Photo detection process and power spectrum estimation of optical radiation by the multichannel resonant spectrum analyzer

International Conference of Young Scientists and Specialists "Optics-2015"

Moskaletz, O.D.^1 ; Paraskun, A.S.^1 ; Vaganov, M.A.^1

St. Petersburg University of Aerospace Instrumentation, B. Morskaya 67, St. Petersburg

190000, Russia^1

关键词: Interference filters;    Lumped parameter;    Optical radiations;    Optical spectrum analyzer;    Parallel resonant;    Power spectrum estimation;    Resonant spectrum;    Spheroidal wave functions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/735/1/012060/pdf
DOI  :  10.1088/1742-6596/735/1/012060

来源: IOP

【 摘 要 】

The problem of receiving of an energy spectrum estimation of optical radiations in the new analyzer of optical signals is considered. It is the parallel resonant optical spectrum analyzer (SPECTRUM ANALYZER). Its resolving system is a set of narrow-band optical resonators in the form of interference filters. Each optical resonator is equivalent to a system with lumped parameters. This allows us to consider only oscillations of an optical field in the form of a scalar functions and adopt as a model of analyzed signal harmonized scalar random process. The photodetector operation and average of photocurrent using an integrator and integrating circuit is considered too. On the basis of the application prolate entire spheroidal wave function theory energy spectrum estimation by the integral of photocurrent is obtained. This energy spectrum estimation is consistent and asymptotically unbiased.