Browsing by Author "Shu, Chester"

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Compact and High-Speed Ge Franz-Keldysh I/Q Modulator Used with Kramers-Kronig Receiver
(2018-01-01)
Tong, Yeyu
;
Zhang, Qiulin
;
Wu, Xinru
;
Chow, Chi-Wai
;
Shu, Chester
We propose a compact and high-speed FQ modulator based on two germanium-on-silicon Franz-Keldysh electro-absorption modulators. We demonstrate a 4-QAM signal transmission and reconstruct the complex signal in a Kramers-Kronig receiver for future datacenter interconnect applications.
Integrated germanium-on-silicon Franz-Keldysh vector modulator used with a Kramers-Kronig receiver
(2018-09-15)
Tong, Yeyu
;
Zhang, Qiulin
;
Wu, Xinru
;
Chow, Chi-Wai
;
Shu, Chester
We propose an integrated vector modulator based on two compact and high-speed germanium-on-silicon Franz Keldysh electro-absorption modulators. The proposed vector modulator is extremely compact with a total footprint of only 1800 mu m x 200 mu m. We further experimentally demonstrate a 4-quadrature-amplitude-modulation (4-QAM) at 40 Gb/s over a 20-km standard single-mode fiber transmission. The complex signal is successfully reconstructed with a single-ended photodiode in a recently proposed Kramers-Kronig receiver for future low-cost, low-power, and low-footprint datacenter interconnect applications. The preliminary performance of the vector modulator with a 16-QAM is also investigated. (c) 2018 Optical Society of America.