Technology

Optical Transceivers and Photonic Circuits

Analog, High-Speed, and Diode Laser Integrated Circuit Layout for Optical CommunicationsBy Amara Okonkwo

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Length13h 9m

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Between the laser and the recovered bit sit a dozen circuits that must all meet budget. This book designs them with you. An optical transceiver is not one invention but a chain of compromises: a laser that must be biased, modulated and kept cool; a driver that must swing fast without ringing; a photodiode whose every stray picofarad costs sensitivity; a transimpedance amplifier pushed against the transimpedance limit; and a clock recovery loop that must lock onto a signal already blurred by jitter and dispersion. Each stage has its own budget, and a link only closes when every one of them does. This book works through that chain from first principles, with the equations and the practical numbers side by side. You will begin with the optical link budget and the fibre propagation limits that set the target, then work through laser rate equations to understand chirp, relaxation oscillation and noise, and use that understanding to choose between direct modulation, electroabsorption and Mach-Zehnder drive. On the receive side you will select PIN or avalanche detection, size a shunt-feedback transimpedance amplifier against the transimpedance limit and its input-referred noise, chain limiting stages, cancel offset, and close a clock recovery loop that survives real jitter. Later chapters extend the design to equalisation and four-level signalling, silicon photonic waveguides, couplers and ring modulators, and the layout, shielding, electrostatic discharge and packaging choices that decide whether a transceiver works on the bench and in the field. What you will learn • Build and close an optical link budget from transmitter power to receiver sensitivity • Apply laser rate equations to chirp, relaxation oscillation and noise in diode laser design • Compare direct modulation, electroabsorption and Mach-Zehnder drive for a given reach and rate • Design laser and modulator driver circuits that meet speed and integrity targets • Choose between PIN and avalanche photodetectors and predict their noise contribution • Size a shunt-feedback transimpedance amplifier against the transimpedance limit • Chain post-amplifiers, AGC and offset control without losing dynamic range • Close a clock and data recovery loop that tolerates real jitter • Extend a link to equalisation, PAM4 and higher data rates • Lay out, shield, protect and package a transceiver so it works outside simulation Written for analog and photonics IC engineers and graduate students, the book assumes comfort with small-signal circuit analysis and basic semiconductor device physics, and takes you from the link budget to the packaged module. It is equally suited to engineers moving into optical communications from wireline or RF design, and to graduate students who need the full signal chain in one place rather than scattered across papers.

Audiobook details

GenreTechnology

Length13 hrs 9 mins

Narrated byListen with 1,000+ voices

FormateBook with Audio

Publish dateSep 27, 2026

LanguageEnglish

1Optical Transceivers and Photonic Circuits

2Foreword

3Preface

4About This Book

5Chapter 1: Optical Links and Budgets

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61.1 Anatomy of an Optical Link and Its Specification Sheet

71.2 Bit Error Rate, Q Factor and the Gaussian Approximation

81.3 Sensitivity, Overload and the Receiver Specification Window

91.4 Power Penalties and the Engineering Margin

101.5 Closing a Link Budget: A Complete Worked Design

111.6 From Budget to Silicon: What the Numbers Demand of the Circuits

12Chapter 2: Fibre Propagation and Bandwidth Limits

132.1 Guiding in Single-Mode and Multimode Fibre

142.2 Chromatic Dispersion and Dispersion Penalty

152.3 Polarisation Mode Dispersion and Fibre Nonlinearity

162.4 Modal Bandwidth and Multimode Reach

172.5 Reach Classes and Technology Selection

18Chapter 3: Semiconductor Laser Physics and Diode Laser Design

193.1 Optical Gain, Carrier Density and Threshold

203.2 Rate Equations, Relaxation Oscillation and Modulation Response

213.3 Linewidth, Chirp and Relative Intensity Noise

223.4 Fabry–Perot, DFB and VCSEL Structures

233.5 Quantum Wells, Temperature Behaviour and Reliability Margins

24Chapter 4: Modulation Approaches

254.1 Direct Modulation Limits and When to Leave Them Behind

264.2 Electroabsorption Modulators

274.3 Mach–Zehnder Modulators and Their Drive Requirements

284.4 Chirp, Extinction and Penalty Trade-offs Across Formats

294.5 Modulator Drive Specification: From Penalty to Volts and Milliamps

30Chapter 5: Laser and Modulator Driver Circuits

315.1 Bias, Modulation and Automatic Power Control Loops

325.2 Output Stage Topologies and Back Termination

335.3 Peaking, Pre-emphasis and Bandwidth Extension

345.4 Thermal Control, Power Dissipation and Protection

35Chapter 6: Photodetectors

366.1 PIN Structure, Responsivity and Quantum Efficiency

376.2 Avalanche Photodiodes, Multiplication and Excess Noise

386.3 Junction Capacitance, Transit Time and Bandwidth

396.4 Dark Current, Temperature Behaviour and Reliability

40Chapter 7: Transimpedance Amplifier Design

417.1 Shunt-Feedback and Common-Gate Front-End Topologies

427.2 The Transimpedance Limit and Gain–Bandwidth Trade

437.3 Input-Referred Noise and Its Integration

447.4 Bandwidth, Stability and Compensation

457.5 Dynamic Range, Overload and Automatic Gain Control Interface

46Chapter 8: Post-Amplifiers, AGC and Offset Control

478.1 Limiting Amplifier Chains and Cascaded Bandwidth

488.2 Automatic Gain Control Loops

498.3 DC Offset Cancellation and Low-Frequency Cutoff

508.4 Output Buffers, Level Translation and Interface to the Decision Circuit

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Optical Transceivers and Photonic Circuits

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