What do you understand by LASER?

Safalta expert Published by: Saumya Sahoo Updated Sun, 18 Sep 2022 01:04 AM IST

LASER

A laser is a device that emits light through the process of light amplification based on the stimulated emission of electromagnetic radiation. The word "laser" is an acronym for "light amplification by stimulated emission radiation." Lasers differ from other light sources in that they emit coherent light. Spatial coherence allows the laser to be focused on a narrow spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows laser beams to be kept narrow over long distances (collimation), enabling applications such as laser pointers and lidars (light detection and range finding). Lasers can also exhibit high temporal coherence, allowing them to emit very narrow spectra of light. Alternatively, temporal coherence can be used to generate ultrashort light pulses with a broad spectrum but only femtosecond duration. Check here Free Current Affairs Magazine DOWNLOAD NOW  

History

Albert Einstein first described lasers in 1917. However, Theodore H. Maiman created the first laser device (see Laser in Perfection) in 1960.

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This feat was accomplished at Hughes Laboratories, where the theories of Charles Hurd Townes and Arthur Leonard Schawlow made the invention possible.

Properties of LASER

Laser radiation has very specific properties that are used in many different types of applications. It is used in the manufacture of various electronic devices such as CD-ROMs, barcode readers, etc. Laser light is exceptionally lean and coherent.  In addition, you can also check out our free General Awareness E-book- Download now for all competitive exams. 

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Briefly describe LASER.

A laser is a device that emits light through the process of light amplification based on the stimulated emission of electromagnetic radiation. The word "laser" is an acronym for "light amplification by stimulated emission radiation." Lasers differ from other light sources in that they emit coherent light. Spatial coherence allows the laser to be focused on a narrow spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows laser beams to be kept narrow over long distances (collimation), enabling applications such as laser pointers and lidars (light detection and range finding). Lasers can also exhibit high temporal coherence, allowing them to emit very narrow spectra of light. Alternatively, temporal coherence can be used to generate ultrashort light pulses with a broad spectrum but only femtosecond duration.

Describe the brief history of LASER.

Albert Einstein first described lasers in 1917. However, Theodore H. Maiman created the first laser device (see Laser in Perfection) in 1960. This feat was accomplished at Hughes Laboratories, where the theories of Charles Hurd Townes and Arthur Leonard Schawlow made the invention possible.

What are the properties of LASER?

Properties of LASER

Laser radiation has very specific properties that are used in many different types of applications. It is used in the manufacture of various electronic devices such as CD-ROMs, barcode readers, etc. Laser light is exceptionally lean and coherent.

What are the applications of LASER?

Applications of LASER

  • It is used with CD and DVD ROMs.

  • In barcode scanners.

  • As an integral part of fusion reactors.

  • In various types of devices like cutting, drilling, surface treatment, soldering, and welding.

  • In medical devices like dental and cosmetic equipment.

  • In laser printers.

  • Used in military equipment. Missile defense equipment

What are the advantages and disadvantages of LASER?

Procs and cons of LASER

Advantages of lasers It is used to convey information in the field of communication due to their tremendous capacity to support information. This principle of electromagnetic interference is used in wireless communication systems over free space in both telecommunications and computer networks, as laser radiation is immune to these interferences. Laser emissions contain almost no signal leakage. Laser-based optical fibers are used in fiber optic systems because they are very light. Lasers are widely used in the medical field for cancer diagnosis because they are less harmful than X-rays. They are used to burn small tumors on the surface of the eye and tissues.

Disadvantages of lasers because lasers are expensive, and patients who require laser-based treatment options are very expensive. Lasers are expensive to maintain, resulting in high costs to doctors and hospital administrators. The laser increases the folding and treatment time based on the laser equipment.

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