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Time-resolved chirp measurement for 100GBaud test systems using an ideal frequency discriminator

Watts, RT; Shi, K; Barry, LP; (2012) Time-resolved chirp measurement for 100GBaud test systems using an ideal frequency discriminator. Optics Communications , 285 (8) pp. 2039-2043. 10.1016/j.optcom.2011.12.064.

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Abstract

In this paper we present multi-channel chirp measurements of wide-band sources, using a programmable Fourier-domain optical processor (FDOP) as a near-perfect linear frequency discriminator element followed by a fast photodiode and electrical sampling oscilloscope. The electric field of a 10.7 Gbit/s phase-encoded data source and a directly modulated laser diode are simultaneously interrogated with this measurement system. The constellation diagram of the phase-encoded data source is demonstrated, and a comparison with another phase-sensitive measurement technique is performed. Additionally, an extension to this technique is demonstrated in which the time-resolved chirp of a picosecond-duration mode-locked laser diode with a 260 GHz spectral bandwidth is characterised using the FDOP and a high-bandwidth optical sampling oscilloscope. This measurement ensemble has sufficient temporal resolution to characterise random or repetitive data signals up to 100GBaud. © 2012 Elsevier B.V. All rights reserved.

Type: Article
Title: Time-resolved chirp measurement for 100GBaud test systems using an ideal frequency discriminator
DOI: 10.1016/j.optcom.2011.12.064
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/1556671
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