Laser Drivers

The function of a laser driver is to deliver the exact amount of current set, and at whatever voltage is needed, to the laser diode in a circuit. As a result, they protect the laser diode from damage. 

Laser driver applications

Laser drivers are used in a variety of applications, from diagnostic and analytical equipment in the medical field to welding.

Why does a diode need a laser current driver?

An often overlooked factor in using laser diodes in circuits is the influence of temperature on the output power and operating current. 

While the threshold current rises as the temperature increases, the optical output power and differential efficiency decrease. The driver circuit therefore needs a safety feature that ensures that a significant temperature increase will not destroy the laser – a laser driver fulfils this need.

Laser drivers provide closed-loop control of the average optical power of a continuous wave (CW) laser diode. The control loop adjusts the laser to maintain a constant current and power. This ensures a regular temperature and so protects the laser from heat damage. 

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Omschrijving Prijs Diode Types Driven Laser Type Driven Maximum Laser Diode Current Maximum Output Current Dimensions Package Type Number of Pins Length Maximum Supply Voltage Minimum Supply Voltage Width Power Dissipation Series Supply Voltage Range
RS-stocknr. 877-9114
FabrikantAnalog Devices
26,87 €
Aantal stuks
N Type Closed Loop 100mA 80mA 7.1 x 7.1 x 0.95mm - - 7.1mm 5.5V 4.5V 7.1mm - ADN28 4.5 → 5.5 V
RS-stocknr. 158-1975
FabrikantAnalog Devices
20,031 €
Each (In a Tray of 490)
Aantal stuks
- - - - 5 x 5mm LFCSP EP 32 5mm - - 5mm - - -
RS-stocknr. 709-0101
FabrikantAnalog Devices
21,72 €
Aantal stuks
- - - - 5 x 5mm - 32 5mm - - 5mm - - -