Apparatus for optical measurements on low-index non-solid materials based on arrow waveguides

摘要: An optical waveguide is constructed so as to comprise a non-solid core layer surrounded by solid-state material. The has an index of refraction which lower than the surrounding material, and light can be transmitted with low loss through layer. In exemplary application, comprises sample material whose transmission, absorption, and/or interference characteristics are measured. addition, perpendicular portion may included for use in injecting into measuring fluorescence associated Most preferably, generally structured anti-resonant reflecting (ARROW), Fabry-Perot reflector adjacent layer, whereby substantially prevented from leaking out said transverse direction.