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CMOS Silicon Receiver Integrated With Ge Detector and Reconfigurable Optical Filter

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7 Author(s)
Rasras, M.S. ; Alcatel-Lucent/Bell Labs., Murray Hill, NJ, USA ; Gill, D.M. ; Earnshaw, M.P. ; Doerr, C.R.
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We demonstrate a complimentary metal-oxide-semiconductor (CMOS)-compatible and widely tunable filter with an integrated germanium detector. The filter uses two stages of sixth-order pole-zero filtering cascaded in a vernier fashion to achieve simultaneous tunability and adjustable passband bandwidth from 25 to 50 GHz tuned over a wavelength range >12 nm. The out-of-band crosstalk rejection is ~ 30 dB. The monolithically integrated detector has a bandwidth of 6 GHz. We also demonstrate a modified detector design which showed a bandwidth of 11 GHz/s and responsivity of 0.75 A/W.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 2 )