Full Form of LID

What is LID?

Laser Induced Damage (LID) refers to the irreversible structural or optical degradation of a material caused by exposure to high-intensity laser radiation. This phenomenon is critical in evaluating the durability and performance of optical components, such as lenses, mirrors, and coatings, used in high-power laser systems. In India, LID testing is routinely conducted by organisations like the Indian Space Research Organisation (ISRO), Defence Research and Development Organisation (DRDO), and various academic laboratories to ensure the reliability of laser-based equipment in space, defence, and industrial applications. The term is frequently encountered in research papers, engineering design reviews, and quality assurance protocols. For students preparing for GATE, IES, or other engineering entrance exams, understanding LID mechanisms and measurement standards is important, especially in fields like photonics, materials science, and electrical engineering. LID threshold—the maximum energy density a material can withstand before damage—is a key parameter in laser safety and system design. The study of LID also underpins advancements in laser processing, medical lasers, and optical communication.

LID का फुल फॉर्म

Example

The optical coating failed due to laser induced damage after repeated pulses from the high-power Nd:YAG laser at the IIT Delhi laser lab.

LID — frequently asked questions