Variable optical attenuator with a polymer-stabilized dual-frequency liquid crystal
نویسندگان
چکیده
منابع مشابه
Variable optical attenuator with a polymer-stabilized dual-frequency liquid crystal.
A transmission-type variable optical attenuator (VOA) based on a polymer-stabilized dual-frequency liquid crystal (PSDFLC) is demonstrated at gamma = 1.55 microm. The VOA is highly transparent in the voltage-off state but scatters light in the voltage-on state. By using a birefringent beam displacer incorporated with half-wave plates, we can obtain a VOA that is polarization independent and tha...
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A variable optical attenuator (VOA) based on polymer stabilized twisted nematic (PSTN) liquid crystal (LC) is demonstrated. Comparing with the normal twisted nematic LC-based VOA, PSTN exhibits a much faster response time. Moreover, the polymer networks effectively eliminate the backflow effect which exists in the normal TNLC cell. The attenuation mechanism of the PSTN LC was studied. Both pola...
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ژورنال
عنوان ژورنال: Applied Optics
سال: 2005
ISSN: 0003-6935,1539-4522
DOI: 10.1364/ao.44.004394