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ECE 135 – Group 3 ECE 135 – Group 3 Presentation 4Presentation 4
Bryan ChavezBryan Chavezwith Pat Cleary & Kevin Parkerwith Pat Cleary & Kevin Parker
February 10February 10thth, 2005 , 2005
Work SummaryWork Summary
Further Research into VCSELsFurther Research into VCSELsResearched ROSA Solutions in place of Researched ROSA Solutions in place of PDsPDsFour Corners Analysis for multiple Four Corners Analysis for multiple candidate VCSELscandidate VCSELsContact vendorsContact vendorsFurther Optical Link BudgetingFurther Optical Link BudgetingTest and Build Tx BoardTest and Build Tx Board
GANTT ChartGANTT ChartID Task Name Start Finish Duration
Apr 2005Mar 2005Feb 2005Jan 2005
3/20 4/102/20 3/131/30 4/33/6 4/172/6 2/272/13 3/27 4/241/231/16
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3d1/21/20051/19/2005Group Management Plan
2w 4d2/7/20051/19/2005Background Research
8w4/1/20052/7/2005Board 1 Research
4w4/22/20053/28/2005Board 2 Research
1w1/28/20051/24/2005Evaluation Board Testing
1w2/4/20051/31/2005Optical Link Budget
1w2/4/20051/31/2005Part Selection
1w2/11/20052/7/2005Order VCSEL/PD’s
2w2/18/20052/7/2005Build Test Board
1w2/11/20052/7/2005Design Board 1 Schematic
1w2/18/20052/14/2005Board 1 Design
1w2/25/20052/21/2005Board 1 Design Review
1w3/4/20052/28/2005Order PCB’s
1w3/11/20053/7/2005Board 1 Construction
1w 2d3/21/20053/11/2005Spring Break
2w4/1/20053/21/2005Board 1 Testing/Troubleshooting
1w4/1/20053/28/2005Design Modifications
1w4/8/20054/4/2005Board 2 Construction
2w4/22/20054/11/2005Board 2 Testing/Troubleshooting
1w 3d4/27/20054/18/2005Final Report Prep
0w2/22/20052/22/2005Test
0w3/25/20053/25/2005Midterm Report
0w4/27/20054/27/2005Final Report
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Background Work for Four Corners Background Work for Four Corners and Optical Link Budgetand Optical Link Budget
Eye safe limit Eye safe limit →→ P Pmaxmax = 1 mW = 1 mW
From the 802.3 standard From the 802.3 standard →→ extinction ratio = 9dBextinction ratio = 9dBThus we see that PThus we see that Pminmin = P = Pmaxmax *10^(-9/10) *10^(-9/10)
PPminmin = .12589 mW = .12589 mW
Maximum Link Power Budget Loss at Rx Maximum Link Power Budget Loss at Rx from 802.3 Standard = 7.5 dBfrom 802.3 Standard = 7.5 dB
VCSEL Four Corner Analysis (A)VCSEL Four Corner Analysis (A)
HFE439x-521
Manufacturer Part I_th (mA)η (mW/mA)
I_tot(MAX) (mA)
I_tot(MIN) (mA) I_bias (mA) I_mod (mA)
Advanced Optical Components (2.5G) SC HFE439x-541 0.5 0.04 25.5000 3.6473 14.5736 21.8528
Advanced Optical Components (2.5G) SC HFE439x-541 2.5 0.04 27.5000 5.6473 16.5736 21.8528
Advanced Optical Components (2.5G) SC HFE439x-541 0.5 0.16 6.7500 1.2868 4.0184 5.4632
Advanced Optical Components (2.5G) SC HFE439x-541 2.5 0.16 8.7500 3.2868 6.0184 5.4632
VCSEL Four Corner Analysis (B)VCSEL Four Corner Analysis (B)
Manufacturer Part I_th (mA)η (mW/mA) I_tot(MAX) (mA) I_tot(MIN) (mA) I_bias (mA) I_mod (mA)
Emcore (2.5) TO - 46 0.5 0.2 5.5000 1.1295 3.3147 4.3706
Emcore (2.5) TO - 46 2.5 0.2 7.5000 3.1295 5.3147 4.3706
Emcore (2.5) TO – 46 0.5 0.4 3.0000 0.8147 1.9074 2.1853
Emcore (2.5) TO - 46 2.5 0.4 5.0000 2.8147 3.9074 2.1853
TO - 46
VCSEL Four Corner SummaryVCSEL Four Corner SummaryPartPart Current Current
RequirementsRequirementsConnector?Connector? NotesNotes PricePrice
AA OkOk LCLC LC OnlyLC OnlyUSAUSA
$7.25 (1k+)$7.25 (1k+)$14.50 (1-999)$14.50 (1-999)
BB ExcellentExcellent LC or SCLC or SC LC AvailableLC AvailableSC?SC?USAUSA
Unknown (1k+)Unknown (1k+)Free (small Free (small quantities)quantities)
ROSA DatasheetROSA Datasheet
ROSA Min (V/W) Typical (V/W) Max (V/W) Notes Price
Luxnet (1.25) (LC or SC) 5000 Taiwan ?
Optowell (1.25 or 2.5) (LC or SC) 2000 Taiwan ?
AOCtech (1.25) (SC) PTCM966-SC .5 A/W? USA ?
Advanced Optical Components (up to 2.5) (SC) HFD3381-102 1400 USA
$5 (1-999)$10 (>1k)
Advanced Optical Components (up to 2.5) (LC) HFD3180-108 1500 2500 3500 USA
$5 (1-999)$10 (>1k)
Draft Optical Link BudgetDraft Optical Link Budget
Advanced Optical Components Advanced Optical Components HFE419x-541 with HFE419x-541 with
HFD3180-108 ROSAHFD3180-108 ROSAIth (mA)Ith (mA) 1.81.8
DC Bias of laser (mA)DC Bias of laser (mA) 10.2910.29
Slope Efficiency (mW/mA)Slope Efficiency (mW/mA) 0.1250.125
Modulation Current of Tx (mA)Modulation Current of Tx (mA) 29.136929.1369
Range of Power Output (mW)Range of Power Output (mW) 0.12589 - 1.00.12589 - 1.0
Range of Power at Rx (mW) – 7.5 dB LossRange of Power at Rx (mW) – 7.5 dB Loss .02239 - .17783.02239 - .17783
Voltage Output Range from ROSA (mV)Voltage Output Range from ROSA (mV) 55.98 – 444.5855.98 – 444.58
Voltage Input Range for Maxim 3264 (mV)Voltage Input Range for Maxim 3264 (mV) 5 - 12005 - 1200
Tx Board ConstructionTx Board Construction
Tx Board PerformanceTx Board Performance
0 dB Attenuation0 dB AttenuationBER: < 10^-9BER: < 10^-91 Minute Duration1 Minute Duration
Tx Board PerformanceTx Board Performance
10 dB Attenuation10 dB AttenuationBER: < 10^-9BER: < 10^-91 Minute Duration1 Minute Duration
Tx Board PerformanceTx Board Performance
20 dB Attenuation20 dB AttenuationBER: < 2x10^-7BER: < 2x10^-71 Minute Duration1 Minute Duration
Tx Board PerformanceTx Board Performance
30 dB Attenuation30 dB AttenuationBER: NO SIGNALBER: NO SIGNAL1 Minute Duration1 Minute Duration
Links for VCSELs & ROSAsLinks for VCSELs & ROSAs
http://www.advancedopticalcomponents.com/http://www.advancedopticalcomponents.com/documents/HFE438x-521.pdfdocuments/HFE438x-521.pdfhttp://www.emcore.com/assets/fiber/http://www.emcore.com/assets/fiber/TO462.5Gbps.pdfTO462.5Gbps.pdfhttp://www.advancedopticalcomponents.com/http://www.advancedopticalcomponents.com/product/documents/HFD3381-102.pdfproduct/documents/HFD3381-102.pdfhttp://www.advancedopticalcomponents.com/http://www.advancedopticalcomponents.com/product/documents/HFD3180-108.pdfproduct/documents/HFD3180-108.pdf
Future WorkFuture WorkOrder VCSEL/ROSAOrder VCSEL/ROSA
Build and Test Rx BoardBuild and Test Rx Board
Finalize Optical Link BudgetFinalize Optical Link Budget
Design Board 1 SchematicDesign Board 1 Schematic
Design Board 1 LayoutDesign Board 1 Layout