Mr. Pradeep Kumar Krishnamurthy Profile

Pradeep Kumar Krishnamurthy

Associate Professor at IIT Kanpur

SPIE Involvement:

Author

Proceedings Article | 5 March 2021 Presentation + Paper

Wave plate based stabilization of polarization at the distal end of multimode fiber for polarization sensitive imaging systems

P. Sai Shruti Rao, Pradeep Kumar Krishnamurthy

Proceedings Volume 11635, 116350R (2021) https://doi.org/10.1117/12.2582565

KEYWORDS: Polarization, Imaging systems, Multimode fibers, Wave plates, Photodiodes, Sensors, Polarizers, Optical testing, Light wave propagation, Helium neon lasers

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Proceedings Article | 20 February 2014 Paper

Pump suppressed four-wave mixing in optical fibers for correlated photon generation using feedback technique

Ankita Jain, Suchita ., K. Pradeep Kumar, R. Vijaya

Proceedings Volume 8964, 89641X (2014) https://doi.org/10.1117/12.2040045

KEYWORDS: Fiber Bragg gratings, Optical amplifiers, Four wave mixing, Signal attenuation, Nonlinear optics, Quantum cryptography, Optical fibers, Dispersion, Two wave mixing, Signal generators

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Proceedings Article | 12 February 2011 Paper

Quantum key distribution using transverse spin wave-optical interactions

Pradeep Kumar, Anil Prabhakar

Proceedings Volume 7948, 79481D (2011) https://doi.org/10.1117/12.873159

KEYWORDS: Photons, Quantum key distribution, Modulation, Waveguides, Phase shift keying, Computer programming, Receivers, Magnetism, Polarization, Phase matching

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Proceedings Article | 13 February 2008 Paper

All-fibre autocorrelator for optical pulse width measurement

Pradeep Kumar, Anil Prabhakar

Proceedings Volume 6875, 68751F (2008) https://doi.org/10.1117/12.763042

KEYWORDS: Interferometry, Oscilloscopes, Optical testing, Fiber lasers, Calibration, Femtosecond phenomena, Nonlinear optics, Mode locking, Sensors, Optical filters

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Proceedings Article | 22 December 2006 Paper

Design and development of the Cartosat payload for IRS P5 mission

D. Subrahmanyam, Saji Kuriakose, Pradeep Kumar, Jaimin Desai, Barkha Gupta, B. Sharma

Proceedings Volume 6405, 640517 (2006) https://doi.org/10.1117/12.693860

KEYWORDS: Cameras, Mirrors, Modulation transfer functions, Optical fabrication, Optical alignment, Signal to noise ratio, Imaging systems, Sensors, Space operations, Remote sensing

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Proceedings Article | 22 December 2006 Paper

LISS-4 camera for Resourcesat

Sandip Paul, Himanshu Dave, Chirag Dewan, Pradeep Kumar, Satwinder Singh Sansowa, Amit Dave, B. N. Sharma, Anurag Verma

Proceedings Volume 6405, 640510 (2006) https://doi.org/10.1117/12.693964

KEYWORDS: Cameras, Sensors, Electronics, Video processing, Video, Mirrors, Space telescopes, Telescopes, Signal to noise ratio, Logic

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The Indian Remote Sensing Satellites use indigenously developed high resolution cameras for generating data related to vegetation, landform /geomorphic and geological boundaries. This data from this camera is used for working out maps at 1:12500 scale for national level policy development for town planning, vegetation etc. The LISS-4 Camera was launched onboard Resourcesat-1 satellite by ISRO in 2003. LISS-4 is a high-resolution multi-spectral camera with three spectral bands and having a resolution of 5.8m and swath of 23Km from 817 Km altitude. The panchromatic mode provides a swath of 70Km and 5-day revisit. This paper briefly discusses the configuration of LISS-4 Camera of Resourcesat-1, its onboard performance and also the changes in the Camera being developed for Resourcesat-2. LISS-4 camera images the earth in push-broom mode. It is designed around a three mirror un-obscured telescope, three linear 12-K CCDs and associated electronics for each band. Three spectral bands are realized by splitting the focal plane in along track direction using an isosceles prism. High-speed Camera Electronics is designed for each detector with 12- bit digitization and digital double sampling of video. Seven bit data selected from 10 MSBs data by Telecommand is transmitted. The total dynamic range of the sensor covers up to 100% albedo. The camera structure has heritage of IRS- 1C/D. The optical elements are precisely glued to specially designed flexure mounts. The camera is assembled onto a rotating deck on spacecraft to facilitate ± 26° steering in Pitch-Yaw plane. The camera is held on spacecraft in a stowed condition before deployment. The excellent imageries from LISS-4 Camera onboard Resourcesat-1 are routinely used worldwide. Such second Camera is being developed for Resourcesat-2 launch in 2007 with similar performance. The Camera electronics is optimized and miniaturized. The size and weight are reduced to one third and the power to half of the values in Resourcesat-1.

Showing 5 of 6 publications

Conference Committee Involvement (1)

Lidar Remote Sensing for Environmental Monitoring VII

14 November 2006 | Goa, India

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