Abstract
Since the first demonstration of the dual-frequency beat-conversion technique for the generation of a high-repetition-rate trains of optical pulses,1,2 this ail optical method has been shown to be capable of generating picosecond and femtosecond pulses over a wide range of selectable repetition rates from tens of gigabits per second up to terrabits per second. The sources based on this technique are currently finding application in investigations of ultrafast transmission and switching. There is now a demand for versatile high-frequency test sources. However, in order to make the beat-frequency source attractive for such applications, problems, such as phase noise and the synchronization of the source with other intrasystem devices (such as modulators), must be addressed. An all-diode-pumped configuration is also required, operating in the important range of repetition rates from 20 to 100 GHz. Here we report a prototype compact and simple 40-80-Gbit/s source with the potential to readily expand both the upper and lower frequency ranges; this source should find application in practical configurations.
© 1995 Optical Society of America
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