Processes involving only a single technical art, e.g. drying, coating, for which provision exists elsewhere are classified in the relevant class for that art.
This sub-class deals with the generation, amplification, modulation, demodulation or frequency-changing of phase-coherent electromagnetic waves and other forms of wave energy by using stimulated emission
H01S 1/00
Masers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of electromagnetic waves of wavelength longer than that of infra-red waves
H01S 1/02
·
solid
H01S 1/04
·
liquid
H01S 1/06
·
gaseous
H01S 3/00
Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves
H01S 3/02
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Constructional details
H01S 3/04
· ·
Cooling arrangements
H01S 3/05
·
Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium