Optical filtering characteristic of potassium Faraday opticalfilter

摘要

An ultra-narrow bandwidth potassium Faraday anomalous dispersionnoptical filter (FADOF) at the D2 line is studiedntheoretically and experimentally. The effect of temperature on thencharacteristics of the potassium Faraday filter is discussed and thentransmission versus temperature is given. Our research results show thatnthe transmission of the K-FADOF reaches nearly 90% with a bandwidth ofnonly 1.5 GHz. To meet different requirements, K-FADOF can operate atnline-center or in the line-wing by changing the working parameters