Abstract

We demonstrate a technique for fine tuning of optical delays using cascaded acousto-optic modulators to improve the delay resolution by 5 orders of magnitude compared to a 1 pm tunable laser. A 256 ns delay with <0.5  ps resolution is shown for 40 Gbits/s return-to-zero on–off keying with no added penalty.

© 2010 Optical Society of America

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