This paper presents a high-resolution (13.2 GHz) channel-blocking optical filter, suitable for use as a reconfigurable optical add/drop multiplexer (ROADM), which seamlessly supports data rates from 2.5 to 160 Gb/s. The filter consists of a linear array of 64 MEMS micromirrors and a high-dispersion echelle grating. The demonstrated device had an insertion loss of 9 dB, a loss ripple of 1.2 dB, and a group delay ripple of 15 ps. Data transmission through the device with various mixed data rate scenarios ranging from 2.5 to 160 Gb/s showed negligible penalty, except at 40 Gb/s where a maximum penalty of 1.5 dB was observed due to a phase coherence with the blocker filter ripple.
© 2005 IEEE
Roland Ryf, Yikai Su, Lothar Möller, S. Chandrasekhar, Xiang Liu, David T. Neilson, and C. Randy Giles, "Wavelength Blocking Filter With Flexible Data Rates and Channel Spacing," J. Lightwave Technol. 23, 54- (2005)