Title :
Novel tuneable optical filter made of a polymer and liquid crystal holographic grating on glass waveguides
Author :
Donisi, D. ; D´Alessandro, Antonio ; Asquini, Rita ; Beccherelli, Romeo ; De Sio, L. ; Caputo, Roberto ; Umeton, Cesare
Author_Institution :
Univ. of Rome "La Sapienza", Rome
Abstract :
We present the experimental findings of a novel, switchable guided wave optical filter using a holographic Bragg grating as the optic field perturbation element using an inexpensive fabrication technology. The grating consists of a novel structure, known as POLICRYPS (polymer liquid crystal polymer slices), made of polymer slices alternated with films of aligned nematic liquid crystals (NLC). Such a composite grating is used as the overlayer of a single mode optical channel waveguide, which is obtained by using K+-Na+/Ag+-Na+ double ion-exchange in BK7 glass.
Keywords :
Bragg gratings; holographic gratings; ion exchange; liquid crystal devices; liquid crystal polymers; nematic liquid crystals; optical filters; BK7 glass; POLICRYPS; double ion-exchange; glass waveguides; holographic Bragg grating; inexpensive fabrication; liquid crystal holographic grating; nematic liquid crystals; optic field perturbation element; polymer crystal holographic grating; polymer liquid crystal polymer slices; switchable guided wave optical filter; tuneable optical filter; Glass; Gratings; Holographic optical components; Liquid crystal polymers; Liquid waveguides; Optical films; Optical filters; Optical polymers; Optical waveguides; Polymer films;
Conference_Titel :
Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-0931-0
Electronic_ISBN :
978-1-4244-0931-0
DOI :
10.1109/CLEOE-IQEC.2007.4386555
