6.3.4
Label
MODEL:
Po:
M . Date:
QTY:
pcs
LOT NO :
(1)
A label on the clean-
bag
QTY(PCS)
mW
CHIP LOT
TO:
TYPE
QTY
LOT No.
M.Date
C/No.
G.WT
N.WT
L
W
H
38
29
14.5
cm
cm
cm
7. Operation note
7.1 Absolute maximum ratings
If an excessively large current flows in a laser diode, a large optical output will occur and the
emitting facet may sustain damage.This optical damage can occur even with momentary over-current.
For this reason, absolute maximum ratings which must not be exceeded even momentarily have been
established. Exercise particular caution with respect to the drive voltage supply and static electricity.
We guarantee use within the absolute maximum ratings. These ratings are established for a case
temperature of 25℃. As the temperature of a laser diode increases, its maximum output will decrease
and the operating range will shrink.Even when operated within the absolute maximum ratings,
operation at high temperature will result in a shorter life than operation at low temperature. For this
reason, the design should include sufficient margin for heat radiation and light output.
7.2 Heat radiation conditions
Like other semiconductors, prolonged operation of a laser diode will cause heat to build up at
junctions and increased case temperature. For this reason, attach aluminum, copper (or other) heat
sinks (at least 30
×
30
×
3mm) to the stem of the laser.
7.3 Protection against damage due to electrostatic discharge and other current surges
Electrostatic discharge and other current surges can cause deterioration and damage in laser
diodes, resulting in reduced reliability ,We advise taking the following protective measures :
7.3.1 Ground the device and circuits. Install surge filters, surge reduction transformers, or other
electrostatic discharge protectors in the power supply inputs.
7.3.2 When working with laser diodes wear anti-static clothing, including footwear and caps. Materials
should be selected carefully. Grounded wrist should always be worn while working with laser diodes,
and the strap should be grounded through a 1 MΩresistance.
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