Abstract
We propose a new type of all-fiber device for inter-band router using a novel hybrid waveguide-MEMS technology. Both continuous and discrete band-routing functions are realized by precise twist control over the fused coupling region, which results in pi phase shift between the output ports. Experimentally we demonstrate inter-band routing functions between O and C-band as well as between E and L-band with a low insertion loss, wide bandwidth of operation, high channel isolation and fast response.
Highlights
As optical communication bands for wavelength division multiplexing (WDM) systems continues to extend in silica optical fibers, various technologies are being developed to fully utilize the optical bandwidth
Analogous technologies are being applied to transmission bands from 1200nm to 1700nm including original band (O-band), extended band (E-band), short wavelength band (S-band), long wavelength band (L-band), and ultra-long wavelength band (U-band), whose individual bandwidths are over 30nm [1]
Mechanical tuning of fused taper coupler has been attempted to adjust the peak transmission position and power splitting ratio [7] and recently the authors have experimentally demonstrated a 2×2 cross connect switch using a mechanically tunable fiber fused coupler that can be applied to inter-band routing between 1.3 μm Gigabit Ethernet signal and 1.5 μm conventional band (C-band) WDM signals [8]
Summary
As optical communication bands for wavelength division multiplexing (WDM) systems continues to extend in silica optical fibers, various technologies are being developed to fully utilize the optical bandwidth. Giga-bit Ethernet systems are being actively developed for LAN and WAN applications using optical signals in 0.8, and 1.3μm [3] As these techniques further develop, wavelength selective routing and switching systems will be in great demand to control data traffic with a high compatibility. Fluid containing planar light wave circuits have demonstrated similar switching performances using total internal reflection in the fluid droplets [5] These switches, are based on free-space beam steering within optical interconnects, which are sensitive to wavelength separation among optical signals as well as environmental perturbations. Operation details and device characteristics are described for the devices
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