13 December 2001 Scalable micro mechanical optical crossconnects
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Abstract
Optical crossconnect switches with large port counts are the key components for the management of upcoming optical networks. Most technologies proposed for optical switches are essentially planar in geometry, which leads to switch dimensions scaling with the square of the port number. Planar technologies will not scale beyond 64 X 64 ports. To achieve larger (256 X 256, 1296 X 1296) switches, a three dimensional switch geometry is required. Micro electro-mechanical systems (MEMS) are the key technology to implement array of small two tilt axis beam steering mirrors. The presented systems consist of 2D arrays of MEMS mirrors and 2D fiber arrays each with a collimating microlens array. A cross connect path consist of light leaving one fiber and being collimated and projected onto a MEMS micro-mirror by a microlens. The first micro-mirror tilts so as to direct the beam onto a second micro-mirror, and the second micro-mirror tilts so as to direct the light towards a microlens where it is coupled into the output fiber. In this configuration the length of the switch scales linearly with number of ports, and the maximum port number is determined by used the micro mirror technology. Two switches are presented: the first with 256 port and a mean insertion loss of 7 dB and the second with 1296 ports and an insertion loss of 5.1 dB. Both switch show a crosstalk smaller than -50 dB. The optical performance has been verified with input optical signals ranging from 40 DWDM 40 Gb/s and 320 Gb/s TDM data. On the switch with 1296 ports a potential aggregate switch capacity of 2.08 Petabit/s has been demonstrated.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Roland Ryf, Roland Ryf, David T. Neilson, David T. Neilson, C. Randy Giles, C. Randy Giles, } "Scalable micro mechanical optical crossconnects", Proc. SPIE 4455, Micro- and Nano-optics for Optical Interconnection and Information Processing, (13 December 2001); doi: 10.1117/12.450424; https://doi.org/10.1117/12.450424
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