This brief presents a clocked pluggable optics suitable for high-density data center interconnections. The proposed architecture performs a SERDES function at the module side by exploiting a forwarded clock from the ASIC. Due to the relaxed channel loss of the ASIC-to-module interface, the use of power-hungry equalizers can be avoided. Based on an 850-nm multi-mode fiber interface, a 25-Gb/s link operation is demonstrated. A vertical-cavity surface-emitting laser-based transmitter outputs an optical modulation power of 0.6 mW. The optical receiver sensitivity is measured to be-7.5 dBm at 21.2 Gb/s with an optical excitation, and 120 μ App at 25 Gb/s with an electrical excitation. The jitter tracking capability of the implemented clock and data recovery is evaluated in the presence of ±100-ppm frequency offsets and the measured jitter tolerance complies with the 100 GbE specification well. The optical transceiver is implemented in 65-nm CMOS technology and consumes 281 mW at 25 Gb/s, corresponding to the energy efficiency of 11.2 pJ/b.
|Number of pages||5|
|Journal||IEEE Transactions on Circuits and Systems II: Express Briefs|
|Publication status||Published - 2018 Oct|
Bibliographical noteFunding Information:
Manuscript received June 7, 2018; accepted June 21, 2018. Date of publication June 25, 2018; date of current version September 27, 2018. This work was supported by the Electronics and Telecommunications Research Institute. This brief was recommended by Associate J. B. Begueret. (Corresponding author: Deog-Kyoon Jeong.) G.-S. Jeong, J. Hwang, H.-S. Choi, H. Do, D. Koh, D. Yun, J. Lee, K. Park, H.-G. Ko, K. Lee, and D.-K. Jeong are with the Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, South Korea, and also with the Inter-University Semiconductor Research Center, Seoul National University, Seoul 08826, South Korea (e-mail: email@example.com; firstname.lastname@example.org).
© 2004-2012 IEEE.
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering