Patent ID: 11966081
Assignee: CLOUD LIGHT TECHNOLOGY LIMITED
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical system, comprising:
a carrier which is a hollow tube;
an optical fiber capillary coaxially fixed to the hollow tube;
and
an optical subassembly for non-reciprocal coupling of light from a planar optical waveguide output to the optical fiber capillary, the optical subassembly comprising:
a focusing optical system located inside the hollow tube and consists of two foci with one focus operably coincident with the optical fiber capillary;
an optical isolator located inside the hollow tube and operably configured to transmit light unidirectionally between the two foci;
a light transmitting window outside the hollow tube and having a light input plane and a light exit side, the light transmitting window, on the light exit side, being supported on a side surface of the hollow tube, a single focusing lens of the focusing optical system being in contact with the light exit side of the light transmitting window;
an input boundary provided by the light input plane of the light transmitting window to align the optical subassembly with the planar optical waveguide output in which another focus of the two foci is operably coincident with the input boundary; and

wherein the optical subassembly is operably configured to provide a low transmission loss for the light travelling from the planar optical waveguide output to the optical fiber capillary.