SIMULTANEOUS WIDE WAVELENGTH MEASUREMENT TYPE SPECTROSCOPE USING FABRY-PEROT INTERFEROMETER

摘要

PURPOSE:To obtain a spectrum of high resolution by a simple device by sweeping two pieces of plates constituting a Fabry-Perot interferometer and bringing a signal of light which is transmitting through at that time to reverse conversion by using a specific expression. CONSTITUTION:The Fabri-Perot interferometer is constituted by only opposing two pieces of translucent plates. By denoting an interval of these two pieces of plates, the lower limit and the upper limit of (x), and a modulation component and an apodization function in transmittivity of the interferometer to the wave number (f) of light as (x), and x1, x2, and T (f, x), and A (x), respectively, and changing (x) one after another, an output signal of light for transmitting through the interferometer is generated, a variable component therein is denoted as S (x), and by using it, a spectrum of an input light is calculated by the expression givens (conversion expression). In such a way, the spectrum of high resolution can be obtained by a simple device.