A 25 Gb/s Hybrid-Integrated Silicon Photonic Source-Synchronous Receiver With Microring Wavelength Stabilization
- Resource Type
- Authors
- Alex Titriku; Cheng Li; Hao Li; Zhongkai Wang; Samuel Palermo; Binhao Wang; Rui Bai; Ayman Shafik; Marco Fiorentino; Chin-Hui Chen; Patrick Chiang; Kunzhi Yu
- Source
- IEEE Journal of Solid-State Circuits. 51:2129-2141
- Subject
- Transimpedance amplifier
Physics
Silicon photonics
business.industry
020208 electrical & electronic engineering
02 engineering and technology
Optical performance monitoring
Waveguide (optics)
Cutoff frequency
Responsivity
020210 optoelectronics & photonics
Wavelength-division multiplexing
Hardware_INTEGRATEDCIRCUITS
0202 electrical engineering, electronic engineering, information engineering
Optoelectronics
Electrical and Electronic Engineering
business
Jitter
- Language
- ISSN
- 1558-173X
0018-9200
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 $43~\mu \text {W}$ /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 $= 10^{\mathrm {-12}}$ with a jitter tolerance corner frequency near 20 MHz and a per-channel power consumption of 17 mW including amortized clocking power.