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PCE
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Search for IPC and CPC classification codes or keywords
DIFF Subgroup
H01S 3/102

by controlling the active medium, e.g. by controlling the processes or apparatus for excitation (H01S3/13 takes precedence)

Introduced: January 1985

Title

Titles differ between systems:

IPC: by controlling the active medium, e.g. by controlling the processes or apparatus for excitation

CPC: by controlling the active medium, e.g. by controlling the processes or apparatus for excitation (H01S3/13 takes precedence)

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 > Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating > by controlling the active medium, e.g. by controlling the processes or apparatus for excitation

CPC:

Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range (semiconductors lasers H01S5/00) > Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating > by controlling the active medium, e.g. by controlling the processes or apparatus for excitation (H01S3/13 takes precedence)

CPC subdivides this area 4x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

IPC defines codes here since 1985.

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