| Optical encryption by double-random phase encoding in the fractional Fourier domain G Unnikrishnan, J Joseph, K Singh Optics letters 25 (12), 887-889, 2000 | 1347 | 2000 |
| Double random fractional Fourier domain encoding for optical security G Unnikrishnan, K Singh Optical Engineering 39 (11), 2853-2859, 2000 | 300 | 2000 |
| A known-plaintext heuristic attack on the Fourier plane encryption algorithm U Gopinathan, DS Monaghan, TJ Naughton, JT Sheridan Optics Express 14 (8), 3181-3186, 2006 | 258 | 2006 |
| Optical encryption system that uses phase conjugation in a photorefractive crystal G Unnikrishnan, J Joseph, K Singh Applied Optics 37 (35), 8181-8186, 1998 | 217 | 1998 |
| Key-space analysis of double random phase encryption technique DS Monaghan, U Gopinathan, TJ Naughton, JT Sheridan Applied optics 46 (26), 6641-6647, 2007 | 103 | 2007 |
| Cryptanalysis of optical security systems with significant output images G Situ, U Gopinathan, DS Monaghan, JT Sheridan Applied Optics 46 (22), 5257-5262, 2007 | 102 | 2007 |
| Optical encryption using quadratic phase systems G Unnikrishnan, K Singh Optics Communications 193 (1-6), 51-67, 2001 | 98 | 2001 |
| Coded apertures for efficient pyroelectric motion tracking U Gopinathan, DJ Brady, NP Pitsianis Optics express 11 (18), 2142-2152, 2003 | 95 | 2003 |
| A polarization encoded optical encryption system using ferroelectric spatial light modulator G Unnikrishnan, M Pohit, K Singh Optics communications 185 (1-3), 25-31, 2000 | 80 | 2000 |
| Generalized in-line digital holographic technique based on intensity measurements at two different planes G Situ, JP Ryle, U Gopinathan, JT Sheridan Applied optics 47 (5), 711-717, 2008 | 74 | 2008 |
| Polarization encoding and multiplexing of two-dimensional signals: application to image encryption U Gopinathan, TJ Naughton, JT Sheridan Applied optics 45 (22), 5693-5700, 2006 | 64 | 2006 |
| Spread-space spread-spectrum technique for secure multiplexing BM Hennelly, TJ Naughton, J McDonald, JT Sheridan, G Unnikrishnan, ... Optics letters 32 (9), 1060-1062, 2007 | 62 | 2007 |
| Coherence effects in digital in-line holographic microscopy U Gopinathan, G Pedrini, W Osten JOSA A 25 (10), 2459-2466, 2008 | 58 | 2008 |
| Optical encryption using a localized fractional Fourier transform NK Nishchal, G Unnikrishnan, J Joseph, K Singh Optical Engineering 42 (12), 3566-3571, 2003 | 46 | 2003 |
| Fractional Fourier domain encrypted holographic memory by use of an anamorphic optical system G Unnikrishnan, J Joseph, K Singh Applied optics 40 (2), 299-306, 2001 | 46 | 2001 |
| Role of phase key in the double random phase encoding technique: an error analysis DS Monaghan, G Situ, U Gopinathan, TJ Naughton, JT Sheridan Applied optics 47 (21), 3808-3816, 2008 | 45 | 2008 |
| A projection system for real world three-dimensional objects using spatial light modulators U Gopinathan, DS Monaghan, BM Hennelly, CP McElhinney, DP Kelly, ... Journal of Display Technology 4 (2), 254-261, 2008 | 42 | 2008 |
| Noninterferometric phase retrieval using a fractional Fourier system U Gopinathan, G Situ, TJ Naughton, JT Sheridan Journal of the Optical Society of America A 25 (1), 108-115, 2007 | 36 | 2007 |
| Paraxial speckle-based metrology systems with an aperture DP Kelly, JE Ward, BM Hennelly, U Gopinathan, FT O’Neill, JT Sheridan Journal of the Optical Society of America A 23 (11), 2861-2870, 2006 | 34 | 2006 |
| Analysis of phase encoding for optical encryption DS Monaghan, G Situ, U Gopinathan, TJ Naughton, JT Sheridan Optics Communications 282 (4), 482-492, 2009 | 29 | 2009 |