HIGHLY TUNABLE, LOW JITTER OPTICAL CLOCK GENERATION

An apparatus is disclosed for the optical generation of clock signals with tunable frequency and low jitter. A laser source serves as both the carrier used to transmit the clock signal for use by other optical, electronic or hybrid circuit elements and the original modulation time base. A fraction o...

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Bibliographische Detailangaben
Hauptverfasser:	WILLIS, JOHN, BETCHER, RUTH
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	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 NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSMISSION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	An apparatus is disclosed for the optical generation of clock signals with tunable frequency and low jitter. A laser source serves as both the carrier used to transmit the clock signal for use by other optical, electronic or hybrid circuit elements and the original modulation time base. A fraction of the original laser source undergoes one or more stages of frequency division before being recombined as a modulation signal with the remaining laser beam. Transmission of the resulting signal via single mode fiber and dividers retains the low jitter properties of the modulated signal. By starting with a clock signal of optical frequency then dividing downward in frequency, comparatively high frequency clocks may be generated, notably in the GigaHertz and TeraHertz frequency ranges.