| Patent Number |
Title Of Patent |
Date Issued |
| RE38809 |
Photonic variable delay devices based on optical birefringence |
October 4, 2005 |
| Optical variable delay devices for providing variable true time delay to multiple optical beams simultaneously. A ladder-structured variable delay device comprises multiple basic building blocks stacked on top of each other resembling a ladder. Each basic building block has two polarizat |
| RE38735 |
Compact programmable photonic variable delay devices |
May 17, 2005 |
| Optical variable delay devices for providing variable true time delay to multiple optical beams simultaneously. A ladder-structured variable delay device comprises multiple basic building blocks stacked on top of each other resembling a ladder. Each basic building block has two polarizat |
| 7535639 |
Optical depolarizers and DGD generators based on optical delay |
May 19, 2009 |
| Techniques and devices for depolarizing light and producing a variable differential group delays in optical signals. In one implementation, an input optical beam is split into first and second beams with orthogonal polarizations. One or two optical reflectors are then used to cause the |
| 7522785 |
Measurements of polarization-dependent loss (PDL) and degree of polarization (DOP) using optical |
April 21, 2009 |
| Devices and techniques that use a polarization controller and a feedback control to the polarization controller to systematically control the polarization of light output from the polarization controller in measuring the polarization dependent loss (PDL) of an optical device or mater |
| 7436569 |
Polarization measurement and self-calibration based on multiple tunable optical polarization rot |
October 14, 2008 |
| Devices and techniques for generating and analyzing states of polarization in light using multiple adjustable polarization rotators in various applications. |
| 7372568 |
Low cost polametric detector |
May 13, 2008 |
| Polarimeters based on transversal division of the input beam and use of different polarization elements in different polarization states to change polarizations of different portions of the input beam so that the power levels of the different portions of the input beam can be measured |
| 7343100 |
Optical communications based on optical polarization multiplexing and demultiplexing |
March 11, 2008 |
| This application describes techniques for optical multiplexing and demultiplexing in optical communication systems based on polarization multiplexing of different signal channels. |
| 7265837 |
Sensitive polarization monitoring and controlling |
September 4, 2007 |
| Techniques and devices for monitoring polarization of light using at least two polarization elements where the difference between the outputs of the two polarization elements are used to monitor a change in polarization. |
| 7265836 |
In-line optical polarimeter using free-space polarization sampling elements |
September 4, 2007 |
| This application teaches various implementations of methods and in-line polarimeters with free-space sampling elements to sample four sample beams for determining the polarization state of input light. In one exemplary implementation, a device in this application includes four optica |
| 7227686 |
Tunable PMD emulators and compensators |
June 5, 2007 |
| Tunable PMD emulators and compensators for producing different PMD profiles with an adjustable average DGD value. |
| 7218436 |
Optical instrument and measurements using multiple tunable optical polarization rotators |
May 15, 2007 |
| Devices and techniques for generating and analyzing states of polarization in light using multiple adjustable polarization rotators in various applications. |
| 7157687 |
Optical devices with folded optical path designs |
January 2, 2007 |
| Optical devices with folded optical paths to reduce size of optical devices and optical elements in the optical devices. The folded optical paths operate by manipulating optical polarization of light. Exemplary optical switches and variable optical attenuators are described. |
| 7154659 |
Optical depolarizers and DGD generators based on optical delay |
December 26, 2006 |
| Techniques and devices for depolarizing light and producing a variable differential group delays in optical signals. In one implementation, an input optical beam is split into first and second beams with orthogonal polarizations. One or two optical reflectors are then used to cause the |
| 7067795 |
Methods and systems for dynamic control of polarization of an optical signal |
June 27, 2006 |
| Techniques and systems for dynamically controlling polarization of an optical signal by using various feedback controls, and by combining both feed-forward and feedback controls. Various dynamic control algorithms for such systems and other optical systems have been disclosed. |
| 7027198 |
Generation and analysis of state of polarization using tunable optical polarization rotators |
April 11, 2006 |
| This application describes optical monitoring devices and applications in optical systems for monitoring various optical parameters of light, including the signal to noise ratio, the degree of polarization, and the differential group delay (DGD). |
| 6975454 |
Variable polarization-dependent-loss source |
December 13, 2005 |
| An optical device including a beam splitter, polarization controller, and beam combiner is described. In some embodiments, the beam splitter and beam combiner are provided in a single element. An incoming light beam is split into two beams with different polarization components. The |
| 6937798 |
Optical spectrum monitor |
August 30, 2005 |
| Devices and techniques for monitoring spectrum of light. For example, a fiber spectral monitoring device and associated technique are described for monitoring spectral information in light based on an interferometer design. |
| 6873783 |
Fiber devices with transverse-pressure-controlled squeezers |
March 29, 2005 |
| Implementations of a polarization control method and apparatus are provided. In one implementation, a device uses super-polished squeezing surfaces to apply pressure against a polyimide coated fiber thereby minimizing micro-bending effects that cause losses in the fiber. Special cont |
| 6754404 |
Transverse-pressure-controlled fiber devices |
June 22, 2004 |
| Implementations of a polarization control method and apparatus are provided. In one implementation, a device uses super-polished squeezing surfaces to apply pressure against a polyimide coated fiber thereby minimizing micro-bending effects that cause losses in the fiber. Special cont |
| 6628862 |
Thermal-induced waveguide gratings |
September 30, 2003 |
| Techniques and devices for forming a controllable thermal grating in an optical waveguide. |
| 6628850 |
Dynamic wavelength-selective grating modulator |
September 30, 2003 |
| Techniques and devices for modulating an optical signal transmitting through an optical waveguide such as a fiber and a planar waveguide by dynamically controlling an adjustable grating formed in a cladding layer of the waveguide. |
| 6594061 |
Acceleration-insensitive opto-electronic oscillators |
July 15, 2003 |
| Techniques for reducing frequency shifts in an oscillating frequency of an opto-electronic oscillator by having at least two separate optical delay elements in an optical portion of an opto-electronic feedback loop. |
| 6576886 |
Dynamic control of polarization of an optical signal |
June 10, 2003 |
| Techniques for dynamically controlling polarization of an optical signal by combining both feed-forward and feedback controls. |
| 6535328 |
Methods and devices based on brillouin selective sideband amplification |
March 18, 2003 |
| Opto-electronic devices and techniques using Brillouin scattering to select a sideband in a modulated optical carrier signal for amplification. Two lasers respectively provide a carrier signal beam and a Brillouin pump beam which are fed into an Brillouin optical medium in opposite d |
| 6476959 |
Optical pulse synthesis using brillouin selective sideband amplification |
November 5, 2002 |
| Techniques for producing optical pulses based on Brillouin selective sideband amplification by using a common modulation control signal to modulate both a signal beam to produce multiple sideband signals and a single pump beam to produce multiple pump beams. |
| 6178036 |
Opto-electronic devices and systems based on brillouin selective sideband amplification |
January 23, 2001 |
| Opto-electronic devices and techniques using Brillouin scattering to select a sideband in a modulated optical carrier signal for amplification. Two lasers respectively provide a carrier signal beam and a Brillouin pump beam which are fed into an Brillouin optical medium in opposite d |
| 5978125 |
Compact programmable photonic variable delay devices |
November 2, 1999 |
| Optical variable delay devices for providing variable true time delay to multiple optical beams simultaneously. A ladder-structured variable delay device comprises multiple basic building blocks stacked on top of each other resembling a ladder. Each basic building block has two polarizat |
| 5929430 |
Coupled opto-electronic oscillator |
July 27, 1999 |
| A coupled opto-electronic oscillator that directly couples a laser oscillation with an electronic oscillation to simultaneously achieve a stable RF oscillation at a high frequency and ultra-short optical pulsation by mode locking with a high repetition rate and stability. Single-mode |
| 5917179 |
Brillouin opto-electronic oscillators |
June 29, 1999 |
| Opto-electronic oscillators having at least one Brillouin feedback loop based on the Brillouin selective sideband amplification to provide a sufficient gain for the oscillator to start and sustain an electro-optic oscillation. Such an oscillator can generate high frequency, high spectral |
| 5796510 |
Ladder-structured photonic variable delay device |
August 18, 1998 |
| An ladder-structured variable delay device for providing variable true time delay to multiple optical beams simultaneously. The device comprises multiple basic units stacked on top of each other resembling a ladder. Each basic unit comprises a polarization sensitive corner reflector form |
| 5561726 |
Apparatus and method for connecting polarization sensitive devices |
October 1, 1996 |
| A fiber optic apparatus for controlling the polarization state of light, for connecting polarization sensitive devices, and for providing a controlled variable attenuation in a fiber optic system. The center portion of a strand of optical fiber is placed in a rotatable fiber squeezer |
