Multi-function optical filter

专利名称：Multi-function optical filter

发明人：Dingel, Benjamin, c/o Comm. Res. Lab.,Min.of

Post,Izutsu, Masayuki, c/o Comm. Res.Lab.,Min.of Post

申请号：EP99300147.8申请日：19990108公开号：EP0933657A3公开日：20010307

专利附图：

摘要：A general multi-function optical filter for future smart, high density wavelengthdivision multiplexed (WDM) communication and network system applications using a

Michelson-GT interferometer (MGTI) is invented. MGTI filter is a typical Michelsoninterferometer in which one of its reflecting mirrors is replaced by Gires-Tournoisresonator (GTR). One unique feature of this device is that it can function as channelpassing, channel dropping and wide bandpass filters depending on the interferometerarm length difference. The output of these functions is available in a single port. Otherinteresting features of this element are (1) that linewidths of both channel dropping andchannel passing filters are twice as narrow compared with typical Fabry-Perot filterhaving similar parameters, (2) that visibility of the output for three functions is alwaysunity regardless of the mirror reflectance value, and (3) that bandpass filter has anexcellent, near-perfect, box-like response function. Numerical results showing thesecharacteristics are presented and other applications are discussed.

申请人：Communication Research Laboratory, Ministry of Posts andTelecommunications (Japanese Government)

地址：2-1 Nukui-Kitamachi 4-chome Koganei-shi, Tokyo JP

国籍：JP

代理机构：Smith, Norman Ian

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