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UCSB has claimed the world record for lowest propagation loss in an optical waveguide through IPhOD technology.
The upcoming issue of Optics Express includes our paper on the subject, and is already available online (click to view):
"Planar waveguides with less than 0.1 dB/m propagation loss fabricated with wafer bonding".
Jared F. Bauters, Martijn J. R. Heck, Demis D. John, Jonathon S. Barton, C. M. Bruinink, Arne Leinse, René G. Heideman, Daniel J. Blumenthal, and John E. Bowers; Optics Express (2011), Vol. 19, No. 24
Abstract: We demonstrate a wafer-bonded silica-on-silicon planar waveguide platform with record low total propagation loss of (0.045 ± 0.04) dB/m near the free space wavelength of 1580 nm. Using coherent optical frequency domain reflectometry, we characterize the group index, fiber-to-chip coupling loss, critical bend radius, and propagation loss of these waveguides. |
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