Patent ID: 11880070
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An alignment optical circuit comprising:
plural grating couplers being on a substrate, each of the plural grating couplers having a respective grating condition different from other ones of the plural grating couplers wherein a grating interval of one of the plural grating couplers equals a grating interval of an alignment target, wherein the alignment target is a grating coupler, wherein each of the plural grating couplers has a respective grating arraying direction as the respective grating condition, the respective grating arraying direction being different from other ones of the plural grating couplers;
plural optical waveguides being respectively connected with the plural grating couplers; and
plural reflectors being respectively connected to the plural optical waveguides.