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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Description Price 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 Stock No. 697-3535
Mfr. Part No.Laser Driver N Type
kr 246,35
N Type CW 60mA 2.5mA 6.5 x 20mm - - 6.5mm 6V dc 2.4V dc 20mm - - 2.4 → 6 V dc
RS Stock No. 697-3541
Mfr. Part No.Eval Laser Driver Kit
kr 1 338,05
N Type CW 100mA - - - - - 5.5V dc 3.5V dc - - - 3.5 → 5.5 V dc
RS Stock No. 191-4721
Mfr. Part No.MAX3738ETG+
kr 31,092
Each (In a Pack of 5)
- SFF, SFP - - 4.1 x 4.1 x 0.8mm QFN 24 4.1mm +6V -0.5V 4.1mm 2222mW - -0.5 → +6 V
RS Stock No. 877-9114
Mfr. Part No.ADN2841ACPZ-48
kr 285,48
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 Stock No. 189-8876
Mfr. Part No.MAX3736ETE+
kr 93,71
- SFP 22 (Typ.)mA - 3 x 3 x 0.75mm QFN 16 3mm +6V -0.5V 3mm 2W - -0.5 → +6 V
RS Stock No. 191-4278
Mfr. Part No.MAX3738ETG+
kr 24,562
Each (In a Tube of 75)
- SFF, SFP - - 4.1 x 4.1 x 0.8mm QFN 24 4.1mm +6V -0.5V 4.1mm 2222mW - -0.5 → +6 V