Optical device
Номер патента: CA1298112C
Опубликовано: 31-03-1992
Автор(ы): Nicholas John Doran
Принадлежит: British Telecommunications plc
Опубликовано: 31-03-1992
Автор(ы): Nicholas John Doran
Принадлежит: British Telecommunications plc
Реферат: ABSTRACT OF THE DISCLOSURE OPTICAL DEVICE An optical device is disclosed which comprises an optical waveguide formed from at least a first material having a non-linear refractive index n2 coupled to a first pair of ports of an optical coupler. An optical signal input at one of a second pair of ports of the coupler is split to provide two signals counter propagating around the waveguide loop. By selecting the coupling ratio and appropriate waveguide parameters to ensure an asymmetry in the device, it is possible to produce an intensity dependent relative phase shift between the counter propagating signals, whereby to vary the device output. Embodiments of the invention may be used to perform logic functions on, to amplify, switch or otherwise modify an input signal.
Optical devices employing an optical thresholder
Номер патента: US20020034371A1. Автор: Bruce Ferguson,David Rollins,Mark Kintis,Stephen Perkins,Eric Upton,Richard Fields,Elizabeth Kunkee,Lawrence Dembo. Владелец: TRW Inc. Дата публикации: 2002-03-21.