Patents by Inventor Stuart Butterworth

Stuart Butterworth 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).

  • Optically pumped semiconductor ring laser
    Patent number: 7254153
    Abstract: An optically pumped semiconductor laser includes an active ring-resonator having two or more optically pumped semiconductor (OPS) structures each including a mirror-structure and a multilayer gain-structure. The mirror-structures serve as fold mirrors for the resonator axis. An optically nonlinear crystal may be included in the ring-resonator for generating second-harmonic radiation from fundamental radiation generated in the resonator. Another optically nonlinear crystal may be provided for generating third-harmonic or fourth-harmonic radiation from the second-harmonic radiation. In one example, including a third-harmonic generating crystal, a passive ring-resonator partially coaxial with the active ring-resonator is provided for circulating second-harmonic radiation to provide resonant amplification of the second-harmonic radiation for enhancing third-harmonic conversion.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: August 7, 2007
    Assignee: Coherent, Inc.
    Inventors: Stuart Butterworth, Andrea Caprara, R. Russel Austin
  • Optically pumped semiconductor ring laser
    Publication number: 20050265421
    Abstract: An optically pumped semiconductor laser includes an active ring-resonator having two or more optically pumped semiconductor (OPS) structures each including a mirror-structure and a multilayer gain-structure. The mirror-structures serve as fold mirrors for the resonator axis. An optically nonlinear crystal may be included in the ring-resonator for generating second-harmonic radiation from fundamental radiation generated in the resonator. Another optically nonlinear crystal may be provided for generating third-harmonic or fourth-harmonic radiation from the second-harmonic radiation. In one example, including a third-harmonic generating crystal, a passive ring-resonator partially coaxial with the active ring-resonator is provided for circulating second-harmonic radiation to provide resonant amplification of the second-harmonic radiation for enhancing third-harmonic conversion.
    Type: Application
    Filed: July 29, 2005
    Publication date: December 1, 2005
    Inventors: Stuart Butterworth, Andrea Caprara, R. Austin
  • Optically pumped semiconductor ring laser
    Patent number: 6940880
    Abstract: An optically pumped semiconductor laser includes an active ring-resonator having two or more optically pumped semiconductor (OPS) structures each including a mirror-structure and a multilayer gain-structure. The mirror-structures serve as fold mirrors for the resonator axis. An optically nonlinear crystal may be included in the ring-resonator for generating second-harmonic radiation from fundamental radiation generated in the resonator. Another optically nonlinear crystal may be provided for generating third-harmonic or fourth-harmonic radiation from the second-harmonic radiation. In one example, including a third-harmonic generating crystal, a passive ring-resonator partially coaxial with the active ring-resonator is provided for circulating second-harmonic radiation to provide resonant amplification of the second-harmonic radiation for enhancing third-harmonic conversion.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: September 6, 2005
    Assignee: Coherent, Inc.
    Inventors: Stuart Butterworth, Andrea Caprara, R. Russel Austin
  • Contact-bonded optically pumped semiconductor laser structure
    Publication number: 20050190810
    Abstract: An optically pumped semiconductor (OPS) structure includes a multilayer gain-structure surmounting a mirror structure. One surface of a diamond heat spreader is attached to the mirror structure via a contact bond. The opposite surface of the heat spreader is bonded to a metal heat sink. In one example, the OPS-structure also has a diamond window contact bonded to the gain-structure.
    Type: Application
    Filed: February 27, 2004
    Publication date: September 1, 2005
    Inventors: Stuart Butterworth, Murray Reed, Dennis Fischer
  • Off-peak optical pumping of yttrium orthovanadate
    Publication number: 20050157771
    Abstract: A laser includes an Nd:YVO4 crystal end-pumped with diode-laser light having a wavelength at which the absorption coefficient for Nd:YVO4 is less than about 0.35 (35%) of the absorption coefficient at 808 nm.
    Type: Application
    Filed: March 16, 2005
    Publication date: July 21, 2005
    Inventor: Stuart Butterworth
  • Optically pumped semiconductor ring laser
    Publication number: 20040179559
    Abstract: An optically pumped semiconductor laser includes an active ring-resonator having two or more optically pumped semiconductor (OPS) structures each including a mirror-structure and a multilayer gain-structure. The mirror-structures serve as fold mirrors for the resonator axis. An optically nonlinear crystal may be included in the ring-resonator for generating second-harmonic radiation from fundamental radiation generated in the resonator. Another optically nonlinear crystal may be provided for generating third-harmonic or fourth-harmonic radiation from the second-harmonic radiation. In one example, including a third-harmonic generating crystal, a passive ring-resonator partially coaxial with the active ring-resonator is provided for circulating second-harmonic radiation to provide resonant amplification of the second-harmonic radiation for enhancing third-harmonic conversion.
    Type: Application
    Filed: March 11, 2003
    Publication date: September 16, 2004
    Inventors: Stuart Butterworth, Andrea Caprara, R. Russel Austin