A 25 Gb/s Hybrid-Integrated Silicon Photonic Source-Synchronous Receiver With Microring Wavelength Stabilization

作者：Yu Kunzhi^*; Li Cheng; Li Hao; Titriku Alex; Shafik Ayman; Wang Binhao; Wang Zhongkai; Bai Rui; Chen Chin Hui; Fiorentino Marco; Chiang Patrick Yin; Palermo Samuel

来源：IEEE Journal of Solid-State Circuits, 2016, 51(9): 2129-2141.

DOI：10.1109/JSSC.2016.2582858

• Injection-locked oscillator
• optical interconnects
• optical receiver
• ring resonator
• silicon-photonics
• thermal tuning
• transimpedance amplifier
• WDM

Single-mode wavelength-division multiplexing (WDM) optical links are an attractive technology to meet the growing interconnect bandwidth demand in data center applications. This paper presents a multi-channel hybrid-integrated photonic receiver based on microring drop filters and waveguide photodetectors implemented in a 130 nm SOI process and high-speed optical front-ends designed in 65 nm CMOS. The source-synchronous receiver utilizes an LC injection-locked oscillator (ILO) in the clock path for improved jitter filtering, while maintaining correlated jitter tracking with the data channels. Receiver sensitivity is improved with a large input-stage feedback resistor transimpedance amplifier (TIA) cascaded with an adaptively-tuned continuous-time linear equalizer (CTLE). In order to stabilize the microring drop filter resonance wavelength, a peak-detector-based thermal tuning loop is implemented with a 0.7 nm range at 43 mu W/GHz efficiency. When tested with a waveguide photodetector with 0.45 A/W responsivity, the receiver achieves -8.0 dBm OMA sensitivity at a BER = 10(-12) with a jitter tolerance corner frequency near 20 MHz and a per-channel power consumption of 17 mW including amortized clocking power.

• 出版日期2016-9