1
Andrea Castoldi: Enhanced isolation digital optical switch. Pirelli Cavi E Sistemi S p A, Finnegan Henderson Farabow Garrett & Dunner L, May 16, 2000: US06064787 (5 worldwide citation)

A digital optical switch includes an input waveguide connected to a Y-shaped branching waveguide having two legs, each of the legs being connected to an output waveguide. Each output waveguide forms one waveguide of a directional coupler, the other waveguide of which has its output dissipated into t ...


2
Castoldi Andrea: Enhanced isolation digital optical switch. Pirelli Cavi E Sistemi, February 24, 1999: EP0898197-A1 (1 worldwide citation)

A digital optical switch (100) includes an input waveguide (102) connected to a Y-shaped branching waveguide (104) having two legs, each of the legs being connected to an output waveguide (106,108). Each output waveguide (106,108) forms one waveguide of a directional coupler, the other waveguide (11 ...