| 摘要 |
The invention relates to an optical filter for an optical data transmission system, comprising a substrate (11); a first and a second reflective structure (21, 31, 41, 142, 201, 301), which are spaced apart from each other in such a way that they form a Fabry-Perot cavity (4), and at least one optical waveguide (12, 13) which is formed on or in the substrate (11) and by which light can be coupled into the Fabry-Perot cavity (4) or can be decoupled from the Fabry-Perot cavity. According to the invention, the Fabry-Perot cavity (4), which is formed by the first and second reflective structure (21, 31, 141, 142, 201, 301), is at least partially an open-jet cavity, wherein the waveguide (12, 13) is an integrated waveguide formed by one or more layers arranged on the substrate (1), and wherein the first and second reflective structures (21, 31, 141, 142, 201, 301) are at least partially arranged in a recess (14) of the substrate (1) or adjoin the recess (14). The invention also relates to an optical device and to a method for determining a property of a substance. |
