List of Division publications with links

2011-09-01 00:00 - Reconfigurable light-driven opto-acoustic isolators in photonic crystal fibre

M. S. Kang, A. Butsch, and P. St.J. Russell, Nature Photonics, vol. 5, no. 9, pp. 549-553 (2011)

Dynamic optical isolation with all-optical switching capability is in great demand in advanced optical communications and all-optical signal processing systems. Most conventional optical isolators rely on Faraday rotation and are realized using micro/nanofabrication techniques, but it is not always straightforward to incorporate magneto-optical crystals into these compact systems. Here, we report the experimental demonstration of a reconfigurable all-optical isolator based on optical excitation of a gigahertz guided acoustic mode in a micrometre-sized photonic crystal fibre core. This device has remarkable advantages over its passive counterparts, including a large dynamic range of isolation, fast switching capability and reversibility, which provide new functionality that is useful in various types of all-optical systems. Devices based on similar physical principles could also be realized in CMOS-compatible silicon on-chip platforms.

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Optical isolation: A non-magnetic approach