Prof. Narayana Rao Daggumati Profile

Prof. Narayana Rao Daggumati

at National Atmospheric Research Lab

SPIE Involvement:

Author

Proceedings Article | 7 February 2009 Paper

SiO2-SnO2 glass-ceramic planar waveguides activated by rare earth ions

S. N. B. Bhaktha, C. Armellini, F. Beclin, M. Bouazaoui, B. Capoen, A. Chiappini, A. Chiasera, M. Ferrari, Y. Jestin, C. Kinowski, E. Moser, D. N. Rao, G. Righini, S. Turrell

Proceedings Volume 7212, 721207 (2009) https://doi.org/10.1117/12.808277

KEYWORDS: Nanocrystals, Ions, Waveguides, Glasses, Silica, Luminescence, Absorption, Crystals, Transmission electron microscopy, Planar waveguides

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Proceedings Article | 18 October 2007 Paper

Rayleigh Lidar investigation of stratospheric sudden warming over a low latitude station, Gadanki (13.5ºN; 79.2ºE): a statistical study

D. Charyulu, V. Sivakumar, H. Bencherif, D. Narayana Rao

Proceedings Volume 6681, 66810X (2007) https://doi.org/10.1117/12.739275

KEYWORDS: LIDAR, Temperature metrology, Stratosphere, Atmospheric propagation, Climatology, Wave propagation, Satellites, Data centers, Radio propagation, Atmospheric monitoring

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SPIE Journal Paper | 1 August 2007

Resonance lidar system for mesospheric sodium measurements

Bhavani Kumar, D. Narayana Rao, M. Sundara Murthy, M. Krishnaiah

OE, Vol. 46, Issue 08, 086203, (August 2007) https://doi.org/10.1117/12.10.1117/1.2767271

KEYWORDS: Sodium, LIDAR, Photons, Chemical species, Dye lasers, Backscatter, Scattering, Optical engineering, Laser scattering, Wave propagation

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Proceedings Article | 12 December 2006 Paper

Diurnal variation of boundary layer using different methods

V. Murty, Ugendar Kodam, Kumar Bhavani, Rao Narayana

Proceedings Volume 6409, 640906 (2006) https://doi.org/10.1117/12.693888

KEYWORDS: LIDAR, Interference (communication), Aerosols, Optical inspection, Laser scattering, Mie scattering, Scattering, Backscatter, Signal attenuation, Atmospheric optics

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Proceedings Article | 12 December 2006 Paper

Lidar observations of sporadic Na layers over Gadanki (13.5° N, 79.2° E)

P. Vishnu Prasanth, Y. Bhavani Kumar, D. Narayana Rao

Proceedings Volume 6409, 64090S (2006) https://doi.org/10.1117/12.693376

KEYWORDS: Solid state lighting, Sodium, LIDAR, Einsteinium, Dye lasers, Atmospheric chemistry, Atmospheric laser remote sensing, Atmospheric sensing, Astatine, Atmospheric particles

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Proceedings Article | 12 December 2006 Paper

Lidar observation of gravity wave characteristics in the tropical middle atmosphere

Maria Antonita T, Geetha Ramkumar, Bhavani Kumar, D. Rao

Proceedings Volume 6409, 64090O (2006) https://doi.org/10.1117/12.694338

KEYWORDS: LIDAR, Convection, Wave propagation, Radar, Atmospheric propagation, Atmospheric monitoring, Rockets, Wind energy, Error analysis, Wavelets

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Proceedings Article | 8 December 2006 Paper

Cirrus observations using ground-based LIDAR and Terra MODIS instrument

Padmavati Kulkarni, Y. Bhavani Kumar, P. Vishnu Prasanth, D. Narayana Rao, M. Krishniah

Proceedings Volume 6408, 64080B (2006) https://doi.org/10.1117/12.697529

KEYWORDS: Clouds, LIDAR, MODIS, Reflectivity, Climatology, Environmental sensing, Space operations, Beam splitters, Satellites, Analytical research

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Proceedings Article | 8 December 2006 Paper

Studies of radar bright band using UHF radar at Gadanki

N. V. P. Kiran Kumar, T. Narayana Rao, D. Narayana Rao, P. K. Kunhikrishnan

Proceedings Volume 6408, 64081J (2006) https://doi.org/10.1117/12.694120

KEYWORDS: Radar, Reflectivity, Doppler effect, Particles, Dielectrics, Microwave radiation, Space operations, Atmospheric physics, Classification systems, Detection and tracking algorithms

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Proceedings Article | 4 April 2005 Paper

Spectroscopic properties of Er3+-activated Ag-exchanged silicate and phosphate glasses

Shivakiran Bhaktha, Roberto Calzolai, Andrea Chiappini, Alessandro Chiasera, Maurizio Ferrari, Yoann Jestin, Maurizio Mattarelli, Maurizio Montagna, Enrico Moser, Gualtiero Nunzi Conti, Stefano Pelli, Herve Portales, Desai Rao, Giancarlo Righini, Cristiana Tosello, Krishna Vishunubhatla, Jie Zheng

Proceedings Volume 5723, (2005) https://doi.org/10.1117/12.590344

KEYWORDS: Erbium, Glasses, Silver, Absorption, Nanoparticles, Ions, Annealing, Luminescence, Silicates, Heat treatments

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Proceedings Article | 4 April 2005 Paper

Optical and spectroscopic properties of erbium-activated modified silica glass with 1.54 µm high quantum efficiency

Vincent Benoit, Shivakiran Narasimha Bantwal Bhaktha, Brigitte Boulard, Stephane Chaussedent, Andrea Chiappini, Alessandro Chiasera, Eugene Duval, Serge Etienne, Maurizio Ferrari, Bruno Gaillard-Allemand, Yoann Jestin, Maurizio Mattarelli, Maurizio Montagna, Andre Monteil, Enrico Moser, Gualtiero Nunzi Conti, Stefano Pelli, Herve Portales, Desai Rao, Giancarlo Righini, Krishna Chaitanya Vishunubhatla

Proceedings Volume 5723, (2005) https://doi.org/10.1117/12.590252

KEYWORDS: Glasses, Erbium, Absorption, Ions, Quantum efficiency, Refractive index, Spectroscopy, Silica, Luminescence, Raman spectroscopy

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Proceedings Article | 14 February 2003 Paper

Optical limiting due to frequency up-converted fluorescence in DASPB-dye-doped polymer matrix

P. Sreeramana Aithal, Ravindra Singh, Narayana Rao

Proceedings Volume 4797, (2003) https://doi.org/10.1117/12.453323

KEYWORDS: Absorption, Luminescence, Optical limiting, Transmittance, Nonlinear optics, Polymers, Molecules, System on a chip, Americium

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Proceedings Article | 14 February 2003 Paper

Optical limiting studies of disperse orange and disperse yellow in PMMA-MA matrix

Ravindra Singh, P. Sreeramana Aithal, Narayana Rao

Proceedings Volume 4797, (2003) https://doi.org/10.1117/12.453540

KEYWORDS: Absorption, Optical limiting, Dysprosium, Continuous wave operation, Transmittance, Refraction, Polymers, Molecules, Thin films, Sensors

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Proceedings Article | 16 January 2002 Paper

Numerical simulations of solvent effects on optical transmission processes for zinc porphyrins

Masato Nakashima, Landa Hoke, Brian Kimball, Gregory Kowalski, Barry DeCristofano, Paula Rosenof, Desai Rao, Devulapalli Rao

Proceedings Volume 4462, (2002) https://doi.org/10.1117/12.452720

KEYWORDS: Picosecond phenomena, Transmittance, Nonlinear optics, Zinc, Quantum efficiency, Numerical simulations, Absorption, Thermal effects, Thermal modeling, Laser beam propagation

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Proceedings Article | 21 December 2000 Paper

Tropical precipitation studies using VHF/L-band windprofilers and disdrometer over Gadanki, India

K. Krishna Reddy, Kenji Nakamura, Toshiaki Kozu, A. Jain, D. Narayana Rao

Proceedings Volume 4152, (2000) https://doi.org/10.1117/12.410624

KEYWORDS: Radar, Reflectivity, Meteorology, Clouds, Doppler effect, Classification systems, Antennas, Atmospheric optics, Climatology, Turbulence

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Proceedings Article | 29 November 2000 Paper

Solvent effect on optical limiting of zinc tetrabenzoporphyrin compounds

Brian Kimball, Masato Nakashima, Barry DeCristofano, N.K.M. Naga Srinivas, P. Premkiran, Desai Rao, Appaji Panchangam, Devulapalli Rao

Proceedings Volume 4106, (2000) https://doi.org/10.1117/12.408513

KEYWORDS: Absorption, Picosecond phenomena, Optical limiting, Data modeling, Zinc, Nonlinear optics, Molecules, Solids, Chlorine, Sensors

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Proceedings Article | 9 November 1999 Paper

Self-focusing, self-trapping, and optical limiting of light beams in photorefractive Bi12SiO20:Fe crystal

P. Sreeramana Aithal, Prem Kiran, Desai Rao

Proceedings Volume 3899, (1999) https://doi.org/10.1117/12.369427

KEYWORDS: Crystals, Absorption, Laser crystals, Nonlinear crystals, Optical limiting, Iron, Nonlinear optics, Beam shaping, Refractive index, Beam propagation method

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Proceedings Article | 7 October 1996 Paper

Nonlinear absorption of tetrabenzporphyrins

Francisco Aranda, Desai Rao, Devulapalli Rao, Masato Nakashima, Barry DeCristofano

Proceedings Volume 2853, (1996) https://doi.org/10.1117/12.253474

KEYWORDS: Absorption, Molecules, Picosecond phenomena, Thin films, Molecular aggregates, Glasses, Saturable absorption, Polymethylmethacrylate, Sensors, Chromophores

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Proceedings Article | 3 October 1996 Paper

All-optical logical gates with bacteriorhodopsin films

Devulapalli Rao, Francisco Aranda, Desai Rao, Z. Chen, Joseph Akkara, Masato Nakashima

Proceedings Volume 2897, (1996) https://doi.org/10.1117/12.252925

KEYWORDS: Proteins, Photonics, Molecular photonics, Genetics, Optical computing, Data processing, Thin films, Switches, Logic, Four wave mixing

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Showing 5 of 18 publications

SPIE Conference Volume | 30 November 2006

Lidar Remote Sensing for Environmental Monitoring VII

Conference Committee Involvement (2)

Lidar Remote Sensing for Environmental Monitoring VIII

29 August 2007 | San Diego, California, United States

Lidar Remote Sensing for Environmental Monitoring VII

14 November 2006 | Goa, India

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