Low-frequency fluctuations, which are typical irregular oscillations in edge-emitting semiconductor lasers, are experimentally observed for the y-polarization mode (y is the direction along the optical axis of a laser material) in a vertical-cavity surface-emitting laser with optical feedback.

We investigate the ray dynamics in an optical cavity when a ray-splitting mechanism is present. The cavity is a conventional two-mirror stable resonator, and the ray splitting is achieved by inserting an optical beam splitter perpendicular to the cavity axis. Using Hamiltonian optics, we show that such a simple device presents surprisingly rich chaotic ray dynamics.

For optical neural networks implemented with computer-generated planar holograms the spacebandwidth product of the hologram is a major consideration. Off-axis holograms can be fabricated with a single binary transmission mask. However, the carrier frequency greatly increases the space-bandwidth product. On axis-holograms use a lower space-bandwidth product to encode interconnections but require...

A 1xN2 wavelength-selective switch is demonstrated using a high fill-factor two-axis analog micromirror array and a monolithic 2D collimator array. A 1x2 (scalable to 1x14) WSS with SO-GHz channel spacing is experimentally demonstrated. 02004 Optical Society of America OCIS rodeo: (06C.1810) Couplers, switches, and multiplexers (OM.4510) Optical communications

We provide a set of microlensing optical depth maps for M31. Optical depths towards Andromeda were calculated on the basis of a four component model of the lens and source populations: disk and bulge sources lensed by bulge, M31 halo and Galactic halo lenses. We confirm the high optical depth and the strong optical depth gradient along the M31 minor axis due to a dark halo of lenses and also di...

Multiple invariant optical correlators are considered. By multiple invariance, we mean invariance to more than one distortion parameter per axis of the processor. Space variant optical processors using coordinate transformations and a new phase detection scheme are used to realize such correlators. A theoretical analysis and experimental verification are included.

The two independent components of the gyration tensor of quartz, g(11) and g(33), have been spectroscopically measured using a transmission two-modulator generalized ellipsometer. The method is used to determine the optical activity in crystals in directions other than the optic axis, where the linear birefringence is much larger than the optical activity.

We report a demonstration of the measurement of the ratio between an optical modulation sideband component and the nonshifted light component by time-averaged heterodyne holography in off-axis and frequency-shifting configuration, through coherent frequency-division multiplexing with a dual optical local oscillator. Experimental results of sinusoidal vibration sensing are reported. This techniq...

Recent applications of femtosecond laser assisted self-assembled nanostructures will be overviewed. Specifically, polarization sensitive optical elements and 5-dimensional optical data storage with practically unlimited life-time will be demonstrated and discussed. OCIS codes: (140.7090) Ultrafast lasers; (260.6042) Singular optics; (210.0210) Optical data storage Material processing with ultra...

Optical emission spectroscopy as well time-of-flight (TOF) measurements were performed in the diagnostics of nanosecond laser produced plasmas. The target is rotated during pulsed ablation at 5 GW/cm2, where optical along, perpendicular to axis. Parallel axis, continuum radiation intensity increases up 6000 pulses, and line intensities from C I II increase for with number pulses. Perpendicular ...