This article examines the key advantages of laser diodes over LEDs, lamps, and other light sources. It explains how their high radiance, electrical efficiency, narrow spectral output, compact size, and high-speed modulation make laser diodes the preferred choice for applications in industrial photonics, biomedical instrumentation, spectroscopy, optical communications, sensing, and imaging. It also provides guidance on selecting the right laser diode based on wavelength, output power, and application requirements.
