What is a Laser Diode?
A Laser Diode is a type of semiconductor diode that emits coherent light (laser light) when current flows through it.
A laser diode unlike other LEDs creates a narrow, concentrated & high-intensity beam of light which makes it highly valuable in current technology.
Components of Laser Diode
Main components of a laser diode:
• The lens focuses the output laser beam.
• Generate light energy.
• Laser chips convert electrical energy into laser light.
• Heatsink prevents overheating during operation.
• The Cap & Window protects the inside chip while allowing light to flow.
• PIN Photodiode monitors output power for stability.
• Polished surfaces act as partially reflective mirrors, amplifying light.
How it Works?
When voltage is applied between the p-type & n-type semiconductor layers, electrons & holes combine at the junction to generate photons.
Photons are magnified across reflective surfaces resulting in the emission of a strong & focused laser beam.
Applications for Laser Diodes
• Optical communication (fiber optics and internet).
• CD, DVD, and Blu-Ray players
• Barcode scanners
• Laser printers
• Medical devices and surgical tools
• Industrial cutting and engraving machines