When wiring a laser diode array, the key considerations are current regulation, thermal management, and pulse control. Each diode in the array must receive a controlled current to prevent damage, as laser diodes are highly sensitive to overcurrent and voltage spikes . Arrays can be wired in parallel or series-parallel configurations, depending on the voltage and current requirements. Parallel wiring requires individual current-limiting resistors or active current sources for each diode to ensure uniform output .
For high-speed pulsed operation, such as in LiDAR applications, the driver circuit typically includes:
Laser diode arrays generate significant heat, especially at high repetition rates. Proper heat sinks, thermal pads, and airflow are essential to maintain diode longevity . Additionally, wiring should minimize parasitic inductance and resistance to prevent voltage overshoot, which can damage the diodes . Safety precautions, including eye protection and current-limiting safeguards, are critical when working with high-power laser arrays .
In this article, we will show how to connect and build a simple laser diode circuit to get light output from a laser diode.
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