The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 2009
Filed:
Sep. 02, 2004
Leon A. Newman, Glastonbury, CT (US);
John Kennedy, Granby, CT (US);
Joel Fontanella, Tolland, CT (US);
Phillip J. Gardner, West Hartford, CT (US);
Leon A. Newman, Glastonbury, CT (US);
John Kennedy, Granby, CT (US);
Joel Fontanella, Tolland, CT (US);
Phillip J. Gardner, West Hartford, CT (US);
Coherent, Inc., Santa Clara, CA (US);
Abstract
The quality of pulses output from laser systems such as super-pulsed COslab lasers can be improved using half-wavelength electro-optic modulators (EOMs), in combination with thin film polarizers (TFPs). A voltage applied across a CdTe crystal of the EOM rotates the polarization of a pulse passing through the EOM by 90°. The polarization determines whether the pulse passes through, or is redirected by, the TFP. The voltage applied to the crystal can be pulsed to prevent a drop in charge, which could allow radiation to leak to the application. A totem pole switch used to apply voltage to the EOM can receive a pulsed voltage for improved performance. Directing by the EOM allows pulses to be clipped at the front/back end(s), split into portions, and/or directed to separate scanners. Directing pulses or pulse portions to different scanners can increase the output of systems such as hole drilling systems.