comprising three or more reflectors

Introduced: July 1974

Full Title

Full titles differ between systems:

IPC:

Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range > Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium > Construction or shape of optical resonators or components thereof > comprising three or more reflectors

CPC:

Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range (semiconductors lasers H01S5/00) > Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium > Construction or shape of optical resonators or components thereof > comprising three or more reflectors

CPC subdivides this area 3x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

IPC defines codes here since 1974.

Child Classifications

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H01S 3/0811 +1 CPC CPC only CPC only
H01S 3/0813 +3 CPC CPC only CPC only
H01S 3/0818 CPC only CPC only
H01S 3/082 defining a plurality of resonators, e.g. for mode selection or suppression since 1974 +1 CPC IPC+CPC Available in IPC and CPC
H01S 3/083 Ring lasers since 1974 +1 CPC IPC+CPC Available in IPC and CPC