Manuscripts, Editors and Sophocles, Philoctetes

The thesis of the article may be briefly summarized as follows: Lines 671-673 in all of our ancient MSS are consistently assigned to Philoctetes. Modern editors however, following in the footsteps of nineteenth century scholars regularly assign these lines change in line assignment was made on purely subjective grounds for no reason that can be substantiated by the dramatic situation therefore, the article concludes that in the absence of any sound reasons for the alteration we should return to the readings of the major manuscripts and the earliest editions of the play

Spectral phase conjugation with cross-phase modulation compensation

Spectral phase conjugation with short pump pulses in a third-order nonlinear material is analyzed in depth. It is shown that if signal amplification is considered, the conversion efficiency can be significantly higher than previously considered, while the spectral phase conjugation operation remains accurate. A novel method of compensating for cross-phase modulation, the main parasitic effect, is also proposed. The validity of our theory and the performance of the spectral phase conjugation scheme are studied numerically

Spontaneous spectral phase conjugation for coincident frequency entanglement

Spontaneous parametric processes pumped transversely with short pulses are studied under a unified framework, which proves that such processes can efficiently generate entangled photon pairs with time anticorrelation and frequency correlation. Improvements upon previously proposed schemes can be made by the use of quasi-phase-matching, four-wave mixing, and cross-phase-modulation compensation. The use of frequency-correlated photons in the Hung-Ou-Mandel interferometer is studied

Waveform considerations in space-variant optical processors

The use of coded waveforms in space-variant optical signal processors using coordinate transformations is considered. It is shown that nonlinear transmitted coded signals must be used with such a processor and that this results in novel waveform design and system approaches for radar and communications

Real-time programmable acoustooptic synthetic aperture radar processor

The acoustooptic time-and-space integrating approach to real-time synthetic aperture radar (SAR) processing is reviewed, and novel hybrid optical/electronic techniques, which generalize the basic architecture, are described. The generalized architecture is programmable and has the ability to compensate continuously for range migration changes in the parameters of the radar/target geometry and anomalous platform motion. The new architecture is applicable to the spotlight mode of SAR, particularly for applications in which real-time onboard processing is required

Experimental characterization of an angle-multiplexed holographic memory

We demonstrate a simple angle-multiplexing holographic storage system, using a single acousto-optic deflector to achieve fast random access to the stored holograms. We used this system to store as many as 300 holograms in a 90 degree-geometry Fe:LiNbO3 crystal. To characterize the system performance, we analyzed the reconstructions in terms of the signal-to-noise ratio