Wavelength-Selected, High-Power D2587P-Type (with Wavelength
Locker)/D2547P-Type Isolated DFB Laser Modules
Data Sheet, Rev. 2
July 2001
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
Laser Reverse Voltage
Symbol
Min
Max
Unit
VRLMAX
IFLMAX
TC
—
—
2
225
70
70
10
2
V
mA
°C
°C
V
dc Forward Current
Operating Case Temperature Range
Storage Case Temperature Range*
Photodiode Reverse Voltage
Photodiode Forward Current
–25
–40
—
Tstg
VRPDMAX
IFPDMAX
—
mA
* Does not apply to shipping container.
Mounting Instructions
Handling Precautions
The minimum fiber bend radius is 1.0 in. (25.4 mm)
Power Sequencing
To avoid degradation in performance, mount the mod-
ule on the board as follows:
To avoid the possibility of damage to the laser module
from power supply switching transients, follow this
turn-on sequence:
1. Place the bottom flange of the module on a flat heat
sink at least 0.5 in. x 1.180 in. (12.7 mm x 30 mm) in
size. The surface finish of the heat sink should be
better than 32 µin. (0.8 µm), and the surface flatness
must be better than 0.001 in. (25.4 µm). Using ther-
mal conductive grease is optional; however, thermal
performance can be improved by up to 5% if conduc-
tive grease is applied between the bottom flange and
the heat sink.
1. All ground connections
2. Most negative supply
3. Most positive supply
4. All remaining connections
Reverse the order for the proper turn-off sequence.
2. Mount four #2-56 screws with Fillister heads
(M2-3 mm) at the four screw hole locations (see Out-
line Diagram). The Fillister head diameter must not
exceed 0.140 in. (3.55 mm). Do not apply more than
1 in.-lb. of torque to the screws.
Electrostatic Discharge
CAUTION: This device is susceptible to damage as
a result of electrostatic discharge. Take
proper precautions during both han-
dling and testing. Follow guidelines
such as JEDEC Publication No. 108-A
(Dec. 1988).
0.118
(3.00)
0.062 (1.58)
0.086
(2.18)
0.031 (0.79)
Agere Systems employs a human-body model (HBM)
for ESD-susceptibility testing and protection-design
evaluation. ESD voltage thresholds are dependent on
the critical parameters used to define the model. A
standard HBM (resistance = 1.5 kΩ, capacitance = 100
pF) is widely used and, therefore, can be used for com-
parison purposes. The HBM ESD threshold presented
here was obtained using these circuit parameters:
0.140
(3.56)
0.129 (3.28) R
0.041 (1.04)
1-532(C)
Note: Dimensions are in inches and (millimeters).
Parameter
Value
Unit
Figure 4. Fillister Head Screw
Human-body Model
>400
V
4
Agere Systems Inc.
AGERE [ AGERE SYSTEMS ]
