| Patent application number | Description | Published |
| 20080298417 | OPTICAL SPECTRAL FILTERING AND DISPERSION COMPENSATION USING SEMICONDUCTOR OPTICAL AMPLIFIERS - The invention provides a device and a method for extending the bandwidth of short wavelength and long wavelength fiber optic lengths. The invention provides for an optical transmitter package device comprising: a laser diode; and a semiconductor optical amplifier connected directly after and in close proximity to the laser diode, wherein the semiconductor optical amplifier is adapted to operate in a frequency domain such that the semiconductor optical amplifier filters and reshapes optical wavelengths from the laser diode, and wherein the semiconductor optical amplifier is biased below an amplification threshold for the semiconductor optical amplifier. The device may also comprises a feedback circuit which comprises an optical splitter, wherein the feedback circuit samples reshaped optical output from the semiconductor optical amplifier and dynamically adjusts one or both of the semiconductor optical amplifier and the laser diode. In the case of a multimode fiber, the present invention provides the additional ability to provide a controlled offset launch into the fiber and the ability to control modal noise devoid of a specialized optical connector. | 12-04-2008 |
| 20090022181 | OPTICAL SPECTRAL FILTERING AND DISPERSION CONTROL FOR WAVELENGTH MULTIPLEXED LASER SOURCES USING FIBER BRAGG GRATINGS - The embodiments of the invention provide an apparatus for optical spectral filtering and dispersion control for wavelength multiplexed laser sources using fiber Bragg gratings. More specifically, the apparatus includes a laser diode having a first end and a second end opposite the first end. The first end of the laser diode has a first semi-transparent portion; and, the second end of the laser diode has a second semi-transparent portion. The apparatus further includes an optical fiber connected to the second end of the laser diode. The optical fiber has a first end and a second end opposite the first end, wherein the first end of the optical fiber is connected to the second end of the laser diode. The laser diode comprises a laser cavity; and, the optical fiber comprises an extension of the laser cavity. Moreover, the second end of the optical fiber has a reflective surface. | 01-22-2009 |
| 20090285525 | METHOD FOR REDUCING BANDWIDTH LOSS IN DATA CENTER APPLICATIONS WITH MULTILPLE FIBER TYPE CONNECTIVITY - A communications coupling for a low bandwidth fiber optic cable and a high bandwidth fiber optic cable, includes: a guiding ferrule adapted for coupling to a surrogate fiber optic cable comprised of one of the low bandwidth fiber optic cable and the high bandwidth fiber optic cable, the guiding ferrule including at least one mounting feature for aligning the guiding ferrule with an optical axis of the surrogate cable; the guiding ferrule further including at least one guiding feature for aligning the optical axis of the surrogate fiber optic cable with an optical axis of a connecting fiber optic cable, the connecting fiber optic cable comprised of the other one of the low bandwidth fiber optic cable and the high bandwidth fiber optic cable. A method and a communications infrastructure are provided. | 11-19-2009 |
| 20110149385 | SYSTEM TO CONTROL AN OPTICAL SIGNAL - A system to control an optical signal may include a semiconductor laser diode. The system may also include an optical amplifier to receive an optical signal from the semiconductor laser diode. The optical amplifier may be configured to spectrally filter the optical signal. | 06-23-2011 |
| 20110274440 | OPTICAL SPECTRAL FILTERING AND DISPERSION COMPENSATION USING SEMICONDUCTOR OPTICAL AMPLIFIERS - The embodiments herein provide a device and a method for extending the bandwidth of short wavelength and long wavelength fiber optic lengths. The embodiments herein provide for an optical transmitter package device comprising: a laser diode; and a semiconductor optical amplifier connected directly after and in close proximity to the laser diode, wherein the semiconductor optical amplifier is adapted to operate in a frequency domain such that the semiconductor optical amplifier filters and reshapes optical wavelengths from the laser diode, and wherein the semiconductor optical amplifier is biased below an amplification threshold for the semiconductor optical amplifier. The device may also comprises a feedback circuit which comprises an optical splitter, wherein the feedback circuit samples reshaped optical output from the semiconductor optical amplifier and dynamically adjusts one or both of the semiconductor optical amplifier and the laser diode. | 11-10-2011 |
| Patent application number | Description | Published |
| 20110052200 | MULTI-MODE MULTIPLEXING USING STAGED COUPLING AND QUASI-PHASE-MATCHING - A mode-selective add/drop unit for a mode division de/multiplexing device includes an optical ADU waveguide adapted for coupling to an input optical waveguide. The optical ADU waveguide includes at least one region providing optical signal coupling between the ADU waveguide and a multi-mode waveguide; and, one or more phase matching regions for controlling a relative or absolute phase difference between an electromagnetic wave (EMW) carried in the ADU waveguide and the multi-mode waveguide. The mode-selective add/drop unit may further include a transition region connecting the coupling region and a phase matching region, wherein a shape of a transition region is governed by a polynomial function, exponential function, logarithmic function, trigonometric function or, any combination of these functions. | 03-03-2011 |
| 20110096313 | Constrained Optimization Of Lithographic Source Intensities Under Contingent Requirements - A method for illuminating a mask to project a desired image pattern into a photoactive material is described. The method includes receiving an image pattern. Determining a relationship between source pixels in a set of source pixels to desired intensities at one or more points in the image pattern is performed. Linear constraints are imposed on a set of intensity values based on one or more contingent intensity condition. The contingent intensity conditions include integer variables specifying contingent constraints. The method includes determining values of the set of intensity values in accordance with the linear constraints, using a constrained optimization algorithm. The set of intensity values represents intensities of a set of source pixels. The set of intensity values are output. Apparatus and computer readable storage media are also described. | 04-28-2011 |
| 20110231803 | Wavefront engineering of mask data for semiconductor device design - Optical wave data for a semiconductor device design is divided into regions. First wavefront engineering is performed on the wave data of each region, accounting for just the wave data of each region and not accounting for the wave data of neighboring regions of each region. The optical wave data of each region is normalized based on results of the first wavefront engineering. Second wavefront engineering is performed on the wave data of each region, based at least on the wave data of each region as has been normalized. The second wavefront engineering takes into account the wave data of each region and a guard band around each region that includes the wave data of the neighboring regions of each region. The second wavefront engineering can be sequentially performed by organizing the regions into groups, and sequentially performing the second wavefront engineering on the regions of each group in parallel. | 09-22-2011 |