A Study on the Saser

Abstract

A sound amplification by stimulated emission of radiation (SASER) is a device that produces acoustic radiation.[22] It concentrates sound waves for use as quick and accurate information carriers in a number of applications, just like laser light does. Acoustic radiation, or sound waves, can be produced via the stimulated emission of phonons, which is the basis for the sound amplification process.Since sound or lattice vibration may be described by a phonon, just like light can be conceived of as photons, one could argue that SASER is the acoustic equivalent of the laser. In a SASER device, sound waves which are lattice vibrations, phonons travel through an active medium after being generated by a source such as an electric field functioning as a pump.[22]

Introduction

The text presents a detailed overview of lasers, their history, working principles, characteristics, and related technologies such as masers and SASERs. A laser is a device that emits coherent light through stimulated emission, a concept rooted in quantum physics and first realized practically in 1960 by Theodore Maiman. Lasers are distinguished from ordinary light sources by their high coherence, narrow wavelength range, and strong directionality, enabling precise focusing and long-distance propagation.

Historically, the laser evolved from the maser, developed in the 1950s by Charles Townes, Basov, and Prokhorov, who later received the Nobel Prize. The transition from microwave masers to optical lasers led to intense scientific progress, legal disputes over invention credit, and rapid technological adoption. Early laser types included ruby lasers, gas lasers (He–Ne), and semiconductor lasers, which paved the way for widespread commercial and scientific use.

The principle of laser operation relies on population inversion and stimulated emission within a gain medium, supported by an optical resonator made of mirrors. Three-level and four-level laser systems are discussed, with four-level lasers enabling continuous operation. Laser beams are characterized by monochromaticity, coherence, collimation, and high power, available in both continuous-wave and pulsed forms, with pulsed lasers capable of producing extremely high peak powers and ultrashort femtosecond pulses.

Lasers have become indispensable across fields such as manufacturing, medicine, communication, electronics, defense, space exploration, and scientific research, including holography, barcode scanning, eye surgery, fiber-optic communication, and atomic cooling.

The text also introduces SASERs (Sound Amplification by Stimulated Emission of Radiation), which are the acoustic counterparts of lasers. SASERs amplify coherent sound waves (phonons) instead of light and were first demonstrated in 2009. They hold potential for applications in optoelectronics, high-frequency signal processing, precision measurement, and next-generation computing.

Overall, the document highlights how lasers and laser-like devices have evolved from theoretical concepts into powerful tools that underpin modern science and technology.

Conclusion

A device that emits acoustic radiation is called a sound amplification by stimulated emission of radiation (SASER).[1] Like laser light, it concentrates sound waves for use as fast and precise information carriers in various applications. The process of sound amplification is based on the stimulated emission of phonons, which can produce acoustic radiation, or sound waves.One may argue that SASER is the acoustic counterpart of the laser since sound or lattice vibration can be characterized by a phonon, much as light can be thought of as photons. Sound waves (lattice vibrations, phonons) are produced by an electric field acting as a pump and then move through an active medium in a SASER device.[22]

References

[1] Taylor, Nick (2000). Laser: The Inventor, The Nobel Laureate, and The Thirty-Year Patent War. Simon & Schuster. p. 66. ISBN 978-0684835150. [2] Ross T., Adam; Becker G., Daniel (2001). Proceedings of Laser Surgery: Advanced Characterization, Therapeutics, and Systems. SPIE. p. 396. ISBN 978-0-8194-3922-2. [3] \"December 1958: Invention of the Laser\". aps.org. Archived from the original on December 10, 2021. Retrieved January 27, 2022 [4] Semiconductor Sources: Laser plus phosphor emits white light without droop\". November 7, 2013. Archived from the original on June 13, 2016. Retrieved February 4, 2019. [5] Laser Lighting: White-light lasers challenge LEDs in directional lighting applications\". February 22, 2017. Archived from the original on February 7, 2019. Retrieved February 4, 2019. [6] How Laser-powered Headlights Work\". November 7, 2011. Archived from the original on November 16, 2011. Retrieved February 4, 2019. [7] Laser light for headlights: Latest trend in car lighting | OSRAM Automotive\". Archived from the original on February 7, 2019. Retrieved February 4, 2019. [8] Heilbron, John L. (March 27, 2003). The Oxford Companion to the History of Modern Science. Oxford University Press. pp. 447. ISBN 978-0-19-974376-6. [9] Bertolotti, Mario (October 1, 2004). The History of the Laser. CRC Press. pp. 215, 218–219. ISBN 978-1-4200-3340-3. [10] McAulay, Alastair D. (May 31, 2011). Military Laser Technology for Defense: Technology for Revolutionizing 21st Century Warfare. John Wiley & Sons. p. 127. ISBN 978-0-470-25560-5. [11] Renk, Karl F. (February 9, 2012). Basics of Laser Physics: For Students of Science and Engineering. Springer Science & Business Media. p. 4. ISBN 978-3-642-23565-8. [12] LASE\". Collins Dictionary. Retrieved January 6, 2024. [13] \"LASING\". Collins Dictionary. Retrieved January 6, 2024. [14] Strelnitski, Vladimir (1997). \"Masers, Lasers and the Interstellar Medium\". Astrophysics and Space Science. 252: 279–287. Bibcode:1997Ap&SS.252..279S. doi:10.1023/ [15] Chu, Steven; Townes, Charles (2003). \"Arthur Schawlow\". In Edward P. Lazear (ed.). Biographical Memoirs. Vol. 83. National Academy of Sciences. p. 202. ISBN 978-0-309-08699-8 [16] Al-Amri, Mohammad D.; El-Gomati, Mohamed; Zubairy, M. Suhail (December 12, 2016). Optics in Our Time. Springer. p. 76. ISBN 978-3-319-31903-2. [17] Hecht, Jeff (December 27, 2018). Understanding Lasers: An Entry-Level Guide. John Wiley & Sons. p. 201. ISBN 978-1-119-31064-8. [18] https://www.ulsinc.com/learn [19] https://www.fiberoptics4sale.com/blogs/wave-optics/semiconductor-laser-physics [20] https://www.szlaser.com/index.php/wiki/laser-physics/ [21] https://www.britannica.com/technology/laser [22] Watson, Andrew (27 March 1999). \"Pump up the volume\". New Scientist: 36–41. Retrieved 2016-02-19. What lasers do for light, sasers promise to do for sound. [23] Phil Schewe; Ben Stein. \"A New Kind of Acoustic Laser\". Physics News Update. American Institute of Physics (AIP). Archived from the original on June 25, 2006. Retrieved September 29, 2006. [24] Dario Borghino (June 23, 2009). \"Sound laser could be the key to manipulating nanoparticles\". Retrieved 30 Jan 2013. [25] Maiman, T. H. (1960). \"Stimulated Optical Radiation in Ruby\". Nature. 187 (4736). Springer Science and Business Media LLC: 493–494. Bibcode:1960Natur.187..493M [26] Wallentowitz, S.; Vogel, W.; Siemers, I.; Toschek, P. E. (1996-07-01). \"Vibrational amplification by stimulated emission of radiation\". Physical Review A. 54 (1). American Physical Society (APS): 943–946. Bibcode:1996PhRvA..54..943W. doi:10.1103/physreva.54.943. ISSN 1050-2947. PMID 9913552. [27] Camps, I.; Makler, S. S.; Pastawski, H. M.; Foa Torres, L. E. F. (2001-09-10). \"GaAs?AlxGa1?xAs double-barrier heterostructure phonon laser: A full quantum treatment\". Physical Review B. 64 (12) 125311. arXiv:cond-mat/0101043. Bibcode:2001PhRvB..64l5311C. doi:10.1103/physrevb.64.125311. ISSN 0163-1829

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Copyright © 2025 Muhammad Arif Bin Jalil. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.