H ELECTRICITY
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H01 ELECTRIC ELEMENTS
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H01S DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
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H01S3/00 Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
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H01S3/14 characterised by the material used as the active medium
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H01S3/16 Solid materials
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H01S3/163 characterised by a crystal matrix
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