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| Name | LASER COMPLETE Engineering Physics_AKTU, LPU, SPPU |
| Video Uploader | Video From RGSClasses Engineering Essential |
| Upload Date | This Video Uploaded At 02-03-2022 10:33:59 |
| Video Discription | Important play list related with btech coures are as follows (2023-2024) batch https://www.youtube.com/playlist?list=PLTYLC3XcJGZ5D3ohTYfOIR39L-H69f9Ca engineering physics https://www.youtube.com/playlist?list=PLTYLC3XcJGZ6HDxcewLBqn3WUDEzs5cDZ electrical engineering https://www.youtube.com/playlist?list=PLTYLC3XcJGZ6HDxcewLBqn3WUDEzs5cDZ engineering mathematics https://www.youtube.com/playlist?list=PLTYLC3XcJGZ4mRfHuX1zMhd4cU_89ecTY physics other indian universities ** GET the free pdf notes via link https://drive.google.com/file/d/1vwoQDYwKCqhVqGtpnWPriSbiYYCfgdS7/view?usp=sharing download OUR app RGS classes on playstore via link and visit course https://iygmp.on-app.in/app/oc/332578/iygmp #rgsphysics #engineeringphysics JOIN telegram https://t.me/rgsclassesofficial in b tech first year physics /engineering physics/applied physics the optical fiber and the laser is last unit /module. this is the first part of the series. A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word "laser" is an acronym for "light amplification by stimulated emission of radiation". The first laser was built in 1960 by Theodore H. Maiman at Hughes Research Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light which is coherent. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows a laser beam to stay narrow over great distances (collimation), enabling applications such as laser pointers and lidar. Lasers can also have high temporal coherence, which allows them to emit light with a very narrow spectrum. Alternatively, temporal coherence can be used to produce ultrashort pulses of light with a broad spectrum but durations as short as a femtosecond. Lasers are used in optical disc drives, laser printers, barcode scanners, DNA sequencing instruments, fiber-optic, semiconducting chip manufacturing (photolithography), and free-space optical communication, laser surgery and skin treatments, cutting and welding materials, military and law enforcement devices for marking targets and measuring range and speed, and in laser lighting displays for entertainment. Semiconductor lasers in the blue to near-UV have also been used in place of light-emitting diodes (LED's) to excite fluorescence as a white light source. This permits a much smaller emitting area due to the much greater radiance of a laser and avoids the droop suffered by LED's; such devices are already used in some car headlamps |
| Category | Education |
| Tags | laser | laser physics | laser action | laser emission | ruby laser | he ne laser construction and working | aktu laser | btech physics laser | laser engineering physics in hindi | laser engineering physics | applied physics laser | betch physics hindi | last unit btech physics | spontaneous emission and stimulated emission | population inversion in laser | three level laser system | four level laser system in hindi | photon |
