Patents by Inventor Vincent Issier
Vincent Issier has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7957438Abstract: A method for monitoring laser light launched into a core of a single mode fiber includes launching a portion of light directly into the cladding about the core. The cladding launched light is a known fraction of the core launched light and can be monitored by placing a detector about the cladding. Detected light including light that was launched into the cladding and has leaked through the cladding is used as a known fraction of light in the core and can be used to control the laser light source. This can be done with a straight section of single mode optical fiber and does not require bending the fiber. Advantageously, most of the core launched light remains in the core as guided light.Type: GrantFiled: December 16, 2008Date of Patent: June 7, 2011Assignee: JDS Uniphase CorporationInventors: David Simons, Boris Kharlamov, James Wong, Vincent Issier, Andy Miller, James Nunley
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Patent number: 7907656Abstract: A harmonic frequency conversion module is disclosed including a polarization maintaining (PM) fiber optical link for providing an output stabilized from power fluctuation by the inclusion of one or more polarizers in the PM fiber optical link. Removing polarization distortions removes noise which has a significant negative effect on the output of harmonic frequency conversion elements. It has been found that the noise in frequency converted light has additional components, caused by mode interaction during conversion. In accordance with the present invention, we are able to remove the spikes in this noise, making it more stable and less dependent on external conditions. If the PM optical fiber route consists of multiple elements creating polarization distortions, a polarizer should be inserted between the most distorting element and the output of the fiber system. If many elements contribute to polarization distortions, several polarizers can be inserted into the system.Type: GrantFiled: November 26, 2007Date of Patent: March 15, 2011Assignee: JDS Uniphase CorporationInventors: Boris Kharlamov, Vincent Issier, Andy Miller
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Patent number: 7826502Abstract: A method and circuit is disclosed for a laser system wherein the power of the laser signal is kept at a constant near optimum value and a portion of an frequency doubled output signal is monitored and detected so that noise within the frequency doubled output signal can be minimized. A feedback signal is used to dither the temperature of a frequency doubled crystal so as to minimize the noise in the frequency doubled output signal.Type: GrantFiled: December 5, 2007Date of Patent: November 2, 2010Assignee: JDS Uniphase CorporationInventors: Haiping Lu, Vincent Issier, David Simons, Andy Miller
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Publication number: 20090154512Abstract: A method for monitoring laser light launched into a core of a single mode fiber includes launching a portion of light directly into the cladding about the core. The cladding launched light is a known fraction of the core launched light and can be monitored by placing a detector about the cladding. Detected light including light that was launched into the cladding and has leaked through the cladding is used as a known fraction of light in the core and can be used to control the laser light source. This can be done with a straight section of single mode optical fiber and does not require bending the fiber. Advantageously, most of the core launched light remains in the core as guided light.Type: ApplicationFiled: December 16, 2008Publication date: June 18, 2009Applicant: JDS UNIPHASE CORPORATION, State of Incorporation: DelawareInventors: David Simons, Boris Kharlamov, James Wong, Vincent Issier, Andy Miller, James Nunley
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Publication number: 20080144678Abstract: A method and circuit is disclosed for a laser system wherein the power of the laser signal is kept at a constant near optimum value and a portion of an frequency doubled output signal is monitored and detected so that noise within the frequency doubled output signal can be minimized. A feedback signal is used to dither the temperature of a frequency doubled crystal so as to minimize the noise in the frequency doubled output signal.Type: ApplicationFiled: December 5, 2007Publication date: June 19, 2008Applicant: JDS Uniphase CorporationInventors: Haiping Lu, Vincent Issier, David Simons, Andy Miller
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Publication number: 20080137693Abstract: A harmonic frequency conversion module is disclosed including a polarization maintaining (PM) fiber optical link for providing an output stabilized from power fluctuation by the inclusion of one or more polarizers in the PM fiber optical link. Removing polarization distortions removes noise which has a significant negative effect on the output of harmonic frequency conversion elements. It has been found that the noise in frequency converted light has additional components, caused by mode interaction during conversion. In accordance with the present invention, we are able to remove the spikes in this noise, making it more stable and less dependent on external conditions. If the PM optical fiber route consists of multiple elements creating polarization distortions, a polarizer should be inserted between the most distorting element and the output of the fiber system. If many elements contribute to polarization distortions, several polarizers can be inserted into the system.Type: ApplicationFiled: November 26, 2007Publication date: June 12, 2008Applicant: JDS Uniphase CorporationInventors: Boris Kharlamov, Vincent Issier, Andy Miller
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Patent number: 7260133Abstract: A diode-pumped laser with a direct edge coupling of a pump beam is provided. The laser includes a microchip laser cavity optically pumped by a laser diode emitting an astigmatic pump beam having a substantially elliptical beam cross-section at an output laser diode facet. The microchip laser cavity is disposed at a substantial distance exceeding 0.001? from the laser diode pump where the astigmatic pump beam has a greatly reduced ellipticity, providing high laser output efficiency without coupling lens element between the laser cavity and the laser diode pump. The pumping arrangement is favourable for single-mode lasing. In some embodiments, the laser cavity includes nonlinear crystal for intra-cavity SHG, a saturable absorber for passive Q-switching and mode locking, and a polarizing prism.Type: GrantFiled: December 15, 2004Date of Patent: August 21, 2007Assignee: JDS Uniphase CorporationInventors: Gang Lei, Charles Andy Hulse, Vincent Issier, Richard A. Bradley, Jr., Robert G. Waarts
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Publication number: 20060039436Abstract: A diode-pumped laser with a direct edge coupling of a pump beam is provided. The laser includes a microchip laser cavity optically pumped by a laser diode emitting an astigmatic pump beam having a substantially elliptical beam cross-section at an output laser diode facet. The microchip laser cavity is disposed at a substantial distance exceeding 0.001? from the laser diode pump where the astigmatic pump beam has a greatly reduced ellipticity, providing high laser output efficiency without coupling lens element between the laser cavity and the laser diode pump. The pumping arrangement is favourable for single-mode lasing. In some embodiments, the laser cavity includes nonlinear crystal for intra-cavity SHG, a saturable absorber for passive Q-switching and mode locking, and a polarizing prism.Type: ApplicationFiled: December 15, 2004Publication date: February 23, 2006Applicant: JDS Uniphase CorporationInventors: Gang Lei, Charles Hulse, Vincent Issier, Richard Bradley,, Robert Waarts