Patents Assigned to Kailight Photonics, Inc.
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Patent number: 8885985Abstract: In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal.Type: GrantFiled: August 29, 2012Date of Patent: November 11, 2014Assignee: Kailight Photonics, Inc.Inventors: Er'el Granot, Shalva Ben-Ezra, Gil Blecher, Shai Tzadok, Reuven Zaibel, Roni Dadon, Motti Caspi, Haim Chayet, Yehuda Ganz, Arieh Sher
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Publication number: 20120321298Abstract: In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal.Type: ApplicationFiled: August 29, 2012Publication date: December 20, 2012Applicant: Kailight Photonics, Inc.Inventors: Er'el Granot, Shalva Ben-Ezra, Gil Blecher, Shai Tzadok, Reuven Zaibel, Roni Dadon, Motti Caspi, Haim Chayet, Yehuda Ganz, Arieh Sher
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Patent number: 8260092Abstract: In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal.Type: GrantFiled: February 21, 2011Date of Patent: September 4, 2012Assignee: Kailight Photonics, Inc.Inventors: Er'el Granot, Shalva Ben-Ezra, Gil Blecher, Shai Tzadok, Reuven Zaibel, Roni Dadon, Motti Caspi, Haim Chayet, Yehuda Ganz, Arieh Sher
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Patent number: 8229254Abstract: In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal.Type: GrantFiled: November 14, 2008Date of Patent: July 24, 2012Assignee: Kailight Photonics, Inc.Inventors: Er'el Granot, Shalva Ben-Ezra, Gil Blecher, Shai Tzadok, Reuven Zaibel, Roni Dadon, Motti Caspi, Haim Chayet, Yehuda Ganz, Arieh Sher
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Patent number: 8195012Abstract: In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal.Type: GrantFiled: November 14, 2008Date of Patent: June 5, 2012Assignee: Kailight Photonics, Inc.Inventors: Er'el Granot, Shalva Ben-Ezra, Gil Blecher, Shai Tzadok, Reuven Zaibel, Roni Dadon, Motti Caspi, Haim Chayet, Yehuda Ganz, Arieh Sher
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Patent number: 7907798Abstract: In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal.Type: GrantFiled: November 17, 2008Date of Patent: March 15, 2011Assignee: Kailight Photonics, Inc.Inventors: Er'el Granot, Shalva Ben-Ezra, Gil Blecher, Shai Tzadok, Reuven Zaibel, Roni Dadon, Motti Caspi, Haim Chayet, Yehuda Ganz, Arieh Sher
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Publication number: 20090080883Abstract: In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal.Type: ApplicationFiled: November 17, 2008Publication date: March 26, 2009Applicant: Kailight Photonics, Inc.Inventors: Er'el Granot, Shalva Ben-Ezra, Gil Blecher, Shai Tzadok, Reuven Zaibel, Roni Dadon, Motti Caspi, Haim Chayet, Yehuda Ganz, Arieh Sher
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Publication number: 20090073560Abstract: In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal.Type: ApplicationFiled: November 14, 2008Publication date: March 19, 2009Applicant: Kailight Photonics, Inc.Inventors: Er'el Granot, Shalva Ben-Ezra, Gil Blecher, Shai Tzadok, Reuven Zaibel, Roni Dadon, Motti Caspi, Haim Chayet, Yehuda Ganz, Arieh Sher
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Publication number: 20090073561Abstract: In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal.Type: ApplicationFiled: November 14, 2008Publication date: March 19, 2009Applicant: Kailight Photonics, Inc.Inventors: Er'el Granot, Shalva Ben-Ezra, Gil Blecher, Shai Tzadok, Reuven Zaibel, Roni Dadon, Motti Caspi, Haim Chayet, Yehuda Ganz, Arieh Sher
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Patent number: 7454092Abstract: In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal.Type: GrantFiled: October 24, 2006Date of Patent: November 18, 2008Assignee: Kailight Photonics, Inc.Inventors: Er'el Granot, Shalva Ben-Ezra, Gil Blecher, Shai Tzadok, Reuven Zaibel, Roni Dadon, Motti Caspi, Haim Chayet, Yehuda Ganz, Arieh Sher
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Publication number: 20080100846Abstract: System and methods for all-optical signal regeneration based on free space optics are described. In one exemplary embodiment, a method for regenerating an optical signal comprises counter-propagating an input signal and a regenerating signal within an all-optical signal regenerator based on free space optics, where the all-optical signal regenerator based on free space optics comprises a Sagnac loop interferometer, and extracting a regenerated output signal from the Sagnac loop interferometer. In another exemplary embodiment, an all-optical signal regenerator based on free space optics comprises a Sagnac loop interferometer, an optical signal input path coupled to a semiconductor optical amplifier of the Sagnac loop interferometer, a regenerating optical signal path coupled to the semiconductor optical amplifier of the Sagnac loop interferometer, and a regenerated optical output path coupled to the Sagnac loop interferometer.Type: ApplicationFiled: October 26, 2006Publication date: May 1, 2008Applicant: Kailight Photonics, Inc.Inventors: Sagie Tsadka, Niv Narkiss, Haim Chayet, Shalva Ben-Ezra, Er'el Granot, Reuven Zaibel, Arieh Sher, Shai Tzadok, Nir Shachar
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Publication number: 20080095487Abstract: In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal.Type: ApplicationFiled: October 24, 2006Publication date: April 24, 2008Applicant: Kailight Photonics, Inc.Inventors: Er'el Granot, Shalva Ben-Ezra, Gil Blecher, Shai Tzadok, Reuven Zaibel, Roni Dadon, Motti Caspi, Haim Chayet, Yehuda Ganz, Arieh Sher
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Publication number: 20080095538Abstract: Optical transponders with reduced sensitivity to PMD and CD are described. In one embodiment, an optical transponder comprises a differential group delay (DGD) mitigator integrated within the transponder and optically coupled to an optical input port of the optical transponder, an optical receiver integrated within the optical transponder and optically coupled to the DGD mitigator and to an electrical output port of the transponder, and a multi-level transmitter integrated within the optical transponder, where the multi-level transmitter is electrically coupled to an electrical input port and optically coupled to an optical output port of the transponder.Type: ApplicationFiled: October 24, 2006Publication date: April 24, 2008Applicant: Kailight Photonics, Inc.Inventors: Er'el Granot, Roni Dadon, Motti Caspi, Reuven Zaibel, Shai Tzadok, Shalva Ben-Ezra, Yaniv Sadka, Arieh Sher, Sagie Tsadka
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Patent number: 6947206Abstract: The invention consists of a system and method for regenerating and converting optical signals. The invention provides both “2R (i.e. reamplification and reshaping) and “3R” (i.e. reamplification, reshaping, and resynchronization (or retiming)) regeneration. The components of the inventive system include a tunable continuous wave (CW) laser source, an optical circulator, an semiconductor optical amplifier (SOA), and a spectral filter that has a very sharp cutoff frequency. In alternative embodiments, the filter may be replaced with an interleaver that passes several wavelengths. A single interleaver may be used by several of the optical regenerators/converters described herein. Each regenerator uses a separate wavelength that is associated with a passband frequency of the single interleaver. During counter-propagation in the SOA, a CW signal from the CW laser is chirped by bits in an input signal. The chirped signal is then output to the filter, which blocks the original CW signal.Type: GrantFiled: July 18, 2003Date of Patent: September 20, 2005Assignee: Kailight Photonics, Inc.Inventors: Sagie Tsadka, Shalva Ben-Ezra, Haim Chayet, Nir Shachar