Patent ID: 11909448
Assignee: NEC CORPORATION
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A single-fiber bi-directional optical transceiver sub-assembly comprising:
a housing;
an optical receptacle;
a transmitting-side photoelectric converter;
a receiving-side photoelectric converter;
a multiplexing/demultiplexing filter disposed on an optical path between the optical receptacle and the transmitting-side photoelectric converter and on an optical path between the optical receptacle and the receiving-side photoelectric converter;
an isolator configured to pass an optical signal outputted from the transmitting-side photoelectric converter and block an optical signal proceeding to the transmitting-side photoelectric converter;
a first collimating lens, disposed on an optical axis between the optical receptacle and the multiplexing/demultiplexing filter, disposed at a position that fits into an external size of the housing, and configured to collimate incident light on the multiplexing/demultiplexing filter; and
a second collimating lens disposed on an optical axis between the transmitting-side photoelectric converter and the multiplexing/demultiplexing filter, wherein
the first collimating lens is disposed at a position within a width along a first direction of the receiving-side photoelectric converter, the first direction being an optical axis direction of the optical receptacle,
the isolator is disposed on the optical axis between the transmitting-side photoelectric converter and the multiplexing/demultiplexing filter, and
the second collimating lens is disposed on an optical axis between the transmitting-side photoelectric converter and the isolator.