1
Jean Francois Vinchant, Monique Renaud: Y-branch digital optical switch. Alcatel, Sughrue Mion Zinn Macpeak & Seas, October 24, 1995: US05461684 (9 worldwide citation)

In a digital optical switch an input waveguide and two divergent output waveguides constitute a guide structure. A median gap between the two output waveguides constitutes a guide gap. Electrodes control the refractive indices of the two output waveguides to couple the input waveguide and one or bot ...


2
Li Xihua, Xiao Caixia, Zhou Qiang, Yang Jianyi, Jiang Xiaoqing, Wang Minghua: Lithium niobate base 1x2 asymmetrical electrode y-branching digital photoswitch. Zhejiang Univ, linfu yu, August 29, 2007: CN200710067522

This invention discloses a sort of lithium niobate group 1*2 dissymmetry electrode Y-branch digital optical switch, which included Y-branch waveguide, SiO2 cushioning layer on the waveguide, the first and second electrode extending to the front end of the Y-branch. Another Y-branch waveguide SiO2 cu ...


3
Eldada Louay, Fujita Junichiro: Normally dark y-branch digital optical switch and variable optical attenuator. E I Du Pont de Nemours &Amp Co, March 16, 2006: JP2006-072369

PROBLEM TO BE SOLVED: To enhance the security of optical communications channels in the event of an electrical power loss.SOLUTION: A normally dark Y-branch digital optical switch is equipped with an input waveguide segment 1, an output waveguide segment 2, an exhaust waveguide segment 3, a transiti ...