Sri Venkateswara College University of Delhi India BSc (H)
Maharshi Dayanand University, Rohtak India BEd
Indian Institute of Technology (ISM) Dhanbad India MSc
Indian Institute of Technology (ISM) Dhanbad India PhD
November 2020 to August 2022, Postdoctoral Research Fellow, Ben-Gurion University of the Negev, Israel
November 2019 to November 2020, Postdoctoral Research Fellow, Nanjing University of Science and Technology, China
July 2018 - July 2019, Postdoctoral Research Fellow, National University of Singapore, Singapore
Optical Information Processing
Quantitative Phase Imaging
Awards & Fellowships
2020 – PBC Fellowship – Planning & Budgeting Committee (PBC) of the Council for Higher Education (CHE), Israel, 2020
2020 – India Top Cited Paper Award - IOP Publishing
2016 – Best poster Award in national conference NCLC-2016, held at IIT(ISM) Dhanbad
2016 – Best poster award in international conference q-PaCE-2016, held at IIT(ISM) Dhanbad
2014 – Qualified CSIR-UGC NET exam (All India Rank 84) in Physical Sciences.
OSA Member, March 2021 - till now
Sachin, Phool Singh, Ravi Kumar, and AK Yadav, Asymmetric Cryptosystem for Color Images Based on Unequal Modulus Decomposition in Chirp-Z Domain, Proceedings of Academia-Industry Consortium for Data Science: AICDS 2020, Volume 1411, Advances in Intelligent Systems and Computing, ISBN: 978-981-16- 6886-9, Springer Singapore, 2021.
Published in Journals:
Y. Xiong and Ravi Kumar* , Security analysis on asymmetric optical cryptosystem based on interference and equal modulus decomposition, Optical and Quantum Electronics, Accepted, 2022. (*Corresponding author)
Vijayakumar Anand† , Svetlana Khonina† , Ravi Kumar, Nitin Dubey, Andra Naresh Kumar Reddy, Joseph Rosen and Saulius Juodkazis, Three-dimensional Incoherent Imaging Using Spiral Rotating Point Spread Functions Created by Double-helix Beams [invited], Nanoscale Research Letter 17, 37, 2022.
Nathaniel Hai† , Ravi Kumar† , and Joseph Rosen, Single-shot TIE using polarization multiplexing (STIEP) for quantitative phase imaging. Optics and Lasers in Engineering 151, 106912, 2022. (†Equal contribution)
Sachin, Ravi Kumar* , and Phool Singh, Modified plaintext-attacks in a session for an optical cryptosystem based on DRPE with PFS, Applied Optics 61(2), 623-628, 2022. (*Corresponding author)
Nitin Dubey, Ravi Kumar, and Joseph Rosen, COACH-based Shack–Hartmann wavefront sensor with an array of phase coded masks, Optics Express 29(20), 31859- 31874, 2021.
Sachin, Ravi Kumar* , Phool Singh, Unequal modulus decomposition and modified Gerchberg Saxton algorithm based asymmetric cryptosystem in Chirp-Z transform domain, Optical and Quantum Electronics 53(5), 254, 2021. (*Corresponding author)
Phool Singh† , Ravi Kumar†,*, AK Yadav, and Kehar Singh, Security analysis and modified attack algorithms for a nonlinear optical cryptosystem based on DRPE, Optics and Lasers in Engineering 139, 106501, 2021. (†Equal contribution and *corresponding author)
Eakta Kumari, Saurabh Mukherjee, Phool Singh, and Ravi Kumar* , Asymmetric Color Image Encryption and Compression based on Discrete Cosine Transform in Fresnel Domain, Results in Optics 1, 100005, 2020. (*Corresponding author)
Pankaj Rakheja, Phool Singh, Rekha Vig, and Ravi Kumar, Double image encryption scheme for iris template protection using 3D Lorenz system and modified equal modulus decomposition in hybrid transform domain, Journal of Modern Optics 67(7), 592-605, 2020.
R. Kumar and C. Quan, Asymmetric multi-user optical cryptosystem based on polar decomposition and Shearlet transform, Optics and Lasers in Engineering 120, 118- 126, 2019.
Fuqiang Zhong, Ravi Kumar, and Quan Chenggen, RGB laser speckles-based 3D profilometry, Applied Physics Letters 114(20), 201104, 2019.
Ravi Kumar, Fuqiang Zhong, and Quan Chenggen, Optical voice information hiding using enhanced iterative algorithm and computational ghost imaging, Journal of Optics 21(6), 065704, 2019.
Y. Xiong, R. Kumar, and C. Quan, Security analysis on an optical encryption and authentication scheme based on phase-truncation and phase-retrieval algorithm, IEEE Photonics Journal 11(5), 7801514, 2019.
R. Kumar and C. Quan, Optical color image encryption using spiral phase transform and chaotic pixel scrambling, Journal of Modern Optics 66(7), 776-785, 2019.
Fuqiang Zhong, Ravi Kumar, and Quan Chenggen, A cost-effective single-shot structured light system for 3D shape measurement, IEEE Sensors Journal 19(17), 7335-7346, 2019.
Pankaj Rakheja, Rekha Vig, Phool Singh, and Ravi Kumar, An Iris biometric protection scheme using 4D hyperchaotic system and modified equal modulus decomposition in hybrid multi resolution wavelet domain, Optical and Quantum Electronics 51(6), 204, 2019.
Ravi Kumar, Basanta Bhaduri, and John T. Sheridan, Nonlinear double image encryption using 2D non-separable linear canonical transform and phase retrieval algorithm, Optics & Laser Technology 107, 353-360, 2018.
Ravi Kumar, Basanta Bhaduri, and Bryan Hennelly, QR code based nonlinear image encryption using Shearlet transform and spiral phase transform, Journal of Modern Optics 65(3), 321-330, 2018.
Ravi Kumar, Basanta Bhaduri, and Naveen K. Nischal, Nonlinear QR code based optical image encryption using spiral phase transform, equal modulus decomposition and singular value decomposition, Journal of Optics 20(1), 015701, 2018.
Ravi Kumar, Basanta Bhaduri, and Quan Chenggen, Asymmetric optical image encryption using Kolmogorov phase screens and equal modulus decomposition, Optical Engineering 56(11), 113109, 2017.
Ravi Kumar and Basanta Bhaduri, Optical image encryption in Fresnel domain using spiral phase Transform, Journal of Optics 19(9), 095701, 2017.
Ravi Kumar and Basanta Bhaduri, Optical image encryption using Kronecker product and hybrid phase masks, Optics & Laser Technology 95, 51-55, 2017.
Proceedings available online:
Nitin Dubey, Ravi Kumar, and Joseph Rosen, COACH-based Shack-Hartmann wavefront sensor, OSA Imaging and Applied Optics Congress 2021 (3D, COSI, DH, ISA, pcAOP), OSA Technical Digest (Optical Society of America, 2021), paper DW5C.
Ravi Kumar and Quan Chenggen, Multiuser optical information authentication using photon counting in spiral phase transform domain, Proc. SPIE 11027, Quantum Optics and Photon Counting 2019, 110270D.
Ravi Kumar and Basanta Bhaduri, Double image encryption in Fresnel domain using wavelet transform, gyrator transform and spiral phase masks, Proc. SPIE 10449, Fifth International Conference on Optical and Photonics Engineering, 104490O.
Presented in international/national conferences:
Jawahar Prabhakar Desai, Ravi Kumar, and Joseph Rosen, Optical incoherent synthetic aperture imaging using synthesized optical transfer function of phase- shifted pair of sub-apertures along the periphery, Day of Light 2022: young researchers conference, Ben-Gurion University of the Negev, 23rd May 2022.
Nitin Dubey, Ravi Kumar, and Joseph Rosen, COACH-based Shack-Hartmann wavefront sensor, International Day of Light 2021: young researchers conference, Ben-Gurion University of the Negev, 20th May 2021.
Ravi Kumar, “Optical information security: future perspectives,” International Conference on “Trends in Computational and Cognitive Engineering (TCCE)” held at Central University of Haryana, Mahendergarh, India, 28th – 30th November 2019. (Plenary talk)
Ravi Kumar and Basanta Bhaduri, Nonlinear Optical Image Encryption using Interferometry and Gyrator Transform, 23rd National Conference on Liquid Crystals (NCLC 2016), Indian Institute of Technology (Indian School of Mines), Dhanbad- 826004, India, December 7th- 9th, 2016.
Ravi Kumar and Basanta Bhaduri, Optical Encryption Security Enhancement using Kronecker Tensor, National Conference on Recent Advances in Science and Engineering (RASE 2016), Indian School of Mines, Dhanbad-826004, India, March 28th-29th, 2016.
32. Ravi Kumar and Basanta Bhaduri, Optical Image Encryption Using Hankel Transform, International Topical Conference on Charged Particle Collisions and Electronic Process in Atoms, Molecules and Materials (q-PaCE 2016), Indian School of Mines, Dhanbad-826004, India, January 9th-11th, 2016.