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School of Natural Sciences
Centre for Applied Physics
Profile of Faculty
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Dr. Sarang Medhekar
Professor
Ph.D: Devi Ahilya Vishwavidyalaya-1996 Cell: +91-9431382715 E-Mail smedhekarbit@gmail.com |
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| Area of Interest | Photonic Devices, All-optical Devices, Photonic Crystals | |
| Involvement in Funded Projects | 1.Theoretical Investigation of Induced Nonlinear Optical Fiber Waveguides and Devices. CI: P. K. Barhai 2.Investigation of the effects of higher order nonlinearities on optical pulse propagation in semiconductor doped glass fibers and waveguides: CI: P. K. Barhai 3.Propagation behavior of a Gaussian beam in cubic quintic nonlinear medium. SRF: Mr. P. P. Paltani 4.Investigation of Light Beam Propagation in Nonlinear Bulk/Waveguide Media for All-optical devices. SRF: Mr. R. K. Sarkar 5.Modeling and Analysis of Mach-Zhender Interferometer based Nonlinear Waveguide Devices for All-Optical Switching and Logic Gates 6.Investigation of Optical Beam Propagation in Nonlinear Media: Spatial Soliton Formation and Their Interaction for All-Optical Devices 7.Modeling and Analysis of Nonlinear Waveguide Devices for All-Optical Switching and Logic Gates. Woman Scientist: Mrs. Arpita Srivastav |
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| LIST OF PUBLICATION (Articles In Journals) | 1.“Maximum possible transverse velocity in special relativity” S. Medhekar, Physics Education Vol.7, No.4, p-320-322(1991). 2.“Propagation of Gaussian laser beams in a nonlinear radially inhomogeneous absorbing medium with arbitrary nonlinearity” S. Medhekar, Rajkamal and A.Saxena, Ind. J. Pure & Appl. Phys.Vol.31, p-605-609(Sept.1993). 3.“Absorption/Amplification induced self tapering and uptapering of a laser beam in a saturable nonlinear medium: large nonlinearity” M.S.Sodha, S. Medhekar, S.Konar, A.Saxena and Rajkamal, Optics Letters, Vol.19, No.15, p-1110(Aug.1st 1994). 4.“Self tapering and uptapering of a self guided laser beam in an absorption/gain medium with arbitrary nonlinearity”, S. Medhekar, S.Konar and Rajkamal, Pramana-Journal of physics, vol.44, No.3, p-249(March1995). 5.“Successive uptapering and stationary self trapped propagation of a laser beam in a saturating nonlinear medium” S Medhekar, S.Konar and Rajkamal, Lasers & Particle Beams, Vol.13, No.4, p-559(1995). 6.“Profile of radial inhomogeinity for stationary self trapped propagation of laser beams in a nonlinear absorbing/amplifying medium with arbitrary nonlinearity” S Medhekar, S.Konar and Rajkamal, IL NUOVO CIMENTO D, Vol.17, p-351,(1995). 7.“Self tapering of elliptic beams in elliptic core nonlinear fibers”, S Medhekar, S. Konar and M.S.Sodha, Optics Letters, Vol.20, No.21, p-2192 (1995). 8.“Optical Power filter: A new kind of passive nonlinear optical device” S Medhekar, M.S.Sodha and S.Konar, Optics Letters, Vol.20, No.4, p-305(1996). 9.“Displacement and Deflection of Optical Beams by Nonlinear Planer Waveguide” S.Konar, P.K.Barhai and S Medhekar, J. of Nonlinear Optical Physics & Materials, Vol. 12, No. 1, p.101-112 (2003) USA. 10.“All-optical Passive Transistor” S Medhekar and Ramkrishna Sarkar, Optics Letters, vol. 30, No. 8, April 2005, pp-887-889. 11.“Coupled Spatial-Soliton Pairs in Saturating Medium., S Medhekar, R. K. Sarkar and P. P. Paltani, Optics Letters vol. 31, No. 1 Jan. 2006, pp-77-79. 12.All-optical bistable and astable multivibrators” S Medhekar and Ram Krishna Sarkar Nonlinear Optics, Quantum Optics, vol. 35, Sept. 2006, pp-287-296.. 13.“Passive, ‘Self-Trapped Family’ All-Optical Half Adder using All-Optical X-OR, and AND Gate” S Medhekar and Ram Krishna Sarkar Czechoslovak J. Physics, Vol. 56, No. 4 (2006) pp-359-366. 14.“Propagation of Doughnut mode in Nonlinear Media” Ram Krishna Sarkar and S Medhekar Nonlinear Optics, Quantum Optics Vol. 35, Sept. (2006) pp-275-286. 15.“Proposal for an All-Optical Switch” S. Medhekar and Punya Prasanna Paltani IEEE Photonics Technology Letters Vol. 18 , No. 15 Aug. (2006) pp-1579-1581. 16.“All-Optical Switching and Tunable Wavelength Filtering in Grating Assisted Directional Coupler” S Medhekar and Punya Prasanna Paltani Nonlinear Optics, Quantum Optics Vol. 36 , (2007) pp-81-90. 17.“Synchronous Couplers Made of Symmetric and Asymmetric Slabs”, Punya P. Paltani and S. Medhekar, Nonlinear Optics, Quantum Optics Vol. 36 , (2007) pp-129-145. 18.“Spatial Solitons of desired intensity and width and their Self-Tapering/Uptapering in Cubic Quintic Nonlinear Medium”, Ram Krishna Sarkar and S. Medhekar, Physica Scripta, Vol. 76, (2007) pp-683-688. 19.“Soliton Pairing of Two Coaxially Co-Propagating Mutually Incoherent 1-D Beams in Kerr Type Media”, S. Medhekar, Ram Krishna Sarkar and Punya P. Paltani, Optica Applicata, XXXVII, 243-259 (2007). 20.“Novel All-Optical Switch using Nonlinear Mach-Zehnder Interferometer” S. Medhekar and Punya prasanna Paltani, Fiber and Integrated Optics Vol.28 Number 3 (2009) p. 229-236. 21.“All-Optical transistor using counter propagating beams in a Nonlinear Mach-Zehnder Interferometer” S. Medhekar and Punya prasanna Paltani, Fiber and Integrated Optics Vol.28 Number 4 (2009) p. 268-274. 22.Spatial soliton pairing of two cylindrical beams in saturable nonlinear media, R. K. Sarkar and S Medhekar, Progress In Electromagnetics Research M, Vol. 9, 53-64, 2009 23.“Mutual-focusing of two co-propagating beams and formation of trapped spatial breather pair in saturable nonlinear media” Ram Krishna Sarkar and S. Medhekar, OPTIK 121 (2010) p-339–346. 24.Switching Behaviour of a Nonlinear Mach-Zehnder Interferometer, Arpita Srivastava, Punya Prasanna Paltani and S. Medhekar, Pramana, Vol.74 Number 4 (2010) p. 575-590. 25.“Optimally Stabilized Beam Pairs”, Punya Prasanna Paltani and S. Medhekar, OPTIK, vol. 122, issue 1, pp. 70-75(2011). 26.All-optical Circulator Based on Cross Phase Modulation in a Nonlinear Mach-Zehnder Interferometer, Punya Prasanna Paltani and S. Medhekar, OPTIK, Volume 122, Issue 5, March 2011, Pages 464-466. 27.Switching of One Beam by Another in a Kerr Type Nonlinear Mach-Zehnder Interferometer, Arpita Srivastava and S. Medhekar, Optics & Laser Technology, vol. 43, issue 1, pp. 29-35(2011). 28.Coupled tapered / uptapered optical beams” Arpita Srivastava, Ram Krishna Sarkar, Shraddha Prasad and S. Medhekar, OPTIK, 122 (2011) 2039– 2043 29.Switching Behaviour of a Nonlinear Mach-Zehnder Interferometer; Saturating Nonlinearity” authored by Arpita Srivastava and S. Medhekar Optics & LaserTechnology 43 (2011) 1208–1211 30.Coupled Propagation in Electromagnetically Induced Transparent Medium; Thirring Type Soliton Pairs and Breather Pairs” Authored by Shraddha Prasad, Ram Krishna Sarkar, Arpita Srivastava and S. Medhekar , Journal of Electromagnetic Waves and Application, J. of Electromagn. Waves and Appl., Vol. 25, 923–933, 2011. 31.Investigations on the combustion parameters of a dual fuel diesel engine with hydrogen and LPG as secondary fuels by D. B. Lata, A. Mishra and S. Medhekar, International Journal of Hydrogen Energy Vol. 36, 13808–13819, 2011 32.Signal amplification based on the local nonlinear Mach–Zehnder interferometer by Arpita Srivastava, Man Mohan Gupta, S. Medhekar, Optics & Laser Technology, Vol. 44, 492–496, 2011 33.Effect of hydrogen and LPG addition on the efficiency and emissions of a dual fuel diesel engine, D. B. Lata, A. Mishra and S. Medhekar, International Journal of Hydrogen Energy Vol. 37, Pages 6084–6096, 2012 34.Arpita Srivastava and S. Medhekar, Switching Behavior of a Nonlinear Mach-Zehnder Interferometer with Exponentially Saturable Nonlinearity. Optical engineering (SPIE), 51(7), 074604 (July 2012) 35.Arpita Srivastava and S. Medhekar, 2012. Effect of change in core width and core refractive index on the Switching Behaviour of a Nonlinear Mach-Zehnder Interferometer. Optical engineering (SPIE), Opt. Eng. 51(9), 094601 (Sep 12, 2012). |
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| Patent | Mechanical load stabilizer with load dependent stepless gear ratio variation system (Patent No.223097) | |