An International Research Journal


SSN : 0971 - 3093

Vol  15, Nos. 3&4, July-December, 2006

Asian Journal of Physics                                                                                                        Vol. 15, No 3 (2006) 199-202

Stokes Interferometry- First Experimental Results

 Vladimir G Denisenkoa ,Vladimir V Slyusara, Marat S Soskina and Isaac Freundb
aInstitute of Physics, National Academy of Science of Ukraine, 46 Prospekt Nauki, Kiev-39, 03650, Ukraine

 bDepartment of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel


First experimental results are presented for a new form of interferometry based on the use of crosspolarised sample and reference beams and a measurement of the Stokes parameters of the combined beam. This new method is used to obtain a high resolution phase map of a Gaussian laser beam containing an on-axis optical vortex. These initial experimental results are compared with the standard forked fringe interferometric method for measuring optical vortices, and with the theoretical phase map. Excellent agreement is found in all cases, thereby verifying the accuracy of the method. and paving the way for its use in the study of random speckle patterns, as well as in metrologic and other applications.© Anita Publications. All rights reserved.



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Asian Journal of Physics                                                                                                       Vol. 15, No. 3 (2006) 203-209

Seidel coefficients in optical testing

1Virendra N. Mahajan*, and 2William H. Swantner,
1The Aerospace Corporation, El Segundo, CA 90245, USA
2Optical Engineering Services, 433 Live Oak Loop NE, Albuquerque NM 87122, USA


Determination of the Seidel aberration coefficients from Zernike aberration coefficients obtained in optical testing is discussed, and potential pitfalls in the determination process are explained. © Anita Publications. All rights reserved.

Total Refs :12



Asian Journal of Physics                                                                                                       Vol 15, No. 3, (2006) 211-222

A k-space analysis of holographic particle image velocimetry

J M Coupland, N A Halliwell, R D Alcock and C P Garner
Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University,
Ashby Road, Lougborough, Leics. LEI I 3TU


This paper introduces a new three-dimensional, k-space formulation of scalar wave propagation and describes its use in the analysis of Holographic Particle Image Velocimetry (HPIV). In particular, it is shown that the three-dimensional autocorrelation of scattered fields can be calculated from measurements of the power in the propagating plane wave components. In addition it is shown that this method, which we refer to as Complex Correlation Analysis, is tolerant to phase aberrations introduced by windows or distortions introduced by the holographic recording process. A similar approach is used to analyse the Object Conjugate Reconstruction (OCR) technique to resolve directional ambiguity by introducing an artificial image shift to the reconstructed particle images. An example of how these methods are used together to measure the instantaneous flow fields within a motored Diesel engine is then described. Anita Publications. All rights reserved.

Total Refs: 12


Asian Journal of Physics                                                                                                       Vol 15, No. 3, (2006) 223-231


Adaptive reconfigurable optical interconnects

T D Wilkinson, D Gil-Leyva and C Henderson
Cambridge University, Department of Engineering.
Trumpington St, Cambridge CB2 I PZ


The next generation of applications for liquid crystal over silicon technolgy will be non-display oriented systems such as adaptive optical interconnects, optical switches and optical image processors. We have been developing these new applications both as reconfigurable optical interconnects (or switches) and adaptive optical interconnects. There is a growing need for optically transparent interconnects in both telecommunications networks as well as board to board and chip to chip systems and reconfigurable phase gratings or holograms offer a very exciting solution. Free space optical data transmission is becoming more and more important as the data rate in electronic systems increases into the GHz 7egion in order to avoid data bottlenecks. Past research into free-space optical links has shown that a high level of manufacturing tolerance must be used to maintain the link, however, one way of avoiding these limitation is to use a reconfigurable liquid crystal phase hologram as a beam steering element to compensate for movement between the boards and maintain the optical data path. In this paper we present recent results in utilising phase holograms to steer 5.-ee space optical beams in both a telecommunications switch and a board to board interconnect. © Anita Publications. All rights reserved.

Total Refs: 14


Asian Journal of Physics                                                                                                       Vol 15, No. 3, (2006) 233-242


Production and applications of single crystal optical fibres

J H Sharp1, C W P Shi1, I A Watson1 and H C Seat2
1Laser & Optical Systems Engineering Centre, Department of Mechanical Engineering
University of Glasgow, Glasgow G I 2 8QQ, UK
2Laboratoire d 'Electronique, ENS'EEII-IT-LEN7,
2 rue Charles Camichel, BP 7122-31071, Toulouse Cedex 7, France


Single-crystal fibres combine the material benefits of optical crystals with a waveguiding device geometry. As such they offer potentially significant advantages over conventional optical fibres in some specific fields. However, research in this area has been slow to gather momentum and to fully realise this potential. This paper reviews production methods of single-crystal fibres along with the applications which have been addressed to date along with future application areas. In addition, specific reference is made to the recent work carried out by the authors.



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