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庫存編號 697-3541
製造零件編號Eval Laser Driver Kit
N Type CW 100mA - - - - - 5.5V dc 3.5V dc - - - 3.5 → 5.5 V dc
RS庫存編號 189-8876
- SFP 22 (Typ.)mA - 3 x 3 x 0.75mm QFN 16 3mm +6V -0.5V 3mm 2W - -0.5 → +6 V
RS庫存編號 191-4721
/個 (每包:5個)
- 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庫存編號 697-3535
製造零件編號Laser Driver N Type
N Type CW 60mA 2.5mA 6.5 x 20mm - - 6.5mm 6V dc 2.4V dc 20mm - - 2.4 → 6 V dc
RS庫存編號 191-4278
毎管:75 個
- 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庫存編號 877-9114
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