of a fixed pho-
todiode current, the change in optical output is typically
±
0.5 dB over an operating temperature range of –40
°
C
to +85
°
C.
This device incorporates the new Laser 2000 manufac-
turing process developed by the Optoelectronic unit of
Agere Systems Inc. Laser 2000 is a low-cost platform
that targets high-volume manufacturing and tighter
product distributions on all optical subassemblies. The
platform incorporates an advanced optical design that
is produced on a highly automated production line. The
Laser 2000 platform is qualified for the central office
and uncontrolled environments, and can be used for
applications requiring high performance and low cost.
4
3
2
1
Table 1. Pin Descriptions
Pin Number
1
2
3
4
5
6
7
8
Connection
NC/reserved
Case ground
NC/reserved
Photodiode cathode
Photodiode anode
Laser diode cathode
Laser diode anode
NC/reserved
5
6
7
8
1-900 (C)
Figure 1. D371-Type Digital Uncooled DFB Laser Module Schematic, Top View
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
Parameter
Maximum Peak Laser Drive Current or
Maximum Fiber Power*
Peak Reverse Laser Voltage:
Laser
Monitor
Monitor Forward Current
Operating Case Temperature Range
Storage Case Temperature Range
Lead Soldering Temperature/Time
Relative Humidity (noncondensing)
* Rating varies with temperature.
Symbol
I
OP
P
MAX
V
RL
V
RD
I
FD
T
C
T
stg
—
RH
Min
—
—
—
—
—
–40
–40
—
—
Max
150
10
2
20
2
85
85
260/10
85
Unit
mA
mW
V
V
mA
°
C
°
C
°
C/s
%
2
Agere Systems Inc.
Data Sheet
January 1999
D371-Type Digital Uncooled DFB Laser Module
Handling Precautions
Caution: This device is susceptible to damage as a result of electrostatic discharge (ESD). Take proper pre-
cautions during both handling and testing. Follow guidelines such as JEDEC Publication No. 108-
A (Dec. 1988).
Although protection circuitry is designed into the device, take proper precautions to avoid exposure to ESD.
Electro/Optical Characteristics
Table 2. Electro/Optical Characteristics
(over operating temperature range unless otherwise noted)
Parameter
Operating Temperature
Range
Optical Output Power*
Threshold Current
Modulation Current
Slope Efficiency
†
Center Wavelength
Spectral Width (–20 dB)
Side-mode Suppression
Ratio
Tracking Error
Spontaneous Emission
Rise/Fall Times
Forward Voltage
Input Impedance
Monitor Current
Monitor Dark Current
Wavelength Tempera-
ture Coefficient
Symbol
T
P
F
I
TH
I
MOD
SE
λ
C
∆λ
SMSR
TE
P
TH
t
R
, t
F
V
F
R
I
MON
I
D
—
Test Conditions
—
CW, nominal
T = 25
°
C
T = full range
CW, P
F
= 2.0 mW, T = 25
°
C
CW, I
MON
= const. T = full range
CW, P
F
= 2.0 mW, T = 25
°
C
P
F
= 2.0 mW, CW
P
F
= 2.0 mW, 622 Mbits/s
CW, P
F
= 2.0 mW
I
MON
= constant, CW
I = (0.9) I
TH
10%—90% pulse
T = 25
°
C
CW
—
V
R‡
= 5 V
V
R‡
= 5 V
—
Min
–40
—
4
2
10
7.5
67
1280
—
30
—
—
—
—
3
50
—
—
Typ
—
2
11
—
20
—
—
—
—
40
0.5
—
0.25
1.1
—
—
10
0.09
Max
85
—
15
50
30
55
200
1335
1
—
—
50
0.5
1.6
8
1000
200
0.1
Unit
°
C
mW
mA
mA
mA
µ
W/mA
nm
nm
dB
dB
µ
W
ns
V
Ω
µ
A
nA
nm/
°
C
* 1 mW power option also available. See Table 4 for more information.
† The slope efficiency is used to calculate the modulation current for a desired output power. This modulation current plus the threshold current
comprise the total operating current for the device.
‡ V
R
= reverse voltage.
Agere Systems Inc.
3
D371-Type Digital Uncooled DFB Laser Module
Data Sheet
January 1999
Outline Diagram
Dimensions are in inches and (millimeters).
TRADEMARK, CODE, LASER SERIAL NUMBER,
AND/OR DATE CODE IN APPROXIMATE AREA SHOWN
4
3
2
1
5
6
7
8
1.06 (27.0)
MIN
0.52 (13.2)
39.37 (1000) MIN
PIGTAIL LENGTH
0.045 (1.143)
0.20 (5.00)
0.010
(0.254)
0.29
(7.37)
0.165 (4.20)
0.016 (0.410)
0.100 (2.54)
0.300
(7.62)
0.110 (2.79)
0.085
(2.16)
0.17
(4.32)
0.30
(7.62)
1-899 (C).f
1
4
Agere Systems Inc.
Data Sheet
January 1999
D371-Type Digital Uncooled DFB Laser Module
Qualification Information
The D371-Type Laser Module has completed and passed the following qualification tests and meets the intent of
Bellcore TR-NWT-000468 for interoffice environments and TA-TSY-000983 for outside plant environments.
Table 3. D371-Type Laser Module Qualification Test Plan
Qualification Test
Mechanical Shock
Vibration
Solderability
Thermal Shock
Fiber Pull
Accelerated (Biased) Aging
Conditions
500 G for P/F
1,500 G for information
20 g, 20 Hz—2,000 Hz
—
Delta T = 100
°
C
1 kg; 3 times for P/F
2 kg; 3 times for information
85
°
C, 5,000 hrs.
Sample Size
11
11
11
11
11
25
Reference
MIL-STD-883
Method 2002
MIL-STD-883
Method 2007
MIL-STD-883
Method 2007
MIL-STD-883
Method 2003
Telcordia Technologies
983
Telcordia Technologies
983
Section 5.18
Telcordia Technologies
983
Telcordia Technologies
983
Section 5.20
Telcordia Technologies
983
Section 5.23
MIL-STD-202
Method 103
MIL-STD-883
Method 1018
TR357
Sec. 4.4.2.5
85
°
C Storage
1,000 hrs. for provisional qual.
2,000 hrs. for P/F
5,000 hrs. for information
500 cycles for P/F
1,000 cycles for information
10 cycles for P/F
20 cycles for information
40
°
C, 95% RH
1,000 hrs. for provisional qual.
1,344 hrs. for P/F
<5,000 ppm water vapor
—
—
11
Temperature Cycling
11
Cyclic Moisture Resistance
11
Damp Heat
11
Internal Moisture
Flammability
ESD Threshold
11
—
6
Telcordia Technologies
983
Section 5.22
Agere Systems Inc.
5
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