Tunable Optical Filter and Method of Manufacture Thereof

摘要

A tunable optical filter is formed in the structure of an etalon. A thin electro-optic ceramic substrate is fixed between two end substrates. Each end substrate has an inner parallel surface toward said electro-optic ceramic substrate covered by an electrode layer and a reflecting layer. An adhesive which attaches the electro-optic ceramic substrate to each first and second end substrates has a consistency so as to avoid stress on the electro-optic ceramic substrate. A voltage imposed on the electro-optic ceramic substrate by the electrode layers on the inner parallel surfaces of the first and second end substrates effectively controls an optical distance between the reflective coating layers on the inner parallel surfaces of the first and second end substrates of the etalon structure. The electro-optic ceramic substrate is preferably PMN-PT ((1-x)Pb (Mg⅓ Nb⅔) O3−x—Pb Ti O3) and no more than 160 μm thick.

主权项

1. A tunable optical filter comprising:
first and second end substrates, each end substrate having an inner parallel surface arranged toward each other, said inner parallel surface covered by an electrode layer and a reflecting layer; and an electro-optic ceramic substrate having first and second parallel surfaces arranged between said first and second end substrates, said electro-optic ceramic substrate no more than 160 μm thick; whereby a voltage imposed on said electro-optic ceramic substrate by said electrode layers on said inner parallel surfaces of said first and second end substrates effectively controls an optical distance between said reflecting layers on said inner parallel surfaces of said first and second end substrates.