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US 7,003,004 B2Granted
Pulsed multiple color laser system
AssigneeGeola Technologies Ltd.
InventorsAlexey Rodin, Florian Vergnes, David Brotherton-Ratcliffe
Life of this patent
Estimating the term…
Abstract
A pulsed multiple color laser system is disclosed having particular application for incorporation into a digital holographic printer for producing RGB color reflection holograms. A Nd:YLF crystal (1) in a laser cavity is excited to produce an emission at (1313) nm which is frequency converted by doubling to 656.3 nm and by tripling to 437.7 nm. In a separate cavity a similar Nd:YLF crystal (1a) is synchronously or asynchronously excited to produce an emission at 1047.1 nm (or at the related line of 1053 nm) which is frequency converted by doubling to 523.6 nm (or 526.5 m). The emissions at 437.7 nm and 656.5 nm are combined co-linearly with the emission at 523.6 nm (or 526.5 nm) to produce a single RGB pulsed laser beam.
Claims42
A master write holographic printer comprising a pulsed multiple colour laser system, said pulsed multiple colour laser system comprising:
- a first active laser element provided in a first laser cavity, said first active laser element comprising Nd:YLF and wherein said first active laser element is arranged to generate laser radiation at a first fundamental frequency;
- means for arranging the laser mode within said first laser cavity to be single longitudinal mode;
- means for frequency doubling said laser radiation at said first fundamental frequency to provide laser radiation at a first frequency doubled frequency;
- means for frequency trebling said laser radiation at said first fundamental frequency to provide laser radiation at a first frequency trebled frequency;
- a second active laser element provided in a second laser cavity separate from said first laser cavity, said second active laser element comprising Nd:YLF and wherein said second active laser element is arranged to generate laser radiation at a second fundamental frequency;
- means for frequency doubling said laser radiation at said second fundamental frequency to provide laser radiation at a second frequency doubled frequency;
- and
- means for arranging the laser mode within said second laser cavity to be single longitudinal mode.
5 more elements
A master write holographic printer comprising a pulsed multiple colour laser system, said pulsed multiple colour laser system comprising:
- a first active laser element provided in a first laser cavity, said first active laser element comprising Nd:YAG and wherein said first active laser element is arranged to generate laser radiation at a first fundamental frequency;
- means for arranging the laser mode within said first laser cavity to be single longitudinal mode;
- means for frequency doubling said laser radiation at said first fundamental frequency to provide laser radiation at a first frequency doubled frequency;
- means for frequency trebling said laser radiation at said first fundamental frequency to provide laser radiation at a first frequency trebled frequency;
- a second active laser element provided in a second laser cavity separate from said first laser cavity, said second active laser element comprising Nd:YAG and wherein said second active laser element is arranged to generate laser radiation at a second fundamental frequency;
- means for frequency doubling said laser radiation at said second fundamental frequency to provide laser radiation at a second frequency doubled frequency;
- and
- means for arranging the laser mode within said second laser cavity to be single longitudinal mode.
5 more elements
A master write holographic printer comprising a pulsed multiple colour laser system, said pulsed multiple colour laser system comprising:
- a first active laser element provided in a first laser cavity, said first active laser element selected from the group consisting of:
- (i) Nd:YAP;
- (ii) Nd:BEL;
- and (iii) Nd in a host matrix other than YLF, YAG, YAP and BEL, and wherein said first active laser element is arranged to generate laser radiation at a first fundamental frequency;
- means for arranging the laser mode within said first laser cavity to be single longitudinal mode;
- means for frequency doubling said laser radiation at said first fundamental frequency to provide laser radiation at a first frequency doubled frequency;
- means for frequency trebling said laser radiation at said first fundamental frequency to provide laser radiation at a first frequency trebled frequency;
- a second active laser element provided in a second laser cavity separate from said first laser cavity, said second active laser element selected from the group consisting of:
- (i) Nd:YAP;
- (ii) Nd:BEL;
- and (iii) Nd in a host matrix other than YLF, YAG, YAP and BEL, and wherein the second laser element is arranged to generate laser radiation at a second fundamental frequency;
- means for frequency doubling said laser radiation at said second fundamental frequency to provide laser radiation at a second frequency doubled frequency;
- and
- means for arranging the laser mode within said second laser cavity to be single longitudinal mode.
11 more elements
A hologram copying device comprising a pulsed multiple colour laser system, said pulsed multiple colour laser system comprising:
- a first active laser element provided in a first laser cavity, said first active laser element comprising Nd:YLF and wherein said first active laser element is arranged to generate laser radiation at a first fundamental frequency;
- means for arranging the laser mode within said first laser cavity to be single longitudinal mode;
- means for frequency doubling said laser radiation at said first fundamental frequency to provide laser radiation at a first frequency doubled frequency;
- means for frequency trebling said laser radiation at said first fundamental frequency to provide laser radiation at a first frequency trebled frequency;
- a second active laser element provided in a second laser cavity separate from said first laser cavity, said second active laser element comprising Nd:YLF and wherein said second active laser element is arranged to generate laser radiation at a second fundamental frequency;
- means for frequency doubling said laser radiation at said second fundamental frequency to provide laser radiation at a second frequency doubled frequency;
- and
- means for arranging the laser mode within said second laser cavity to be single longitudinal mode.
5 more elements
A hologram copying device comprising a pulsed multiple colour laser system, said pulsed multiple colour laser system comprising:
- a first active laser element provided in a first laser cavity, said first active laser element comprising Nd:YAG and wherein said first active laser element is arranged to generate laser radiation at a first fundamental frequency;
- means for arranging the laser mode within said first laser cavity to be single longitudinal mode;
- means for frequency doubling said laser radiation at said first fundamental frequency to provide laser radiation at a first frequency doubled frequency;
- means for frequency trebling said laser radiation at said first fundamental frequency to provide laser radiation at a first frequency trebled frequency;
- a second active laser element provided in a second laser cavity separate from said first laser cavity, said second active laser element comprising Nd:YAG and wherein said second active laser element is arranged to generate laser radiation at a second fundamental frequency;
- means for frequency doubling said laser radiation at said second fundamental frequency to provide laser radiation at a second frequency doubled frequency;
- and
- means for arranging the laser mode within said second laser cavity to be single longitudinal mode.
5 more elements
A hologram copying device comprising a pulsed multiple colour laser system, said pulsed multiple colour laser system comprising:
- a first active laser element provided in a first laser cavity, said first active laser element selected from the group consisting of:
- (i) Nd:YAP;
- (ii) Nd:BEL;
- and (iii) Nd in a host matrix other than YLF, YAG, YAP and BEL, and wherein said first active laser element is arranged to generate laser radiation at a first fundamental frequency;
- means for arranging the laser mode within said first laser cavity to be single longitudinal mode;
- means for frequency doubling said laser radiation at said first fundamental frequency to provide laser radiation at a first frequency doubled frequency;
- means for frequency trebling said laser radiation at said first fundamental frequency to provide laser radiation at a first frequency trebled frequency;
- a second active laser element provided in a second laser cavity separate from said first laser cavity, said second active laser element selected from the group consisting of:
- (i) Nd:YAP;
- (ii) Nd:BEL;
- and (iii) Nd in a host matrix other than YLF, YAG, YAP and BEL, and wherein the second laser element is arranged to generate laser radiation at a second fundamental frequency;
- means for frequency doubling said laser radiation at said second fundamental frequency to provide laser radiation at a second frequency doubled frequency;
- and
- means for arranging the laser mode within said second laser cavity to be single longitudinal mode.
11 more elements
Dependencies are inferred from the claim text.