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Wavelength blocking filter with flexible data rates and channel spacing

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7 Author(s)
Ryf, R. ; Lucent Technol., Bell Labs., Holmdel, NJ, USA ; Yikai Su ; Moller, L. ; Chandrasekhar, S.
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This work 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.

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Lightwave Technology, Journal of  (Volume:23 ,  Issue: 1 )