| Patent Number |
Title Of Patent |
Date Issued |
| 7574139 |
Carrier-suppressed optical time domain multiplexing |
August 11, 2009 |
| A method and an apparatus for implementing carrier suppressed data format on conventional OTDM modules is provided. Adaptive phase shifting of optical signals traversing one of the tributaries of an OTDM module is performed with feedback loop control. A tapped portion of the input ca |
| 7460298 |
Integrated optical dual amplifier |
December 2, 2008 |
| An apparatus is provided comprising a dual optical amplifier. The two optical amplifiers are integrated, in that they share at a set of optical, electrical, or opto-electrical components. The two optical amplifiers may share a pump laser. Alternatively, the optical amplifiers may sha |
| 7373087 |
Adaptive optical transponder |
May 13, 2008 |
| Systems and methods for optical communications. In one implementation, a communications device is provided. The communications device includes an Optical domain Adaptive Dispersion Compensation Module (OADCM); an Electrical domain Adaptive Distortion Compensation Module (EADCM); and a |
| 7218451 |
Integrated optical multiplexer and demultiplexer |
May 15, 2007 |
| Optical multiplexers and demultiplexers are provided. In one implementation an apparatus is provided. The apparatus includes a first laser diode pair, a second laser diode pair, a polarization rotator coupled between the first and the second laser diode pairs, and an output port. The |
| 7184620 |
3-port optical add-drop multiplexer (OADM) |
February 27, 2007 |
| A low cost compact 3-port single-channel OADM with improved optical isolation is provided in which the I/O fibers and add/drop fiber are arranged on the same side. The 3-port OADM includes a 3-fiber pigtail and an angled reflector that together eliminate the second fiber collimator-- |
| 7142086 |
Ultra broadband inductor assembly |
November 28, 2006 |
| Systems and apparatuses for providing a broadband inductor assembly. One broadband inductor assembly includes a conical coil inductor having a broad end with radius r.sub.1 and a narrow end with radius r.sub.2, the conical coil inductor also having a broad end terminal and a narrow end |
| 7127174 |
Hybrid-integrated high-speed OTDM module |
October 24, 2006 |
| A novel optical time division multiplexing (OTDM) module based on hybrid-integrated optical chips is disclosed. An integrated modulator chip generates optical RZ signal streams which are then interleaved in an integrated time-delay chip to produce an OTDM signal. The integrated modul |
| 7116480 |
Method and apparatus for optical switching |
October 3, 2006 |
| An optical switch includes a first port, a second port, a first component group, a second component group, and a switching component group. The switching component group includes a reflector, a polarization beam splitter coupled to the reflector, and a polarization switch coupled to |
| 7039271 |
Reduced element optical add-drop multiplexer |
May 2, 2006 |
| A low cost compact integrated 4-port single-channel OADM with improved optical isolation and low insertion loss is provided in which a 4-fiber pigtail includes I/O fibers and add/drop fibers, which are arranged on the same side of the multiplexer. A lens, filter and reflector are arr |
| 7039262 |
Depolarizer |
May 2, 2006 |
| An optical depolarizer includes a birefringent block, a reflector coupled to the block, a first input port for providing polarized light to the block and an output port configured to receive polarized light from the block. The depolarizer optionally includes a non-reciprocal combinat |
| 7039261 |
Etalon based compact dispersion module |
May 2, 2006 |
| Systems and methods for providing compact dispersion compensation modules. In one implementation, a dispersion compensation module includes a polarizer having a first port, a second port, and a third port. The dispersion compensation module also includes a reflection etalon and a qua |
| 7035497 |
Miniature 1.times.2 magneto-optic switch |
April 25, 2006 |
| A magneto-optical switch includes a birefringent crystal that receives a light beam, a half-wave plate pair that receives the light beam from the birefringent crystal, a Faraday rotator that receive the light beam from the half-wave plate, a prism that receives the light beam from the |
| 7034640 |
Suspended and truncated co-planar waveguide |
April 25, 2006 |
| A suspended and truncated co-planar waveguide is described. The waveguide has a substrate with a substantially flat top surface and two lateral faces. A signal conductor and two ground conductors are placed on the top surface forming a ground-signal-ground pattern along a common plane. T |
| 7027678 |
Method for controlling the frequency dependence of insertion loss in an optical assembly |
April 11, 2006 |
| A method for controlling the frequency dependence of insertion loss in an etalon-lens-fiber (ELF) optical assembly comprises defining target frequencies and insertion loss objectives therefor and adjusting the optical path length between pairs of the etalon, lens and fiber components |
| 7027135 |
Optical circuits for tunable second order PMD compensation and tunable dispersion compensation |
April 11, 2006 |
| A method and an apparatus is provided for introducing tunable second order polarization mode dispersion compensation to an optical signal without introducing any first order polarization mode dispersion into the optical signal. A method and an apparatus is also provided for tunable chrom |
| 7010230 |
Integrated high-speed multiple-rate optical-time-division-multiplexing module |
March 7, 2006 |
| A novel integrated multiple-rate optical time division multiplexing (OTDM) module is disclosed. An integrated set of modulators generates optical RZ signal streams which are then time-delayed by a set of integrated optical delay switching and combining arrays and interleaved to produce a |
| 6992823 |
Chromatic dispersion compensator |
January 31, 2006 |
| A chromatic dispersion compensator comprises a beam delay element, such as one or more Gires-Tournois etalon (GTEs); a beam director, such as a polarizing beam splitter (PBS), a prism polarizer, a dielectric polarizer or a crystal polarizer; and a polarization changer, such as one or mor |
| 6987896 |
Optical isolator |
January 17, 2006 |
| An optical isolator includes a non-reciprocal combination-device and a reflector. The non-reciprocal combination-device has a principal direction and includes a first birefringent wedge, a second birefringent wedge, and a non-reciprocal rotating element. The non-reciprocal rotating e |
| 6982831 |
Athermal birefringent optical interleavers with flat-top passbands |
January 3, 2006 |
| A spectral interleaver providing flat top spectral transmission passbands and athermal operation is disclosed. The spectral interleaver may comprise a pentagon-shaped birefringent crystal, a polarization beam splitter, and a dielectric mirror at one facet of the crystal. Prisms and p |
| 6970652 |
Auto-setting and optimization of EAM with optical line systems |
November 29, 2005 |
| According to the invention there is provided a method of controlling an optical communication system comprising an optical transmitter, an optical receiver and an optical fiber interconnecting the optical transmitter and the optical receiver, the method comprising determining the perform |
| 6957004 |
Passive connectivity of waveguides for optical components |
October 18, 2005 |
| A packaged waveguide for passive connectivity includes waveguides packaged in a ferrule. The ferrule allows the waveguides to be passively aligned to other waveguides, fibers, or optical components, such as to align a first waveguide in the ferrule with a laser diode in a BiDi. In the ex |
| 6954307 |
Four-port PM circulator |
October 11, 2005 |
| A circulator includes a polarization beam splitter, a first reflector, a first non-reciprocal device, a second non-reciprocal device, and a second reflector. The first reflector is coupled with the polarization beam splitter. The first non-reciprocal device is coupled to the first re |
| 6950972 |
Multi-purpose BER tester (MPBERT) for very high RZ and NRZ signals |
September 27, 2005 |
| A multi-purpose bit error rate tester (MPBERT) and a method of bit error rate (BER) testing of electrical and optical components and subsystems of electrical and optical communications systems is provided. The invention provides for bit error rate testing both in the optical and the elec |
| 6944009 |
Ultra broadband capacitor assembly |
September 13, 2005 |
| Systems and apparatuses for providing a broadband capacitor assembly. One broadband capacitor assembly includes a first capacitor operable to provide a first end of an operational band of frequencies within an operational band of a broadband capacitor assembly. The broadband capacito |
| 6932521 |
Optical assembly and method for fabrication thereof |
August 23, 2005 |
| An optical assembly includes a fiber optic pigtail, a sleeve in which the pigtail is housed, a collimating lens, a rod upon which is mounted an optical device and a lens sleeve in which the lens and rod are housed. Bonding lines bond the rod and lens to the lens sleeve, the pigtail to th |
| 6915061 |
Variable optical attenuator with MEMS devices |
July 5, 2005 |
| A variable optical attenuator includes a first lens, a MEMS device, a second lens, and a wedge. The first lens is configured to collimate an input light received on a first port and focus an output light on a focus point proximate to a second port. The MEMS device includes a reflection |
| 6914676 |
System and method for optical multiplexing and/or demultiplexing |
July 5, 2005 |
| Improved methods and systems for routing and aligning beams and optical elements in an optical device include a multiplexing device and/or a demultiplexing device, which includes an optical alignment element (OAE). The OAE can be configured to substantially compensate for the cumulative |
| 6900933 |
Integrated two-pump combiner for optical fiber amplifiers |
May 31, 2005 |
| An integrated optical fiber amplifier system includes a non-reciprocal combination-device and an optical fiber amplifier. The non-reciprocal combination-device includes a first birefringent wedge, a second birefringent wedge, and a non-reciprocal rotating element. The optical fiber a |
| 6895129 |
Optical circulator |
May 17, 2005 |
| An optical circulator has a first collimator; a first block of birefringent material; a first compound polarization rotator; a light angle deflector (e.g., Wollaston prism); a second compound polarization rotator; a second block of birefringent material; and a second collimator. Light fr |
| 6894266 |
Single chip ASIC and compact packaging solution for an avalanche photodiode (APD) and bias circu |
May 17, 2005 |
| A compact integrated APD device integrates the bias voltage and temperature compensation functions inside a standard 4-pin PIN package. The active components of the bias and temperature compensation circuits are integrated into a single ASIC using a high-voltage CMOS process and oper |
| 6888971 |
Multi-port circulator |
May 3, 2005 |
| An extendable four-port circulator includes a middle birefringent crystal, a first birefringent crystal, a first non-reciprocal device, a second birefringent crystal, and a second non-reciprocal device. The first non-reciprocal device is coupled to the first birefringent crystal. The |
| 6882759 |
Four-port PM circulator |
April 19, 2005 |
| A four-port circulator includes a first birefringent crystal, a structured polarization rotator, a first birefringent wedge, a second birefringent crystal, a non-reciprocal device, and a second birefringent wedge. The structured polarization rotator is coupled to the first birefringent |
| 6879746 |
Miniature 2.times.2 magneto-optic switch |
April 12, 2005 |
| A magneto-optical switch includes a first birefringent crystal configured to receive a light beam, a first half-wave compensator plate pair configured to receive split light beams from the birefringent crystal, a first Faraday rotator configured to receive the split light beams from the |
| 6873757 |
Multiple optical switches using refractive optics |
March 29, 2005 |
| A mechanical optical switch includes a port, a first lens element, a free beam path, and a beam guiding element. The port is adapted to receive a first group of optical fibers. The first lens element has an optical axis and is positioned in front of the first group of optical fibers. The |
| 6873462 |
Three-port circulator |
March 29, 2005 |
| A three-port circulator includes a non-reciprocal rotating element, a first birefringent wedge, and a second birefringent wedge. The non-reciprocal rotating element has a rotation axis and rotates the polarization of light passing through it by an predetermined angle. The first birefring |
| 6870988 |
Tap outlet collimator |
March 22, 2005 |
| This invention discloses an optical collimator that includes a built-in tap-out projection optical arrangement for projecting a portion of an incoming beam to a tap-out beam-transmission fiber. In one of the preferred embodiments, the built-in tap-out projection optical arrangement f |
| 6865017 |
Optical fiber amplifier with error correction |
March 8, 2005 |
| Methods and apparatus for amplifying a signal are provided. In one aspect, a method is provided for amplifying an optical signal using an EDFA and includes amplifying an input signal using an EDFA producing an amplified output signal; measuring a pump residual power component of the ampl |
| 6859320 |
Dispersion compensation using resonant cavities |
February 22, 2005 |
| Multi-stage, all-pass optical filters used to make low-loss, multi-channel dispersion compensation modules are disclosed. The all-pass optical filters can be ring resonators in waveguides, Gires-Tournois Interferometers (GTIs) in free space form, and the like. The coupling constants |
| 6856443 |
Method for using length dispersion in an etalon to approximate target resonant frequencies |
February 15, 2005 |
| Methods for using a length dispersion of an etalon to approximate target resonant frequencies. Length dispersion usage in the present invention includes, for example, determining the impact of a length dispersion of an etalon on resonant frequencies of the etalon and may involve, for exa |
| 6847450 |
System and method for optical multiplexing and/or demultiplexing |
January 25, 2005 |
| Improved methods and systems for routing and aligning beams and optical elements in an optical device include a multiplexing device and/or a demultiplexing device, which includes an optical alignment element (OAE). The OAE can be configured to substantially compensate for the cumulative |
| 6844932 |
System and method for optical multiplexing and/or demultiplexing |
January 18, 2005 |
| Improved methods and systems for routing and aligning beams and optical elements in an optical device include a multiplexing device and/or a demultiplexing device, which includes an optical alignment element (OAE). The OAE can be configured to substantially compensate for the cumulative |
| 6839170 |
Optical isolator |
January 4, 2005 |
| An optical system provides reflection-type isolation, and may include variable optical attenuation and/or a tap monitor. The optical system may include an optical isolator with a beam splitter such as a walk-off plate, a focusing element such as a GRIN lens, a combiner comprising two |
| 6836590 |
Optical subassembly with port configuration |
December 28, 2004 |
| An optical subassembly utilizes a core with a first, second, and third faces. The first and second faces are coupled, non-parallel, and non-co-planar for changing a path of a beam, and their intersection defines an axis. Filters are coupled to the third face. The light path traverses |
| 6836575 |
Three-port PM circular having isolation function |
December 28, 2004 |
| An optical device includes non-reciprocal combination-device and a polarizer. The non-reciprocal combination-device has a principal direction and a reverse principal direction. The non-reciprocal combination-device includes a first birefringent wedge, a second birefringent wedge, and a |
| 6819810 |
Depolarizer |
November 16, 2004 |
| An optical depolarizer includes a non-reciprocal combination-device, a birefringent block, and a reflector. The non-reciprocal combination-device has a principal direction and includes a first birefringent wedge, a second birefringent wedge, and a non-reciprocal rotating element. The |
| 6798551 |
Gires-Tournois interferometer with faraday rotators for optical signal interleaver |
September 28, 2004 |
| A GTIFR interferometer, for use in an interleaver or in a deinterleaver, wherein the GTIFR interferometer includes a Gires-Toutnois interferometer with a 45 degree Faraday rotator between the mirrors of the Gires-Tournois interferometer and further includes a 22.5 degree Faraday rotator |
| 6775435 |
Wavelength interleaver |
August 10, 2004 |
| This invention discloses an optical interleaver that includes a first collimating lens for collimating an input optical signal into collimated beams and a second collimating lens for focusing the collimated parallel beams into an output optical fiber. The interleaver further includes a |
| 6762879 |
Method and system for providing an optical circulator |
July 13, 2004 |
| In another aspect, the invention provides a closed loop optical circulator including a first crystal for splitting an input light signal into two components, a second crystal for deflecting the two components received from the first crystal in a direction if the two components have a fir |
| 6751366 |
Multi-port circulator |
June 15, 2004 |
| An extendable four-port circulator includes a middle birefringent crystal, a first birefringent crystal, a first non-reciprocal device, a second birefringent crystal, and a second non-reciprocal device. The first non-reciprocal device is coupled to the first birefringent crystal. The |
| 6747797 |
Loop optical circulator |
June 8, 2004 |
| A four-port loop optical circulator includes a first, a second, a third and a fourth optical ports for receiving optical beam therein. The circulator further includes a plurality of optical components. The optical components include a walk-off crystal for generating a vertical optical pa |
