Preliminary Data Sheet
April 1999
980-Type Ultrahigh
Reliability Pump Laser Module
Mounting Instructions
The minimum fiber-bend radius is 25 mm.
Connection
To avoid degradation in performance, mount the mod-
ule on the board as follows (see Figure 2):
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).
Mount four #2-56 screws with Fillister heads (M2-
3 mm) at the four screw hole locations (see Outline
Diagram). The Fillister head diameter must not exceed
0.140 in. (3.55 mm). Do not apply more than 2 in./lb. of
torque to the screws. To minimize package distortion, it
is recommended that a washer is used above and
beneath each mounting foot.
Pinout Information
(continued)
Table 1. Pinout Descriptions
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Chassis Ground
Chassis Ground
Photodetector Anode
Photodetector Cathode
Chassis Ground
Chassis Ground
Chassis Ground
Chassis Ground
Chassis Ground
Pump Laser Anode
Pump Laser Cathode
Chassis Ground
Chassis Ground
Chassis Ground
Electrostatic Discharge
Caution: This is a Class 0 ESD device which is
susceptible to damage as a result of
electrostatic discharge (ESD). Take
proper precautions during both handling
and testing. Follow JEDEC Publication
No. 108-A (Dec. 1998).
Handling Precautions
0.118
(3.00)
0.086
(2.18)
0.062 (1.58)
0.031 (0.79)
0.140
(3.56)
0.129 (3.28)
0.041 (1.04)
Note: Dimensions are inches and (millimeters).
1-532(F)
Lucent employs a human-body model (HBM) and the
field-induced charged-device model (CDM) 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 comparison pur-
poses. The HBM ESD threshhold presented here was
obtained using these circuit parameters:
Parameter
Charged-device Model
Human-body Model
Value
≥200
≥400
Unit
V
V
Figure 2. Fillister Head Screw
Power Sequencing
Adopt the following sequence for turn-on as a matter of
good practice to avoid the possibility of damage to the
pump laser module from power supply switching tran-
sients:
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.
Lucent Technologies Inc.
3
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