Performance Characteristics Of Laser Diodes

The working principle of laser diodes is based on the stimulated radiation effect of semiconductor materials. In semiconductor materials, when electrons transition from high to low energy levels, they release energy in the form of photons. Laser diodes, through specific structural design and doping processes, repeatedly amplify and enhance these photons inside the semiconductor, ultimately forming a high brightness and high coherence laser beam.
Laser diodes have many unique performance characteristics compared to other types of lasers:
High conversion efficiency: Laser diodes can efficiently convert electrical energy into laser energy, with a conversion efficiency typically above 50%, much higher than other types of lasers.
Small size and light weight: Laser diodes have a compact structure, small size, and light weight, making them very suitable for use on portable and mobile application devices.
Long lifespan: The average lifespan of laser diodes exceeds 10000 hours, and the lifespan of some high-end products can even exceed 20000 hours.
Fast modulation speed: Laser diodes support fast modulation speed and can adjust light intensity within nanoseconds or even sub nanoseconds.
Good monochromaticity and strong coherence: The laser output from the laser diode has excellent monochromaticity and coherence, making it very suitable for applications that require high precision and stability.