Abstract: According to an aspect of the present invention, a power detector including a photodiode and a logarithmic transimpedance amplifier is mounted inside a hermetically sealed package in such a way that the photodiode and the logarithmic transimpedance amplifier are located on the same thermally conductive substrate.

Abstract: Method and apparatus for optically aligning, for subsequent assembly into discrete packages, opto-mechanical components, e.g., optical filters, and lenses for directing direct light to and from those opto-mechanical components. The apparatus comprises a light source for producing a beam of light emulating the light which exists in the assembled package of components during use, manipulator means for supporting a lens and a selected opto-mechanical component in tandem along the optical axis of the light beam and for moving the lens and selected opto-mechanical component along X and Y axes perpendicular to that optical axis, and a machine vision system having imaging means for recording images of the light beam and the opto-mechanical component and being adapted to control operation of the manipulator means so as to cause the latter to shift the lens and opto-mechanical component along the X and/or Y axes to achieve optical alignment.

Abstract: Methods and apparatus are disclosed for precision placement of an optical component on a substrate and precision assembly thereof into a fiber optic telecommunication package. An apparatus is disclosed comprising a machine vision system; contact determiner means; and a robot. A method is disclosed comprising contacting the optical component and the substrate with one another; locating the optical component relative to a fiducial point on the substrate; and moving the optical component and the substrate relative to one another toward a desired position of the optical component relative to the fiducial point on the substrate; wherein the optical component and the substrate contact one another for at least a portion of the step of moving the optical component and the substrate.

Abstract: The present invention relates to novel nicotinamide ribonucleoside kinase nucleic acids, polypeptides, and uses thereof.

Abstract: Apparatus and methods are provided for measuring a selected optical behavior of a tunable opto-electric device by using the electrical characteristics of the opto-electronic device. The benefit of the present invention is the elimination or reduction in complexity of optical wavelength reference hardware that is currently required for wavelength referencing and locking. Accordingly, the present invention reduces the cost and complexity of the optical packaging of tunable opto-electronic telecommunication components. Furthermore, the present invention also significantly simplifies optical and electronic design of system level products with tunable opto-electronic devices.

Abstract: A method and an automated apparatus for three-dimensional optical alignment of optical components for testing or assembly purposes comprise use of a visible light vision system to assist active alignment of optical components based on the measured optical output at a wavelength of light outside of the visible range.

Abstract: A method for achieving three-dimensional alignment of a pair of optical components, and apparatus for supporting such method, is initiated by fixing one of the optical components at a selected location on a semiconductor substrate. Subsequently, the other optical component and its associated submount are attached to a pair of coupled motion stages. A reference signal, to which the first optical component has been aligned, is transmitted to the other component and to a detector. That detector is positioned to measure changes in a selected characteristic of the reference signal, such as changes in optical power, as the position of the second optical component and its submount are manipulated. Through the use of a feedback loop, the second component and submount are moved in a pattern until an optimal alignment is converged upon.

Abstract: A method and an automated apparatus for three-dimensional optical alignment of optical components for testing or assembly purposes comprise use of a visible light vision system to assist active alignment of optical components based on the measured optical output at a wavelength of light outside of the visible range.