Abstract: A miniaturized optical circulator includes: two polarized beam splitters and a 45-degree Faraday rotator, wherein an optical signal of a first optical path is input from a common terminal and is separated into a first polarization component and a second polarization component by a first polarized beam splitter, the first polarization component passes through the 45-degree Faraday rotator, reached a second polarized beam splitter and is reflected back, and passes through the 45-degree Faraday rotator and the first polarized beam, and reached a receiving terminal; the second polarization component under goes one reflection of the first polarization beam splitter subsequent to being separated, and reaches the receiving terminal; the optical signal of a second optical path is input, passes through the second polarized beam splitter, the 45-degree Faraday rotator, and the polarized beam splitter, and is output by the common terminal.

Abstract: A transceiver with multi-wavelength coexistence is disclosed. A BOSA (bi-direction optical sub-assembly), a PCB (203) and a fiber receptacle (102) are disposed within a transceiver housing; the PCB (203) is horizontally arranged in the transceiver housing; the fiber receptacle (102) is disposed on the BOSA; the BOSA comprises multiple transmitters (0004) and multiple receivers (0003) all of which are optically coupled with the fiber receptacle (102) and electrically connected with the PCB (103); two or more BOSAs, which are stacked in parallel or perpendicular to the PCB (203), are disposed in the transceiver housing and respectively connected with an external fiber through multiple fiber receptacles (102).

Abstract: A transceiver with multi-wavelength coexistence is disclosed. A BOSA (bi-direction optical sub-assembly), a PCB (203) and a fiber receptacle (102) are disposed within a transceiver housing; the PCB (203) is horizontally arranged in the transceiver housing; the fiber receptacle (102) is disposed on the BOSA; the BOSA comprises multiple transmitters (0004) and multiple receivers (0003) all of which are optically coupled with the fiber receptacle (102) and electrically connected with the PCB (103); two or more BOSAs, which are stacked in parallel or perpendicular to the PCB (203), are disposed in the transceiver housing and respectively connected with an external fiber through multiple fiber receptacles (102).

Abstract: A miniaturized optical circulator includes: two polarized beam splitters and a 45-degree Faraday rotator (300).