US 12,422,690 B2
Optical circulator and optical module
Long Chen, Suzhou (CN); Yu-Zhou Sun, Suzhou (CN); and Li-xiang Li, Suzhou (CN)
Assigned to INNOLIGHT TECHNOLOGY (SUZHOU) LTD., Suzhou (CN)
Filed by InnoLight Technology (Suzhou) Ltd., Suzhou (CN)
Filed on Apr. 24, 2023, as Appl. No. 18/138,171.
Claims priority of application No. 202220380584.X (CN), filed on Feb. 24, 2022; and application No. 202221440964.4 (CN), filed on Jun. 10, 2022.
Prior Publication US 2023/0266598 A1, Aug. 24, 2023
Int. Cl. G02B 27/28 (2006.01); G02B 17/08 (2006.01); G02F 1/01 (2006.01); G02F 1/09 (2006.01); H04J 14/02 (2006.01)
CPC G02B 27/285 (2013.01) [G02F 1/0136 (2013.01); G02F 1/093 (2013.01); H04J 14/0307 (2023.08); G02B 17/0856 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An optical circulator, comprising:
a first polarization beam splitter member having a common optical port;
a second polarization beam splitter member having an emittance optical port and at least two receiving optical ports; and
a first polarization adjustment member located between the first polarization beam splitter member and the second polarization beam splitter member and being configured to uni-directionally adjust polarization states of light beams;
wherein the at least two receiving optical ports respectively receive two linearly polarized light beams having different polarization states, and the two linearly polarized light beams include a first linearly polarized light beam and a second linearly polarized light beam; wherein the first linearly polarized light beam and the second linearly polarized light beam respectively pass through the second polarization beam splitter member, and then sequentially pass through the first polarization adjustment member and the first polarization beam splitter member to be combined into a first combined light beam for being output from the common optical port;
wherein the common optical port is configured to receive a compound optical signal, the compound optical signal passes through the first polarization beam splitter member to be split into another two linearly polarized light beams having different polarization states, and the another two linearly polarized light beams include a third linearly polarized light beam and a fourth linearly polarized light beam; wherein the third linearly polarized light beam and the fourth linearly polarized light beam pass through the first polarization adjustment member to interchange the polarization states thereof, and then pass through the second polarization beam splitter member to be combined into a second combined light beam for being output from the emittance optical port.