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Student Lecture Series: March 1st

2/26/2019

 
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Hector Andrade
Schow Group
​Electrical Engineering

​Monolithically-Integrated Photoreceiver with Cherry-Hooper TIA in BiCMOS Technology

In this talk, we report a monolithically-integrated photoreceiver with a pseudo-differential Cherry-Hooper trans-impedance amplifier (TIA) in a 250 nm BiCMOS process. High sensitivity 50 Gbps operation is demonstrated, and the TIA architecture is analyzed. 

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Songtao Liu
Bowers Group
​Electrical Engineering

A Low-noise High-channel-count 20 GHz Passively Mode Locked Quantum Dot Laser Grown on Si

Low cost, small footprint, highly efficient and mass producible on-chip wavelength-division-multiplexing (WDM) light sources are key components in future silicon electronic and photonic integrated circuits (EPICs). We present here, for the first time, a low noise high-channel-count 20 GHz passively mode locked quantum dot laser grown on CMOS compatible on-axis (001) silicon substrate. The laser demonstrates a wide mode locking regime in the O-band. The 3 dB optical bandwidth of the comb is 6.1 nm (containing 58 lines, with 80 lines within the 10 dB bandwidth). Utilizing 64 channels, an aggregate total transmission capacity of 4.1 terabits per second is realized by employing a 32 Gbaud Nyquist four-level pulse amplitude modulation format. The demonstrated performance makes the laser a compelling on-chip WDM source for multi-terabit/s optical interconnects in future large scale silicon EPICs.
12:00 PM Friday, March 1st in Elings 1605
​
Pizza will be provided!

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