Frequency-time coherence for all-optical sampling without optical pulse source.
Sampling is the first step to convert an analogue optical signal into a digital electrical signal. The latter can be further processed and analysed by well-known electrical signal processing methods. Optical pulse sources like mode-locked lasers are commonly incorporated for all-optical sampling, but have several drawbacks. A novel approach for a simple all-optical sampling is to utilise the frequency-time coherence of each signal. The method is based on only using two coupled modulators driven with an electrical sine wave. Since no optical source is required, a simple integration in appropriate platforms, such as Silicon Photonics might be possible. The presented method grants all-optical sampling with electrically tunable bandwidth, repetition rate and time shift.
Insitut für Hochfrequenztechnik, Technische Universität Braunschweig, 38106 Braunschweig, Germany.
Stefan
S
Preußler
Insitut für Hochfrequenztechnik, Technische Universität Braunschweig, 38106 Braunschweig, Germany.
Gilda
G
Raoof Mehrpoor
Insitut für Hochfrequenztechnik, Technische Universität Braunschweig, 38106 Braunschweig, Germany.
Thomas
T
Schneider
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