Seven-bit reconfigurable optical true time delay line based on silicon integration | Zendy

Jingya Xie | Zendy; Linjie Zhou | Zendy; Zuxiang Li | Zendy; Jinting Wang | Zendy; Jianping Chen | Zendy

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Seven-bit reconfigurable optical true time delay line based on silicon integration

Author(s) -

Jingya Xie,

Linjie Zhou,

Zuxiang Li,

Jinting Wang,

Jianping Chen

Publication year - 2014

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.022707

Subject(s) - optics , extinction ratio , interferometry , crosstalk , optical switch , silicon photonics , optical power , photonics , optical communication , physics , materials science , wavelength , laser

We design, fabricate, and characterize a 7-bit reconfigurable optical true time delay line consisting of Mach-Zehnder interferometer (MZI) switches on the silicon photonics platform. Variable optical attenuators (VOAs) are embedded to suppress the inter-symbol crosstalk caused by the finite extinction ratio of switches. The device can provide a maximum of 1.27 ns delay with a 10 ps resolution over a wide wavelength range. Eye diagram measurement of a 25 Gbps 2(51)-1 pseudo-random bit sequence (PRBS) signal reveals the power penalties only increase 0.17 dB and 0.77 dB after transmission through the shortest (reference) and the longest (1.27 ns delay) paths, respectively.

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