Methods and apparatus for depolarizing light are disclosed. A disclosed apparatus
includes a waveguide, a first microresonator and a second microresonator. The first
microresonator has a first birefringence and is evanescently coupled to the waveguide.
The second microresonator has a second birefringence different than the first birefringence
and is also evanescently coupled to the waveguide. A disclosed method includes
evanescently coupling a first portion of input light into a first microresonator,
rotating the polarization of the first portion to create a first recirculated portion,
and evanescently coupling the first recirculated portion into a waveguide. The
disclosed method further includes evanescently coupling a second portion of input
light into a second microresonator, rotating the polarization of the second portion
to create a second recirculated portion, and evanescently coupling the second recirculated
portion into the waveguide.
