Patent ID: 8773750
Filing Date: 2014-07-08
Classification: G02B,G02F

Abstract:
1. A KBBF family nonlinear optical crystal-prism coupler, comprising: a KBBF family crystal with two smooth surfaces; transition layers each of which is deposited on respective one of the two smooth surfaces of the KBBF family crystal; and two prisms each of which optically contacts with respective one of the activated transition layers, wherein the transition layers are in thickness of 200 nm-1000 nm, and the materials of the transition layers and the prisms can be identical or different; the smooth surfaces of the KBBF family crystal are crystallographic c-plane; each of the smooth surfaces of the KBBF family crystal has a roughness of Ra less than 0.5 nm and a surface flatness less than ⅛ λ (λ=632.8 nm); and the KBBF family crystal is a single KBBF family crystal or a combination of several layers of KBBF family crystals, which are combined by optical contact through the transition layers, the transition layers are coatings of different materials from that of the KBBF family crystal.