3

Operation notes

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_C. 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.

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.

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 :

1)Ground the device and circuits. Install surge filters, surge reduction transformers, or other electrostatic discharge

protectors in the power supply inputs.

carefully.’ Grounded wrist should always be worn while working with laser diodes, and the strap should be grounded through

a 1 M

Ω resistance.

circuits to avoid the generation of excessive current spikes.

fluorescent lamps or other sources of EMI emissions.

4. Soldering

Use a grounded soldering iron to solder laser leads. Solder at a temperature of no more than 250_C for a maximum of 3

seconds, at a point at least 2 mm from the base of the leads.

5.Handling laser diodes

Never touch the glass window of the laser. A damaged or dirtied window will impair the performance of the laser.

6. Handling packages

Due to the glass window in each device, packages must not be dropped or subjected to excessive pressure.

7. Safety

It is extremely dangerous to look, either directly or through a lens, at the laser beam emitted from a laser diode. Use a TV

camera or other similar device to adjust the optical axis.

CVC INTERNATIONAL LLC