Time-lens based optical packet pulse compression and retiming

Janaina L. Areal; Hao Hu; Evarist Palushani; Anders T. Clausen; Michael S. Berger; Leif K. Oxenløwe

doi:10.1117/12.854556

4 June 2010 Time-lens based optical packet pulse compression and retiming

Janaina L. Areal, Hao Hu, Evarist Palushani, Anders T. Clausen, Michael S. Berger, Leif K. Oxenløwe

Proceedings Volume 7728, Nonlinear Optics and Applications IV; 77280T (2010) https://doi.org/10.1117/12.854556
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

This paper presents a new optical circuit that performs both pulse compression and frame synchronization and retiming. Our design aims at directly multiplexing several 10G Ethernet data packets (frames) to a high-speed OTDM link. This scheme is optically transparent and does not require clock recovery, resulting in a potentially very efficient solution. The scheme uses a time-lens, implemented through a sinusoidally driven optical phase modulation, combined with a linear dispersion element. As time-lenses are also used for pulse compression, we design the circuit also to perform pulse compression, as well. The overall design is: (1) Pulses are converted from NRZ to RZ; (2) pulses are synchronized, retimed and further compressed at the specially designed time-lens; and (3) with adequate optical delays, frames from different input interfaces are added, with a simple optical coupler, completing the OTDM signal generation. We demonstrate the effectiveness of the design by laboratory experiments.

Citation Download Citation

Janaina L. Areal, Hao Hu, Evarist Palushani, Anders T. Clausen, Michael S. Berger, and Leif K. Oxenløwe "Time-lens based optical packet pulse compression and retiming", Proc. SPIE 7728, Nonlinear Optics and Applications IV, 77280T (4 June 2010); https://doi.org/10.1117/12.854556

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