the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers (comprising a photonic bandgap structure H01S5/11; surface-emitting lasers H01S5/18)

Introduced: January 2000

Title

Titles differ between systems:

IPC: the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers

CPC: the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers (comprising a photonic bandgap structure H01S5/11; surface-emitting lasers H01S5/18)

Full Title

Full titles differ between systems:

IPC:

Semiconductor lasers > Construction or shape of the optical resonator > the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers

CPC:

Semiconductor lasers (superluminescent diodes H10H20/00) > Construction or shape of the optical resonator > the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers (comprising a photonic bandgap structure H01S5/11; surface-emitting lasers H01S5/18)

CPC subdivides this area 10x more granularly than IPC with 9 additional codes.

9 codes are CPC-only extensions.

IPC defines codes here since 2000.

Child Classifications

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H01S 5/1203 CPC only CPC only
H01S 5/1206 +3 CPC CPC only CPC only
H01S 5/1221 CPC only CPC only
H01S 5/1225 CPC only CPC only
H01S 5/1228 CPC only CPC only
H01S 5/1231 CPC only CPC only
H01S 5/1234 CPC only CPC only
H01S 5/1237 CPC only CPC only
H01S 5/124 +2 CPC CPC only CPC only
H01S 5/125 Distributed Bragg reflector [DBR] lasers since 2000 IPC+CPC Available in IPC and CPC