Structure or shape of the active region; Materials used for the active region

Introduced: January 2000

Full Title

Full titles differ between systems:

IPC:

Semiconductor lasers > Structure or shape of the active region; Materials used for the active region

CPC:

Semiconductor lasers (superluminescent diodes H10H20/00) > Structure or shape of the active region; Materials used for the active region

CPC subdivides this area 3x more granularly than IPC with 6 additional codes.

6 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 2000.

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H01S 5/3004 +1 CPC CPC only CPC only
H01S 5/3013 CPC only CPC only
H01S 5/3018 CPC only CPC only
H01S 5/3022 CPC only CPC only
H01S 5/3027 +2 CPC CPC only CPC only
H01S 5/305 +6 CPC CPC only CPC only
H01S 5/32 comprising PN junctions, e.g. hetero- or double- heterostructures (H01S5/34, H01S5/36 take precedence) since 2000 +9 CPC IPC+CPC Available in IPC and CPC
H01S 5/34 comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers (H01S5/36 takes precedence) since 2000 +17 CPC IPC+CPC Available in IPC and CPC
H01S 5/36 comprising organic materials since 2006 IPC+CPC Available in IPC and CPC