Abstract: The present invention provides a hologram which forms a light intensity distribution on a predetermined plane by using incident light. The hologram includes a plurality of cells configured to control both a phase of a first polarized light component in a first polarization direction of the incident light and a phase of a second polarized light component in a second polarization direction perpendicular to the first polarization direction, to form a phase difference distribution between phase distributions for the first and second polarized light components. The plurality of cells are designed so that a number of phase difference levels of the phase difference distribution is less than a number of phase levels of the phase distribution of the first polarized light component.

Abstract: The present invention provides a hologram which forms a light intensity distribution on a predetermined plane by using incident light. The hologram includes a plurality of cells configured to control both a phase of a first polarized light component in a first polarization direction of the incident light and a phase of a second polarized light component in a second polarization direction perpendicular to the first polarization direction, to form a phase difference distribution between phase distributions for the first and second polarized light components. The plurality of cells are designed so that a number of phase difference levels of the phase difference distribution is less than a number of phase levels of the phase distribution of the first polarized light component.

Abstract: Fiber optic transmitter and receiver electrical elements are implemented on separate vertical boards in fiber optic modules. An optical block implements lenses and reflecting surfaces to minimize manufacturing costs. The light receiver and light transmitter are mounted to receive and transmit non-orthogonal to the fiber axis to avoid optical cross talk. In one embodiment, receiver and transmitter are mounted at an angle greater than forty-five degrees with a perpendicular line to the reflective surfaces. In another embodiment, receiver and transmitter are mounted at an angle less than forty-five degrees with a perpendicular line to the reflective surfaces. The reflective surface for transmission may be a beam shaper to improve light beam uniformity and optical coupling and to avoid active alignment. The vertical boards have ground planes facing each other to minimize electrical cross talk. An optional shielded housing provides further shielding for reducing EMI.

Abstract: The invention is a method and apparatus for transmitting the light from one or more transmitting arrays of optical devices to one or more receiving arrays of optical devices where each optical device in a transmitting array transmits an initially diverging light beam to a single optical device in a receiving array. Each optical device in a receiving array receives a converging light beam from a single optical device in a transmitting array. The method consists of imaging the optical devices in one or more transmitting arrays on the optical devices in one or more receiving arrays. The light rays from each optical device in a transmitting array are superimposed on the light rays from the other optical devices in the transmitting array while traversing a common volume.

Abstract: Fiber optic modules and methods of assembly of fiber optic modules. Fiber optic modules include one or more printed circuit boards arranged at a an angle with a base. The one or more printed circuit boards are parallel to optical axis of one or more optoelectronic devices such as a receiver or transmitter. The one or more printed circuit boards may include a ground plane to minimize electrical cross talk. A shielded housing or cover provides shielding for electromagnetic interference. The base or shielded housing or cover may include a septum to separate the fiber optic modules into a first side and a second side and provide additional shielding to minimize crosstalk.

Abstract: An optical pickup head for high density optical storage applications and a method of fabrication including a first order mode light source and a phase shift mask. The light source is capable of emitting a power output of at least 10 mW. The phase shift mask positioned to allow for a 180.degree. shift in light emitted therethrough, thereby creating a reduced focal spot size for high density data write applications. The optical pickup head capable of high density read and write applications for both CDs and DVDs.