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- Arvidsson, G., et al.
(författare)
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Anordning i form av koherent ljuskälla baserad på frekvenskonvertering av ljuset från lasrar : [Controllable laser light source uses two laser sources to enable frequency mixing such that three or four new wavelengths may be generated]
- 1990
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Patent (populärvet., debatt m.m.)abstract
- The present invention concerns a coherent light source based on frequency conversion of the radiation from two lasers (20, 21) by frequency mixing in optical waveguides (10; 90), which are provided in a substrate (1). The wavelengths for the two lasers (20, 21) should be such, that the phase matching condition for the optically nonlinear frequency conversion is fulfilled in the waveguide structure (10; 90). The frequency conversion is accomplished in the form of frequency mixing, frequency doubling or down conversion in frequency by parametric oscillation so that in total three or four new wavelengths can be generated. By using integrated optics technique the output radiation can be controlled in various ways, for example be switched to different output waveguides, varied in intensity or colour balance.
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| 2. |
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| 3. |
- Wide, Ann, 1962-, et al.
(författare)
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Sätt vid kloratframställning : [Method of preparing chlorate]
- 1990
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Patent (populärvet., debatt m.m.)abstract
- The invention discloses a method in the electrolytic production of alkali metal chlorate which is recovered by crystallization and separation of the crystals from a solution recycled to the electrolysis process. A given proportion of the crystals formed are separated and removed from the mother liquor after they have been in contact with the mother liquor for a shorter period of time than the remaining crystals, whereby they obtain a sulphate content which is higher than in the crystals that have been in contact with the mother liquor for a longer period of time.
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