By E. N. Leith (auth.), E. Marom, N. A. Vainos, A. A. Friesem, J. W. Goodman, E. Rosenfeld (eds.)
The box of optics has been accelerating at an remarkable fee, due either to the large progress of the sector of fiber-optic communications, and to the development of optical fabrics and units. Throughput functions of fiber structures are accelerating quicker than Moore's legislation, the well-known development expense of silicon chip power, which has propelled that relentlessly over many years. furthermore, new optical garage suggestions push the boundaries of data density, with an ever reducing fee in line with little bit of garage. financial funding in photonics is at an all-time excessive. whilst, different fields of optics, adaptive optics for example, are bringing new services to extra classical purposes reminiscent of astronomical imaging. New lasers remain constructed, with functions in exhibit, sensing, and biomedicine following at ever-shorter periods after the preliminary discoveries. Given this heritage, the NATO Mediterranean conversation complicated study Workshop on Unconventional Optical components for info garage, Processing and Communications, held in Israel on October 19-21, 1998, got here at an opportune second within the historical past of optics. Its objective was once to evaluate the present cutting-edge and inspire cooperation within the Mediterranean area, with the intention to highlighting and adorning the prevailing power for extra improvement and innovation. The workshop integrated members from Belgium, France, Germany, Greece, Israel, Italy, Jordan, Morocco, Portugal, Romania, Russia, Switzerland, Turkey, uk and USA.
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Extra resources for Unconventional Optical Elements for Information Storage, Processing and Communications
In the holographic interferometer from Figure I, the angle between the object and reference beams is 50°. In this case, the diffraction efficiencies without and with external field are close enough justifying the hologram recording without an additional high voltage source. In the 2WM experiment, we measured the diffraction efficiency (defined as ratio between diffracted beam and object beam intensities) for a reference-to-object beam intensity ratio of - 20 (at the crystal) and a laser light intensity of 300 mW/cm 2 • Diffraction efficiency was compared for a diode laser (5 mW; A = 660 nm) and He-Ne lasers (A = 633 nm) at two intensities.
Using DSROP in the Fourier domain, the phase distribution reconstructed from Figure 2(a) takes the form presented in Figure 2(b). An image-processing algorithm can find automatically the gradient direction with an error of less than 10 and the prism 55 angle with errors of I% in a range from several arc seconds to tenths of degrees. 5 and several hundreds meters). (a) (b) Figure 2. (a) Holographic interferogram of a test wedge. (b) The corresponding phase map obtained by DSROP Figure 3(a) presents a holographic interferogram, which is obtained with a complex phase object.
Unconventional Optical Elements for Information Storage. Processing and Communications. 51-60. © 2000 Kluwer Academic Publishers. 52 studied real time HI in BTO using 4WM and 2WM , Dainty and Troth studied - HI using anisotropic self-diffiaction in BSO , Magnusson et al. - researched HI in lithium niobate crystals with applications in optical testing , Dirksen and v. Ballyreal-time HI in sillenites , and Georges and Lemaire - phase shifting real-time HI in BSO . Some quantitative results in optical testing of simple phase objects by 4WM with photorefractive crystals were also obtained [6-11].
Unconventional Optical Elements for Information Storage, Processing and Communications by E. N. Leith (auth.), E. Marom, N. A. Vainos, A. A. Friesem, J. W. Goodman, E. Rosenfeld (eds.)