摘要:
An integrated optical transducer assembly includes a substrate and an optoelectronic array attached to the substrate. The optoelectronic array further includes a plurality of individual subunits bonded together to form a single array, with each of the subunits including a defined number of individual optoelectronic elements associated therewith. The elastomeric material maintains an original alignment between the plurality of subunits.
摘要:
A connector system for fiber optic cables employs an interface module located between the cable connector and the system component receiving the optical signals that converts the single-mode light on the cable to a mixture of modes that fill a multi-mode waveguide on the system board, thereby reducing modal noise and differential mode delay. A particular connector produces an electrical signal reflecting whether the optical connection is within specifications.
摘要:
A method and system for modulating an optical signal to encode data therein. The method comprises the steps of directing the optical signal through a filter mechanism having a passband function including a center wavelength, and modulating the center wavelength of the optical signal to establish a difference between the center wavelengths of the filter mechanism and the optical signal to represent a data value. With the preferred implementation of the invention, a transmit device is used to encode the data in the optical signal, and a receive device is provided to decode the signal. The transmit device modulates the center wavelength of the optical signal to establish a difference between the center wavelength and a predefined wavelength to encode data in the optical signal, and the transmit device then transmits the optical signal. The receive device receives the optical signal from the transmit device and processes that signal to identify the encoded data.
摘要:
A wavelength-locked loop servo-control circuit and methodology that enables real time mutual alignment of an electromagnetic signal having a peaked spectrum function including a center wavelength and a wavelength selective device implementing a peaked passband function including a center wavelength, in a system employing electromagnetic waves. The circuit comprises a mechanism for applying a dither modulation signal at a dither modulation frequency to the electromagnetic signal, and inputting the dither modulated electromagnetic signal to the wavelength selective device; a mechanism for converting a portion of the dither modulated electromagnetic signal to an electric feedback signal; a mechanism for continuously comparing the feedback signal with said dither modulation signal and generating an error signal representing a difference between a frequency characteristic of the feedback signal and a dither modulation frequency; and a mechanism for adjusting the peaked spectrum function of the electromagnetic signal according to the error signal. The center wavelength of the electromagnetic signal and the wavelength selective device center wavelength become aligned when the frequency characteristic of the feedback signal is two times the dither modulation frequency.
摘要:
A ferrule-less optical backplane connector assembly includes a substrate having at least a pair of optical guide receiving structures formed therein, the pair of optical guide receiving structures further being formed at substantially a right angle with respect to one another so as to guide a corresponding first and second optical guide into optical alignment with one another.
摘要:
A system and method for precisely controlling the wavelength selective function provided by fiber Bragg gratings in optical fiber elements. The system and method exploits a wavelength-locked loop servo-control circuit and methodology that enables real time adjustment of the grating pattern being written to said fiber optical link element by a grating writing source to thereby mutually align a center wavelength of the peaked wavelength selective function resulting from the grating pattern with a center wavelength of the optical signal transmitted over a communication channel provided by the fiber. A real-time adaptive dispersion compensation technique for optical fibers is additionally provided that exploits the wavelength-locked loop servo-control circuit. In the adaptive compensation system, a tunable Bragg grating pattern is re-written to the fiber optical link element by a grating writing source under control of the wavelength-locked loop servo-control circuit in order to mutually align a center wavelength of the peaked wavelength selective function resulting from the grating pattern with a center wavelength of an optical signal to be transmitted over the channel.
摘要:
Wavelength locked feedback loops are provided in frequency guide filters, and particularly in sliding frequency guide filters, wherein the wavelength locked feedback loop allows precise control over the location of the filter center wavelength with respect to a transmitted soliton center wavelength, compensating for factors such as the filter rolloff, signal spectral width, and changes in the transmission line properties due to temperature, microbending, aging and other effects. This approach allows the construction of very inexpensive frequency guiding filters, which can be based on low precision frequency domain filters with active compensation. These advantages make it possible to design new types of dispersion managed soliton optical transmission networks.
摘要:
A method and system for synchronizing a local optical clock with a master optical clock, wherein the local clock generates a local clock signal at a local clock wavelength, and said master clock generates a master clock signal at a master clock wavelength. The method comprises the steps of dithering the wavelengths of the local and master clock signals, and generating a control signal representing the difference between the dithered wavelengths of the local and master clock signals. That control signal is then used to synchronize the local clock with the master clock. Preferably, a wavelength-locked loop is used as a means of phase or wavelength control for the optically distributed clock signals. The wavelength-locked loop provides a technique to control the wavelength of a local optical clock source in a manner that will allow the local clock to follow variations in the wavelength of another optical signal.
摘要:
An apparatus and method for forming a staircase arrangement for the connection of optical waveguides between a card and backplane. A card having optical waveguides and electrical conductors embedded in the card has an edge ending in a staircase arrangement with optical fiber-ribbons protruding from the edge. A guidance structure is connected to the edge and contains channels to guide and align the optical fiber-ribbons. A backplane having embedded optical waveguides and electrical conductors also has an edge ending in a staircase arrangement with a guidance structure connected to the edge and tapered openings which receive and guide the optical fiber-ribbons into close proximity with the optical waveguides and forming a staircase arrangement of connected waveguides between a card and backplane.
摘要:
A set of interlocking modules supports and connects a die containing lasers, a set of precision molded lenses and a set of beam switching elements. Another embodiment of the invention is a structure for mounting a logic chip and an optical chip on a chip carrier, with the optical chip being mounted on the side of the carrier facing the system board on which the carrier is mounted, so that radiation travels in a straight path from optical sources on the optical chip into optical transmission guides on the board.