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DTSTAMP:20260601T193425Z
DESCRIPTION: \n\nAbstract\n\nIn this thesis\, we explore Silicon Photonics 
 (SiP) devices for optical data center interconnects (DCIs). This thesis ca
 n be divided into three parts. In the first part\, we demonstrate the desi
 gn and characterization of optical adiabatic couplers (OACs). The analytic
 al relationship between splitting ratios (SRs) and waveguide properties is
  developed. Through experiment\, OACs with SRs from 7%/93% to 50%/50% are 
 demonstrated from 1260 to 1360 nm for the fundamental transverse electric 
 (TE) mode. The variances of SRs for different wavelengths across the Origi
 nal band (O-band) are within 1.3% when the chip temperature increases from
  20°C to 50°C. To further decrease the footprint of OACs and the SR varian
 ce from 1500 nm to 1600 nm\, we propose a time-efficient method to analyze
  and design the OACs. The measured SRs of the targeted 3-dB OACs are betwe
 en 47%/53% from 1500 nm – 1600 nm with a mode-evolution region of 110 µm. 
 The same mode-evolution method presents imbalanced OACs with SRs from 8%/9
 2% to 42%/58%.\n\nThe second part of the thesis presents a CMOS-compatible
  and temperature insensitive 1×4 Conventional band (C-band) wavelength (de
 -) multiplexer. The (de-) multiplexer design is based on cascaded Mach-Zeh
 nder interferometers (MZIs). The waveguide widths of the MZI delay lines a
 re matched to decrease the overall thermo-optic coefficient (TOC). The pro
 posed device is measured from 20°C to 50°C and the measured TOC is 4.8 pm/
 °C.\n\nThe last part of the thesis demonstrates the design\, analysis\, an
 d characterization of a compact Mach-Zehnder modulator (MMZM) with meander
 ed phase shifters on the SiP platform. With a footprint of 432 x 260 µm²\,
  the MMZM has an insertion loss of 2.1 dB. Using 0.5 V bias\, the measured
  half-wave voltage and 3-dB EO BW are 6.4 V and 7.7 GHz\, respectively. Us
 ing the fabricated MMZM\, we experimentally demonstrate 53 Gbaud PAM-4 tra
 nsmission over 2 km of standard single-mode optical fiber at a bit error r
 ate (BER) below the hard-decision (HD) forward error correction BER thresh
 old of 3.8 x 10¯³ having 6.7% overhead.\n
DTSTART:20220929T180000Z
DTEND:20220929T200000Z
LOCATION:\, Room 603\, McConnell Engineering Building\, CA\, QC\, Montreal\
 , H3A 0E9\, 3480 rue University
SUMMARY:PhD defence of Deng Mao - Design and Characterization of Silicon Ph
 otonic Devices for Data-Center Optical Interconnects
URL:https://www.mcgill.ca/ece/channels/event/phd-defence-deng-mao-design-an
 d-characterization-silicon-photonic-devices-data-center-optical-342378
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