Deep analysis of the 400Gb optical transceiver from a leading Chinese company. More information: https://www.systemplus.fr/reverse-costing-reports/innolights-400g-qsfp-dd-optical-transceiver/

1. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 1
22 bd Benoni Goullin
44200 NANTES - FRANCE +33 2 40 18 09 16 info@systemplus.fr www.systemplus.fr
InnoLight’s 400G QSFP-DD Optical Transceiver
Deep analysis of the 400Gb optical transceiver from a leading
Chinese company.
SPR21577 - Photonics report by Sylvain HALLEREAU
Laboratory analysis by Nicolas RADUFE
January 2021 – Sample
REVERSE COSTING® – STRUCTURAL, PROCESS & COST REPORT

2. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 2
Table of Contents
Overview/Introduction 3
o Executive Summary
o Reverse Costing Methodology
Company Profile 8
o InnoLight
Market Analysis 11
o Ecosystem & Forecast
Physical Analysis 15
o InnoLight 400G QSFP-DD Teardown
✓ Module Views
✓ Function Identification
o Transmitter Block
✓ View, Dimensions and Cross-Section
✓ Fiber Optic Coupler, Prism and Rotator
✓ Light Way and lens
o Inphi IN010C50 Die
✓ Die Overview and Dimensions
✓ Die Process and Cross-Section
o Inphi GaAs Laser Driver Die
✓ Die Overview and Dimensions
✓ Die Process and Cross-Section
o InP Laser
✓ InP Waveguide
✓ InP Electro-absorption Modulator
✓ Laser Process and Cross-Section
o Receiver Block
✓ Fiber Optic Coupler
✓ Light Way
o InP Photodiode Die
✓ Die Views & Dimensions
✓ Die Process and Cross-Section
o TIA Die
✓ Die Overview & Dimensions
✓ Die Process and Cross-Section
Manufacturing Process 152
o Optical Elements
o Inphi Die Fab Unit
o GaAs Laser Driver Flow & Unit
o InP Laser Flow & Unit
o InP Diode Flow & Unit
o TIA Die Fabrication Unit
o Transceiver Assembly Unit
Cost Analysis 170
o Summary of the Cost Analysis
o Yields Explanation & Hypotheses
o Transmitter Block
o Inphi IN010C50
o GaAs Driver Die
o InP Laser Die
o Optical Elements
o Peltier Cooler Assembly
o Receiver Block
o InP Photodiode Die
o TIA Die
o Optical Element
o Transceiver Assembly Cost
o Optical Transceiver Cost
Feedback 211
SystemPlus Consulting Services 213

3. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 3
Overview / Introduction
o Executive Summary
o Reverse Costing Methodology
o Glossary
Company Profile & Supply Chain
Market Analysis
Physical Analysis
Physical Comparison
Manufacturing Process Flow
Cost Analysis
Comparison
Feedbacks
Related Reports
About System Plus
Executive Summary
This full reverse costing study has been conducted to provide insight on technology data, manufacturing cost and selling price of the
InnoLight’s 400G QSFP-DD Optical Transceiver.
• The InnoLight's 400G QSFP-DD is on of the first 400G optical transceiver on the market and it allows to communicate up to 2km in
PSM4. The InnoLight solution is based on the INPHI chipset, the IN010C50 PAM4 DSP, the four GaAs laser driver dies, and a TIA die,
all designed by INPHI.
• The transceivers came with two separated line with several dies. The transmitter integrated four InP lasers drived by four GaAs dies.
Other components are added to the system in order to focus or isolate the signals. The data are processed using a PAM4 DSP from
INPHI. The lasers are an electro-absorption modulated DFB laser in InP. The connector assembly is complex. For the four emission
fibers, a laser, a lens, an isolator and the fiber are aligned. The lasers are cooled thank to a peltier cooler.
• The receiver function is performed by four InP photodiodes die and a TransImpedance Amplifier (TIA) circuit. A fiber optical coupler
and focusing lenses are used to connect the photodiode die with the fiber optic.
• This report is an exhaustive analysis of the InnoLight 400G QSFP-DD optical transceiver, including a full analysis of the laser die,
photodiode die, the TIA circuit, GaAs laser driver circuit, the PAM4 DSP circuit along with a cost analysis and price estimate. A
complete physical analysis with SEM pictures, cross-sections, EDX analysis to identify the material has been performed to shown all
the technical characteristics of the main component of the optical transceiver. The other parts, electronic, optic and housing are
equally estimated. More details on the optical parts and the assembly are described in the report. The cost estimation of assembly
of the electronic and the optic are performed in the report.

4. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 4
Overview / Introduction
Company Profile & Supply Chain
Market Analysis
Physical Analysis
o 400G QSFP-DD Teardown
o Transmitter Block
o View, Dimensions, Cross-
Section, Fiber Optic Coupler
o Inphi PAM4 DSP Die
o Die View & Cross-section
o Inphi GaAs Laser Driver Die
o Die View & Cross-section
o InP EML die
o Waveguide
o Electro-Absorption
Modulator
o DFB Laser
o Receiver Block
o Fiber Optic Coupler, Lens
o InP Photodiode Die
o Die View & Cross-Section
o Inphi TIA Die
Manufacturing Process Flow
Cost Analysis
Comparison
Feedbacks
Related Reports
About System Plus
InnoLight 400G QSFP-DD
InnoLight 400G QSFP-DD Front side
©2021 by System Plus Consulting
InnoLight 400G QSFP-DD Front, Side and Back View
©2021 by System Plus Consulting
Dimensions
o Height: 127 mm
o Width: 18.4 mm
o Thickness: 8.5 mm
127 mm
93 mm
8.5 mm 12.4 mm
18.4 mm
Weight
o 60g

5. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 5
Overview / Introduction
Company Profile & Supply Chain
Market Analysis
Physical Analysis
o 400G QSFP-DD Teardown
o Transmitter Block
o View, Dimensions, Cross-
Section, Fiber Optic Coupler
o Inphi PAM4 DSP Die
o Die View & Cross-section
o Inphi GaAs Laser Driver Die
o Die View & Cross-section
o InP EML die
o Waveguide
o Electro-Absorption
Modulator
o DFB Laser
o Receiver Block
o Fiber Optic Coupler, Lens
o InP Photodiode Die
o Die View & Cross-Section
o Inphi TIA Die
Manufacturing Process Flow
Cost Analysis
Comparison
Feedbacks
Related Reports
About System Plus
InnoLight 400G QSFP-DD Teardown

6. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 6
Overview / Introduction
Company Profile & Supply Chain
Market Analysis
Physical Analysis
o 400G QSFP-DD Teardown
o Transmitter Block
o View, Dimensions, Cross-
Section, Fiber Optic Coupler
o Inphi PAM4 DSP Die
o Die View & Cross-section
o Inphi GaAs Laser Driver Die
o Die View & Cross-section
o InP EML die
o Waveguide
o Electro-Absorption
Modulator
o DFB Laser
o Receiver Block
o Fiber Optic Coupler, Lens
o InP Photodiode Die
o Die View & Cross-Section
o Inphi TIA Die
Manufacturing Process Flow
Cost Analysis
Comparison
Feedbacks
Related Reports
About System Plus
InnoLight 400G QSFP-DD Teardown - Transmitter

7. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 7
Overview / Introduction
Company Profile & Supply Chain
Market Analysis
Physical Analysis
o 400G QSFP-DD Teardown
o Transmitter Block
o View, Dimensions, Cross-
Section, Fiber Optic Coupler
o Inphi PAM4 DSP Die
o Die View & Cross-section
o Inphi GaAs Laser Driver Die
o Die View & Cross-section
o InP EML die
o Waveguide
o Electro-Absorption
Modulator
o DFB Laser
o Receiver Block
o Fiber Optic Coupler, Lens
o InP Photodiode Die
o Die View & Cross-Section
o Inphi TIA Die
Manufacturing Process Flow
Cost Analysis
Comparison
Feedbacks
Related Reports
About System Plus
InnoLight 400G QSFP-DD – Laser Chip Carrier

8. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 8
Overview / Introduction
Company Profile & Supply Chain
Market Analysis
Physical Analysis
o 400G QSFP-DD Teardown
o Transmitter Block
o View, Dimensions, Cross-
Section, Fiber Optic Coupler
o Inphi PAM4 DSP Die
o Die View & Cross-section
o Inphi GaAs Laser Driver Die
o Die View & Cross-section
o InP EML die
o Waveguide
o Electro-Absorption
Modulator
o DFB Laser
o Receiver Block
o Fiber Optic Coupler, Lens
o InP Photodiode Die
o Die View & Cross-Section
o Inphi TIA Die
Manufacturing Process Flow
Cost Analysis
Comparison
Feedbacks
Related Reports
About System Plus
InnoLight 400G QSFP-DD – Lens

9. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 9
Overview / Introduction
Company Profile & Supply Chain
Market Analysis
Physical Analysis
o 400G QSFP-DD Teardown
o Transmitter Block
o View, Dimensions, Cross-
Section, Fiber Optic Coupler
o Inphi PAM4 DSP Die
o Die View & Cross-section
o Inphi GaAs Laser Driver Die
o Die View & Cross-section
o InP EML die
o Waveguide
o Electro-Absorption
Modulator
o DFB Laser
o Receiver Block
o Fiber Optic Coupler, Lens
o InP Photodiode Die
o Die View & Cross-Section
o Inphi TIA Die
Manufacturing Process Flow
Cost Analysis
Comparison
Feedbacks
Related Reports
About System Plus
Laser Die Functions Area
Die Overview
©2021 by System Plus Consulting

10. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 10
Overview / Introduction
Company Profile & Supply Chain
Market Analysis
Physical Analysis
o 400G QSFP-DD Teardown
o Transmitter Block
o View, Dimensions, Cross-
Section, Fiber Optic Coupler
o Inphi PAM4 DSP Die
o Die View & Cross-section
o Inphi GaAs Laser Driver Die
o Die View & Cross-section
o InP EML die
o Waveguide
o Electro-Absorption
Modulator
o DFB Laser
o Receiver Block
o Fiber Optic Coupler, Lens
o InP Photodiode Die
o Die View & Cross-Section
o Inphi TIA Die
Manufacturing Process Flow
Cost Analysis
Comparison
Feedbacks
Related Reports
About System Plus
Laser Die Functions Area - Laser Cross-Section
EAM Cross-section – SEM view
©2021 by System Plus Consulting

11. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 11
Overview / Introduction
Company Profile & Supply Chain
Market Analysis
Physical Analysis
o 400G QSFP-DD Teardown
o Transmitter Block
o View, Dimensions, Cross-
Section, Fiber Optic Coupler
o Inphi PAM4 DSP Die
o Die View & Cross-section
o Inphi GaAs Laser Driver Die
o Die View & Cross-section
o InP EML die
o Waveguide
o Electro-Absorption
Modulator
o DFB Laser
o Receiver Block
o Fiber Optic Coupler, Lens
o InP Photodiode Die
o Die View & Cross-Section
o Inphi TIA Die
Manufacturing Process Flow
Cost Analysis
Comparison
Feedbacks
Related Reports
About System Plus
Lens
Lens – bottom view
©2021 by System Plus Consulting
Lens – Tilted optical view
©2021 by System Plus Consulting

12. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 12
Overview / Introduction
Company Profile & Supply Chain
Market Analysis
Physical Analysis
Manufacturing Process Flow
o Optical Elements
o Inphi Die Fab Unit
o GaAs Laser Driver Flow & Unit
o InP Laser Flow & Unit
o InP Diode Flow & Unit
o TIA Die Fabrication Unit
o Transceiver Assembly Unit
Cost Analysis
Comparison
Feedbacks
Related Reports
About System Plus
EML Laser Die Wafer Process Flow (1/5)

13. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 13
Overview / Introduction
Company Profile & Supply Chain
Market Analysis
Physical Analysis
Manufacturing Process Flow
Cost Analysis
o Cost Analysis Summary
o Yields Explanation &
Hypotheses
o Transmitter Block
o Inphi IN010C50
o GaAs Driver Die
o InP Laser Die
o Optical Elements
o Peltier Cooler Assembly
o Receiver Block
o InP Photodiode Die
o TIA Die
o Optical Element
o Transceiver Assembly
Comparison
Feedbacks
Related Reports
About System Plus
INPHI GaAs Laser Driver Die Cost and Price

14. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 14
Overview / Introduction
Company Profile & Supply Chain
Market Analysis
Physical Analysis
Manufacturing Process Flow
Cost Analysis
Comparison
Feedbacks
Related Reports
About System Plus
REVERSE COSTING ANALYSES- SYSTEM PLUS CONSULTING
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15. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 15
COMPANY
SERVICES

16. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 16
Overview / Introduction
Company Profile & Supply Chain
Market Analysis
Physical Analysis
Manufacturing Process Flow
Cost Analysis
Comparison
Feedbacks
Related Reports
About System Plus
o Company services
o Contact
o Legal
Business Models Fields of Expertise
Custom Analyses
(>130 analyses per year)
Reports
(>60 reports per year)
Costing Tools
Trainings

17. ©2021 by System Plus Consulting | SPR215777 InnoLight’s 400G QSFP-DD Optical Transceiver | Sample 17
Overview / Introduction
Company Profile & Supply Chain
Market Analysis
Physical Analysis
Manufacturing Process Flow
Cost Analysis
Comparison
Feedbacks
Related Reports
About System Plus
o Company services
o Contact
o Legal
Contact
Headquarters
22 bd Benoni Goullin
44200 Nantes
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+33 2 40 18 09 16
sales@systemplus.fr
Europe Sales Office
Lizzie LEVENEZ
Frankfurt am Main
GERMANY
+49 151 23 54 41 82
llevenez@systemplus.fr
www.systemplus.fr
NANTES
Headquarter
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YOLE Inc.
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