Abstract: A holographic direct-view display system uses holographic integral imaging techniques that is an auto stereoscopic way to reproduce parallax and occlusion. The display is not resolution limited and is scalable to display life size images if desired. The system can be used to transmit 3D depictions of a scene at video and sub-video rates as well as other information, such as images of documents or computer generated images. The images may be captured, transmitted and displayed in real-time (or near real-time) for telepresence or stored for time-shifted display. The system combines integral holography, a pulsed laser to record the hologram at high speed and a dynamic refreshable holographic material such as a photorefractive polymer as a recording media. The system uses techniques to write, read and erase the updateable hologram that allow the holographic material, hence direct-view display to remain stationary throughout each of the processes for continuous presentation of the hologram to the audience.

Abstract: A system and method that synchronizes a spatial light modulator (SLM) with a pulsed laser to record a hologram at the repetition rate of the pulsed laser for applications including holographic displays and data storage. The color channel capability of a SLM is utilized to effectively increase the write throughput when the pulsed laser repetition rate LR exceeds the SLM's image refresh rate R. The hogels are encoded on the color channels and concatenated to form a sequence of color images such that the write throughput is equal to the repetition rate LR up to a maximum of N*R. The invention effectively extends the capability and continued viability of existing inexpensive SLMs.

Abstract: A Laser Bar Coupler With Improved Brightness of the present invention includes a laser diode array having a number of spaced-apart laser elements, or diodes, each emitting laser radiation. The typical laser diode array laser elements are rectangular in shape, and linearly spaced apart along an axis with the long dimensions of the element along the axis. A number of optical fibers, or waveguides, each having an initially rectangular cross-section are placed adjacent each laser element and sized horizontally and vertically to approximate the rectangular dimensions of the laser element. The proximity and similar sizing of the input end of the rectangular optical fiber to the laser element provides for the near total reception of the optical energy from the laser element into the fiber.

Abstract: A high performance method of performing an optical add/drop multiplexer function that is ideally suited for integration into a photonic integrated circuit (PIC).

Abstract: A method for producing photonic integrated circuits (PICs) containing Bragg gratings and other structures. The method uses a vertical geometry with multiple waveguide layers and provides for processing through the bottom of the device.

Abstract: A holographic photonic integrated circuit includes a substrate with a ridge plane, a waveguide formed in the ridge plane haing an input and an output, a hologram formed in the ridge plane at least partially through the waveguide, and a CW light source wherein an optical signal entering the input is modulated by the CW light source to create a modulated output signal.

Abstract: A planar and fiber optical grating structure fabrication apparatus uses non-precision substrate material while providing high optical precision phase mask and grating capability with dramatically reduced cost of material and production. The phase mask is a volume hologram resulting from refractive index change in the media. When apodized, the volume hologram phase mask incorporates a change in diffraction efficiency along its length, without a reduction in the average transmittance through the mask, thus providing a uniform average refractive index of the resultant grating structure along its full length. The phase mask intrinsically produces exactly two diffraction orders, is functional over a wide wavelength range without substantive interference from undesired diffraction orders while still maintaining adequate quality of the structure being inscribed.

Abstract: A planar and fiber optical grating structure fabrication apparatus uses a phase mask that intrinsically contains apodization. The phase mask is a volume hologram resulting from refractive index change in the media. The apodized volume hologram phase mask incorporates a change in diffraction efficiency along its length, without a reduction in the average transmittance through the mask, thus providing a uniform average refractive index of the resultant grating structure along its full length. The phase mask intrinsically produces exactly two diffraction orders, the zero order and the first order, and is functional over a wide wavelength range without substantive interference from undesired diffraction orders while still maintaining adequate quality of the structure being inscribed.

Abstract: A planar and fiber optical grating structure includes a phase mask that intrinsically contains apodization. The phase mask is a volume hologram resulting from refractive index change in the media. The apodized volume hologram phase mask incorporates a change in diffraction efficiency along its length without a reduction in the average transmittance through the mask, and without changing the average refractive index of the grating along the full length of the grating. The phase mask intrinsically produces exactly two diffraction orders, the zero order and the first order, and is functional over a wavelength range greater than 10 nanometers without substantive interference from undesired diffraction orders while still maintaining adequate channel isolation.