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- W2116746213 abstract "Wavelength-division demultiplexers are a fundamental component needed for many proposed integrated photonic systems. By using filter banks based on microring resonators it is possible to create demultiplexers that are two orders of magnitude smaller and achieve better performance than the discrete component demultiplexers currently used. To create a filter bank out of microring resonators the resonant-frequency spacing must be controlled to within 1GHz. This is achieved by controlling the electron-dose during scanning-electron-beam lithography in order to change the average ring waveguide width on the tens of picometer scale. Using this method a second-order twenty-channel dual filter bank (80 microrings) is fabricated with a average channel spacing of 83GHz demonstrating the capability to make changes in the average ring waveguide width with an accuracy of 75pm. It is shown that any frequency errors that remain after fabrication can be corrected using thermal tuning with integrated microheaters. The amount of power needed to correct for all frequency errors in the fabricated filter banks is 0.09W, compared to the 2.4W that is needed if no attempt is made to control the frequency spacing during fabrication. Also a temperature stabilization circuit is demonstrated that can stabilize the temperature of the filters to 80mK (280MHz)." @default.
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- W2116746213 date "2008-11-01" @default.
- W2116746213 modified "2023-10-14" @default.
- W2116746213 title "Fabrication strategies for filter banks based on microring resonators" @default.
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- W2116746213 doi "https://doi.org/10.1116/1.3021389" @default.
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