Data Sheet

3

Tolerances ± 0.25 mm

Finish: Gold plate

Pin 1 and Pin 2 Thermistor

The thermistor is used in a control loop in conjunction

with the thermo-electric cooler to maintain the laser

submount temperature at the required value. Operating

current should be less than 100 µA to prevent

selfheating errors.

Pin 3 Laser modulation (-) and bias

The data input (modulation) and bias are both applied

via this pin which has a nominal 25 Ohm

load impedance.

Pin 4 Monitor anode, Pin 5 Monitor cathode

The back facet monitor diode provides a mean power

reference for the laser and is normally operated with a

5 V reverse bias.

Pin 6 TEC (+), Pin 7 TEC (-)

Applying a positive voltage on pin 6 with respect to pin 7

will cause the internal submount to be cooled relative to

the case temperature.

Reversing the polarity will raise the submount

temperature relative to the case. Care should be taken to

avoid overheating the submount when driving the TEC in

this manner.

The TEC supply should be capable of delivering up to

1.2 A at 2.5 V.

Pin 8, 9, 11, 13 Case ground.

These pins must be grounded in all applications.

Pin 10, 14 N/C

These pins are not connected. They should be grounded

if possible.

Pin 12 Laser (+)

This pin provides the return path for the laser modulation

and bias circuits.

Package Outline Drawing and Dimensions

Instructions for Use

Figure 3: Dimensions diagram.