Multi-channel laser diode driver selection guide

To select a multiple-channel laser diode driver you need to consider:

• The maximum intended operating current for the laser diode, keeping in mind possible degradation due to aging of the laser.
• The maximum voltage drop, which is the sum of the diode operating voltage and the ohmic loss in the cables and connectors.

Our laser diode controllers are current sources. You command a specific current, and the voltage that results is a characteristic of the load (the diode plus cables and connectors) rather than the driver. The driver shuts off to protect itself when the output voltage drawn exceeds its capabilities. The limit at which this occurs is termed the compliance voltage.

There are two models in our multi-controller product line. The current or power of each laser can be individually set, but all channels have the same maximum current and voltage capability.