Wavelength selective device and switch and method thereby

• Main Author: AUGUSTSSON, TORSTEN
• Format: Patent
• Language: English
• Published: 21.10.2001
• Edition: 7
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FREQUENCY-CHANGING; MULTIPLEX COMMUNICATION; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SELECTING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSMISSION

The present invention relates to a device for wavelength selective phase control of a signal at a predetermined wavelength ( i) in a wavelength-multiplexed optical signal, which comprises an input port (25, 105, 209,307) for inputting the wavelength-multiplexed optical signal, a splitting means (11, 101, 201, 301) for splitting the input wavelength-multiplexed optical signal into the signal at the predetermined wavelength ( i) and a signal comprising of substantially the remaining wavelengths in the multiplex, a phase control element (37, 119, 221, 315, 317) for phase control of one of the two splitted signals, a combining device (51, 103, 201, 301) for combining the splitted phase-controlled signal and the other splitted signal in order to achieve a wavelength-multiplexed wavelength selectively phase-controlled optical signal, and an output port (71, 115,213,311) for outputting the wavelength-multiplexed wavelength selectively phase-controlled optical signal. A switch comprising at least one device of said kind and a method for wavelength selective phase control are likewise comprised in the present invention.