Optical Transceiver

Posted on Edited on In

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ODSP: Optical DSP

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Wavelength-Division Multiplexing (WDM)

Different wavelengths can travel simultaneously through the same fiber. This technique is called WDM (Wavelength-Division Multiplexing)

Think of a fiber as a highway, and different wavelengths as different lanes

Linear Driver

J. Q. Wang et al., "7.1 A 2.69pJ/b 212Gb/s DSP-Based PAM-4 Transceiver for Optical Direct-Detect Application in 5nm FinFET," 2024 IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, CA, USA, 2024, pp. 123-125 [https://sci-net.xyz/10.1109/ISSCC49657.2024.10454275]

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AC capacitor maintain AC feedback path of FVF, and provide appropriate DC bias for tail NMOS

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Passive RC Equalization

A. R. Chowdhury, W. Rahman, A. ElShater, T. Ali and V. Stojanovic, "A 212Gb/s/λ 0.91pJ/b Direct-Drive O-Band Monolithic Coherent Transmitter Based on Carrier-Injection-Mode Mach-Zehnder Modulator," 2026 IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, CA, USA, 2026, pp. 1-3, doi: 10.1109/ISSCC49663.2026.11409273.

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reference

Vladimir Stojanović, VLSI 2016 SC6: Integrated Electronic-Photonic Communication Circuits

Azita Emami, CICC 2019 ES3-2: High-Speed Optical Links

Sudip Shekhar, ISSCC 2021 Tutorial, Silicon Photonics: From Basics to ASICs

Mayank Raj, CICC 2024, ES3-3: Design of Silicon photonics based high throughput optical transceivers

Peter Ossieur, ISSCC 2025 tutorial T6: Front-End Circuit Design for High-Speed Optical Transceivers

Vivek Gurumoorthy, Marvell, ISSCC 2025 Circuit Insights: Circuits for Optical Communication

E-Hung Chen, MTK, ISSCC 2026 Forum F2.3: State-of-the-Art 200+ Gb/s Electrical and Optical Interconnects