Polarization splitter and rotator device

摘要

A polarization splitter and rotator device (500) includes an optical mode converter (501) comprising a first optical waveguide (511), wherein a core (515, 517a, 517b) of the first optical waveguide (511) is asymmetrically shaped provoking polarized light coupled into the first optical waveguide (511) to exchange its transverse magnetic mode of zeroth order (TM0) to a transverse electric mode of first order (TE0) while leaving its transverse electric mode of zeroth order (TE0) unchanged； and an output coupler (503) comprising a second optical waveguide (512) coupled to the first optical waveguide (511) and a third optical waveguide (513) adiabatically coupled to the second optical waveguide (512), the adiabatically coupling provoking the polarized light coupled from the first optical waveguide (511) into the second optical waveguide (512) to spread its power between the second optical waveguide (512) and the third optical waveguide (513) by coupling its transverse electric mode of first order (TE1) as transverse electric mode of zeroth order (TE0) into the third optical waveguide (513) and keeping its transverse electric mode of zeroth order (TE0) propagating in the second optical waveguide (512) without coupling to the third optical waveguide (513).