Patent ID: 6139910
Filing Date: 2000-10-31
Classification: G02B

Abstract:
A method of producing a TE-TM mode splitter comprising;depositing a first layer of nickel or zinc on a lithium niobate chip to form a first strip of nickel or zinc on an area on the surface of the chip,depositing a second layer of nickel or zinc on top of a section of the first layer to form a double layer section of the first strip and a single layer section of the first strip wherein the double layer section is adjacent to the single layer section,diffusing the double layer section of the first strip into a first portion of the lithium niobate chip to form an input terminal which is a waveguide which guides random polarized light and,diffusing the single layer section of the first strip into a second portion of the lithium niobate chip to form a first branch which is a waveguide which guides ordinary polarized light,depositing a third layer of nickel on the lithium niobate chip to form a second strip with a first end wherein the first end of the second strip intersects at an angle the area on the surface of the lithium niobate chip on which the first strip was deposited,diffusing the third layer of nickel into the lithium niobate chip to form a second branch which is a waveguide which guides extraordinary polarized light.