Definition, Types, Principle Working, Construction, Characteristics, Advantages, Disadvantages, Application
Subject and UNIT: Engineering Physics: Unit III: c. Lasers
Laser light can also be produced in semiconductors. The most compact of all lasers is semiconductor diode laser. It is also called injection laser. 1. Homojunction semiconductor diode lasers 2. Heterojunction semiconductor diode lasers.
Working Principle, Construction, Characteristics, Advantages, Disadvantages, Applications
Subject and UNIT: Engineering Physics: Unit III: c. Lasers
The first molecular CO2, gas laser was developed by Indian born American Scientist Prof. C.K.N. Patel.
Working Principle, Construction, Characteristics, Advantages, Disadvantages, Applications
Subject and UNIT: Engineering Physics: Unit III: c. Lasers
Nd - YAG laser is Neodymium based laser.
Subject and UNIT: Engineering Physics: Unit III: c. Lasers
Laser is basically a light source. Laser light has the following important characteristics (i) High directionality (ii) High intensity (iii) Highly monochromatic (iv) Highly coherent
Lasers | Engineering Physics
Subject and UNIT: Engineering Physics: Unit III: c. Lasers
It is a situation in which the number of atoms in higher energy state is more than that in lower energy state.
Lasers
Subject and UNIT: Engineering Physics: Unit III: c. Lasers
Consider an assembly of atoms with different energy states at an absolute temperature T.
Theory of Laser
Subject and UNIT: Engineering Physics: Unit III: c. Lasers
Such emission of light radiation which is not triggered by any external influence is called spontaneous emission.
Subject and UNIT: Engineering Physics: Unit III: c. Lasers
Consider an assembly of atoms in a material which is exposed to light radiation (a stream of photons with energy hv).
Introduction
Subject and UNIT: Engineering Physics: Unit III: c. Lasers
LASER stands for Light Amplification by Stimulated Emission of Radiation.
Optics | Engineering Physics
Subject and UNIT: Engineering Physics: Unit III: b. Optics
Assignment Problem: Engineering Physics: Optics
Optics | Engineering Physics
Subject and UNIT: Engineering Physics: Unit III: b. Optics
‘16’ Marks Anna University Questions: Engineering Physics: Optics
Optics | Engineering Physics
Subject and UNIT: Engineering Physics: Unit III: b. Optics
‘2’ Marks Question with Answers: Engineering Physics: Optics