For access to this article, please select a purchase option:
IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.
Your recommendation has been sent to your librarian.
The authors propose and experimentally demonstrate a polarisation-independent all-optical circulating shift register (CSR) based on self-phase modulation of a semiconductor optical amplifier, which is very insensitive to the polarisation of the input pulse train and requires very low switching energy (~176 fJ). An all-optical 91 bit CSR was constructed for an input pulse stream at 2.897 GHz, and a high extinction ratio of 20 dB or more was obtained.
Inspec keywords: photonic switching systems; self-phase modulation; semiconductor optical amplifiers; time division multiplexing; shift registers
Other keywords:
Subjects: Semiconductor lasers; Optical self-focusing and related effects; Multiplexing and switching in optical communication