ELEC 506 – Photonic ICs

CMOS Design for Photonics

Background: 

Silicon Photonics is an emerging technology where the photonic devices are designed using silicon as an optical medium, thereby leveraging semiconductor fabrication techniques that have already seen decades of advancement fueled by Moore’s law.

This course focused towards the understanding, modeling and design of CMOS ICs that can interface with silicon photonic devices.  Students enrolled in the course can either work on the prescribed projects, or propose their own project.

Objectives:

  • Understand the basics of silicon photonics links
  • Analyze and design CMOS circuits for photonics applications.
  • Learn Cadence and Lumerical tools.

Detailed Course Outline:

  • Overview to Silicon Photonics: MZI, Ring, Photodetectors, phase shifters, hybrid lasers
  • VCSELs (time permitting)
  • Optical link budget analysis
  • Basics of CMOS : Revision on MOSFETs, DC and AC response, single transistor and differential circuits, noise and feedback
  • Receivers: Basic concepts, Trans-impedance Amplifier (TIA) Design, Limiting Amplifiers, Input offset cancellation, AGC techniques
  • Transmitters: Modulator Drivers, Terminations, Bias control, Transmission Line
  • Laser Drivers (time permitting)
  • Tuning Circuits
  • Packaging considerations
  • Clock and data recovery (time permitting)

Suggested Reading:

There is no single textbook that covers the course topics in detail. The course will be taught using the instructor’s lecture notes, along with reference books and IEEE Journals (JSSC, TCAS, JLT) and Conferences (ISSCC, VLSI Symposium, CICC).

Reference Textbooks:

  • Design of Integrated Circuits for Optical Communications, B. Razavi, Wiley, 2012 (2nd Ed).
  • Broadband Circuits for Optical Fiber Communication, E. Sackinger, Wiley-Interscience, 2005.
  • Silicon Photonics Design: From Devices to System, L. Chrostowski and M. Hochberg, Cambridge University Press, 2015.

Prerequisites:

  • Basic core undergraduate courses in electronics, i.e. familiarity with CMOS and circuit analysis, and computer-aided design tools for circuit design such as Cadence.

Course Structure:

  • 3 hours of lecture per week
  • Ad-hoc tutorials
  • Content delivery, Q/As – through Piazza.

Grading:

  • Design Project 70%
  • Final 30% (must pass)

Instructor’s Office Hour:

  • After class (K4017)
  • By appointment

FAQs:

Q. I do not have much experience with CMOS circuits. Can I still register for this course?

Yes, if you satisfy the pre-requisite condition.

Q. What do you recommend for revising the basics of Analog CMOS Design?

I would suggest reading and becoming comfortable with Chapter 3 “Basic Current Mirrors and Single-Stage Amplifiers” of Johns & Martin’s Analog Integrated Circuit Design textbook.

Q. I have not used Cadence Spectre before. What should I do?

We would provide tutorial documents on Cadence to you. They include step-by-step instructions for simulating basic circuits. You would need to learn them on your own. You may ask the instructor or other students if you have specific questions.