Chirp control of a Mach-Zehnder optical modulator using non-equal power splitting
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United States of America Patent
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Jun 4, 1996
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app pub date -
May 25, 1995
filing date -
Jan 28, 1994
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Abstract
A Mach-Zehnder optical modulator in which the chirp parameter can be varied by adjusting the optical power splitting ratio between the two arms of the interferometer. The modulating voltage is supplied to a single arm or alternatively to both arms in a push-pull configuration. For an appropriate power splitting ratio negative chirp is achieved with approximately equal push-pull modulating drive voltage. This results in optimum distance and bit rate characteristics with low drive power.
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