Patent ID: 6788837
Filing Date: 2004-09-07
Classification: G02B,H04J

Abstract:
An apparatus, comprising:first, second and third optical interleavers, each of the first, second and third interleavers including: first and second multi-mode interference (MMI) coupling devices disposed in a semiconductor substrate, each of the first and second MMI coupling devices of each of the first, second and third optical interleavers including first and second inputs and first and second outputs; a first optical coupler having a first optical path length, the first output of the first MMI coupling device optically coupled to the first input of the second MMI coupling device through the first optical coupler, and a second optical coupler having a second optical path length, the second output of the first MMI coupling device optically coupled to the second input of the second MMI coupling device through the second optical coupler, wherein the first optical path length is different than the second optical path length, wherein the first output of the second MMI coupling device of the first optical interleaver is optically coupled to the first input of the first MMI coupling device of the second optical interleaver, wherein the second output of the second MMI coupling device of the first optical interleaver is optically coupled to the second input of the first MMI coupling device of the third optical interleaver.