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Baruah, G. D.
- Lasing without Inversion in Three Level Atoms and Atomic Coherence Effects
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PDF Views:378
Authors
Affiliations
1 Department of Physics, J.B. College, Jorhat-785001, Assam, IN
2 Centre for Laser and Optical Science, New Uchamati, Doom Dooma-786151, Assam, IN
3 Department of Physics, D.H.S.K. College, Dibrugarh-786001, Assam, IN
1 Department of Physics, J.B. College, Jorhat-785001, Assam, IN
2 Centre for Laser and Optical Science, New Uchamati, Doom Dooma-786151, Assam, IN
3 Department of Physics, D.H.S.K. College, Dibrugarh-786001, Assam, IN
Source
Indian Journal of Energy, Vol 1, No 1 (2012), Pagination: 1-8Abstract
We reviewed briefly about the concepts and physics behind lasing without inversion and atomic coherence effect. The discussion concentrates on the analysis of physical conditions under which a ∧-type three level system exhibits lasing without inversion. At the end of this review, a possible application of LWI was reported.Keywords
LWI, Atomic Coherence EffectFull Text
References
- Agarwal GS (1991), Inhibition of Spontaneous Emission Noise in Laser without Invasion, Phys. Rev. A 44, R 28-33.
- Alzetta G, Gozzini A, Moi L and Orriols G (1976), Experimental-Method for Observation of Rf Transitions and Laser Beat Resonances in Oriented Na Vapor, Nuovo Cimento. 36, 5-20.
- Arimondo B, Orriols G and Novo Cimento (1976), Non-absorbing atomic coherence by coherent two photon transitions in a three-level optical pumping, Phys. Rev. Lett. 7, 333-338.
- Basov NG and Prokhorov AM (1955), Possible methods for obtaining active molecules for a molecular oscillator Soviet Phys. JETP. 1, 184-189.
- Bloembergen M (1956), Theory of Maser, Phys. Rev. 104, 324-329.
- Boller KJ, Imamoglu A and Harris SE (1991), Observations of Electro Magnetically induced Transparency, Phys. Rev. Lett. 66, 2593-2596.
- Cohen-Tannoudji C (1977), Quantum mechanics. Vol.1, John Wiley & Sons.
- Einstein A, Quantum Theory of Radiation, Z Physik. 18, 121-126 (1917).
- Field JE, Hann KH and Harris SE (1991), Observation of electromagnetic Transparency in Collisionally Broadened Lead Vapors. Phys. Rev. Lett, 67, 3062-3065.
- Fry ES, Li X, Nikonov D, Padmabandu GG, Scully MO, Smith AV, Tittle PK, Wang C, Wilkinson SR and Zhu SY (1993), Atomic Coherence Effect within Sodium D1 line – Lasing without Inversion via Radiation Trapping. Phys. Rev. Lett. 70, 3235-3238.
- Hai-Woong Lee (1995), Quantum Theory of Electromagnetically induced suppression of absorption and inversionless Lasing in a three-level system. J. Opt. Soc. Am. B12, 449-455.
- Hanle W (1924), Atomic Coherence Effect. Z. Phys. 30, 93-99.
- Harris SE, Field JE and Kasapi A (1992), Dispersive Properties of Electromagnetically Induced Transiency. Phys. Rev. A. 46, R 29-32.
- Karawajezyk A (1991), Gain and Diffusion in an Inversionless Laser. Phys. Rev. A 44, R 28.
- Kassapi A, Jain M, Yin GY and Harris SE (1995), Coherent Amplification of an ultrashort Pulse in a three-level medium without population Inversion, Phys. Rev. Lett. 74, 2447-634.
- Kocharovaskaya O and Khanin Ya I (1989), Simple atomic systems in resonant Laser. Fields (1988) J.E.T.P. Lett. 48, 630-636.
- Kocharovaskaya O and Mandel P (1990), Theory of electromagnetically induced transparency, Phys. Rev. A 42, 523-529.
- Kocharovskaya O (1999), Coherent Optical control of Mosbuer Spectra, Opt. Comm. 77, 215-220.
- Kocharovskaya O and Mauri F (1991), From Lasers without Inversion to Grasses, Opt. Comm. 84, 393-399.
- Kocharovskaya W, Kolesov R and Rostoutsev Yu (1999), Lasing without Inversion, a new path to X-ray Laser. Laser Phys. 9, 745-758.
- Maiman TH (1960), Stimulated Optical emision in Ruby, Nature.187, 493-494.
- Narducei LM, Doss HM, Scully MO and Keitel CH (1999), Inversionless gain in three-level system. Opt. Commun. 81, 379-384.
- Padmabandu GG, Welch GR, Shubin IN, Fry ES, Nikonov DE, Lukin MD and Scully MO (1996), Laser oscillation without population inversion in a Sodium atomic beam. Phys. Rev. Lett. 76, 2053-2056.
- Sargent III M, Scully MO and Lamb WE Jr. (1974), Laser physics, Addison-Wesley Publishing Company, Reading, Massachusetts, p.18.
- Scully M O, Zhu S Y and Gavrielides A (1989), Degenerate quantum bit laser–Lasing without inversion and inversion without Lasing. Phys. Rev. Lett. 62, 2813-2816.
- Scully MO (1985), Lasing without inversion. Phys. Rev. Lett. 55, 2802-2806.
- Scully MO and Zubair MS (1997), Quantum optics, Cambridge University Press, Cambridge.
- Winters MP, Hall JL and Toschek PE (1990), Correlated Spontaneity envision in Zeeman Laser. Phys. Rev. Lett. 65, 3116-3119.
- Zebrov AS (1999),Lasing without inversion. Phys. Rev. Lett. 75, 1499-1510.
- Zhu Y (1992), Cascade inversionless and inversion Laser, Phys. Rev. A 45, R 6149-6153.
- Zhu Y and Min Xiao (1993), Inversionless Laser from a close multilevel system. Phys. Rev. A 47, 602-607.
- Spatial Hole Burning and its Analogy with some Non-physics Context
Abstract Views :387 |
PDF Views:275
Authors
Affiliations
1 C M J University, Modrina Mansion, Laitumkhra, Shillong-793003, Meghalaya, IN
2 Department of Physics, Digboi College, Digboi-786171, IN
3 Centre for Laser of Optical Science, New Uchamati, Doom Dooma-786151, IN
1 C M J University, Modrina Mansion, Laitumkhra, Shillong-793003, Meghalaya, IN
2 Department of Physics, Digboi College, Digboi-786171, IN
3 Centre for Laser of Optical Science, New Uchamati, Doom Dooma-786151, IN
Source
Indian Journal of Energy, Vol 1, No 4 (2012), Pagination: 45-49Abstract
The semi classical theory of laser as developed by Willis Lamb and coworkers several decades ago explains a large number of laser phenomena particularly in gaseous phase. In this theory it has been shown that, whenever we plot normalized population difference versus axial coordinates, there appears dips or holes at regular intervals at particular positions along the laser axis. These holes represent the depletion of population inversion thereby meaning the reduction of laser beam intensity. These holes are known as spatial holes. These holes are always present in laser originating from a Fabry-Perot cavity and are not welcome in the operation of high power laser. In the present work, we analyzed the phenomenon of spatial hole burning in the light of some non-physics context.Keywords
Spatial Hole Burning, Laser Beam Intensity, Fabry-perot Cavity, Non-physics ContextFull Text
References
- M. Sargent III, M.O. Scully and W. E. Lamb (1974).Jr. Laser Physics, Addison Wesley Publishing Company, Massachusetts, , pp 261-265.
- W. E. Lamb (1964) Jr. Phys. Rev., 134, A 1429
- W. E. Lamb (1963)Jr. The Theory of Optical Maser Oscillators in Proceeding of International School of Physics, Course XXXI.
- S. Stenholm and W. E. Lamb (1969) Jr., Phys. Rev., 181, 115.
- R. M. Borah and G. D. Baruah (1999), Asian J. of Chem., 3, 63.
- R. K. Dubey and G. D. Baruah (2010), Archives of Phys. Res., 1, 35.
- R. K. Dubey (2010), Investigation on V and Λ Schemes of Lasing Without Inversion, , Ph. D. thesis, Dibrugarh University.
- On the Nature of Laser Induced Fluorescence Spectrum of a Bore-Hole Sample of Coal
Abstract Views :484 |
PDF Views:291
Authors
Affiliations
1 Department of Chemistry, Dibru College, Dibrugarh-786003, Assam, IN
2 Department of Physics, Dibru College, Dibrugarh-786003, Assam, IN
3 Centre for Laser and Optical Science, New Uchamati, Doom Dooma-786151, Assam, IN
1 Department of Chemistry, Dibru College, Dibrugarh-786003, Assam, IN
2 Department of Physics, Dibru College, Dibrugarh-786003, Assam, IN
3 Centre for Laser and Optical Science, New Uchamati, Doom Dooma-786151, Assam, IN
Source
Indian Journal of Energy, Vol 1, No 3 (2012), Pagination: 1-2Abstract
The present work describes the fluorescence spectrum of a sample of coal recovered from a depth of about 2km from the surface as a bore hole sample by Oil India Limited at Duliajan .The fluorescence spectrum was excited with the help of a 25mW green diode pumped solid state laser (532nm).The characteristic feature of the spectrum is a diffuse band in the region 6500-5900AKeywords
Laser Induced Fluorescence, 25mW Green Diode, Bore-hole Sample of CoalFull Text
References
- Meyers R A (1982) Coal structure, Academic Press, New York.
- Baruah R.K, Bhattacharyya G.C, McFarlane U and Baruah G.D. (1995) Radial distribution (x- ray) study of heat treated Assam coal, Indian J.Pure & Appl Phys, 34(7), 500-501.
- Saikia B.K, Baruah R.K and Baruah G.D (2007) Laser induced fluorescence spectra of some high sulphur Assam Coals, India, Energy and Fuels, 21(6), 3744-3745
- Crelling J.C, Bensley D.F(1995), Recent advances in separating and characterizing single coal macerals: In, Pajares, J.A. and Tascon, J.M.D., eds. Coal Science-proceedings of the Eighth International Conference on Coal Science, Elsevier, Amsterdam, 1, 235-238.
- Clays of Assam and Meghalaya, a Physico-Chemical Study
Abstract Views :191 |
PDF Views:144
Authors
Affiliations
1 Dibrugarh University, Dibrugarh, IN
1 Dibrugarh University, Dibrugarh, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 27, No 5 (1986), Pagination: 464-469Abstract
No Abstract.Full Text