Laser
AssigneeAdlas GmbH & Co. KG
InventorsJorg Lawrenz-Stolz, Fedder Petersen, Dorte Wedekind
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Abstract
To produce blue light by means of a laser, pumped light is coupled into a birefringent, nonlinear crystal (5) in a variable frequency laser (1) from a laser diode pumped light source (7, 8, 9) via an input mirror (3). Due to adjustment of the inclination of the crystal (5) or with the aid of tempering means (6) for the crystal, most of the pumped light is absorbed in the crystal (5)--upon suitable polarization of the pumped light--while the rest is available for a frequency mixture of the fundamental Wave of the laser and of the pumped light. Via an output mirror (4) blue laser light with a Wavelength of e.g. 459 nm is coupled out, with a fundamental wave of e.g. 1064 nm and pumped light with a wavelength of e.g. 806 nm.
Claims9
A laser having a resonator containing only one crystal between two mirrors and having a pumped light source, wherein the improvement comprises:
- (a) said crystal is a birefringent, nonlinear crystal, for example Al.sub.3 (BO.sub.3).sub.4 or LiNbO.sub.3, and contains as a laser-active medium a material such as, for example Nd, Er, Ho, Tm;
- (b) said pumped light and said laser-active medium contained in said crystal are coordinated with the length of said crystal in such a way that said pumped light is almost but not completely absorbed;
- and
- (c) phase matching mans are provided for mixing the frequencies of the fundamental wave of the laser and of said pumped light in said crystal.
Dependencies are inferred from the claim text.