Project GabE ECE 135 Spring 2005

1
Project GabEECE 135Spring 2005

• Adam Durity
• Omar Al-Jadda
• Patrick Crosby
• Rahmin Sarabi

2
Progress Report

• Built and Tested Test Board
• Finalized Parts for Ordering

3
Gantt Chart
4
Building Test Board

• Soldered Transmitter of Test Board
• Discovered missing capacitors on back

5
Testing Test Board

• Tested board in lab at 10dB and 30dB attenuation
  using PRBS.7 pattern
• Obtained a BER of 10e-9 at 10dB attenuation
• Observed that the laser driver chip gets hot

6
Testing Test Board (Pictures)
10dB Attenuation
30dB Attenuation
7
Final Part Order Plan

• VCSEL Advanced Optical Components HFE419x-441
• ROSA Advanced Optical Components HFD3180-108
• Both parts are LC connectorized
• Not yet contacted about price and availability

8
Final Optical Link Budget
Advance Optical Components HFE419x-441 2.5Gb/s 850nm        
  Units Min Typ Max  
Threshold Current (mA) mA 0.5 1.8 2.5  
Slope Efficiency (mW/mA) mW/mA 0.04 0.125 0.16  
  Ith ? Imax Imin Ibias Imod
  0.50 0.04 25.50 3.65 14.57 21.85
  0.50 0.16 6.75 1.29 4.02 5.46
  2.50 0.04 27.50 5.65 16.57 21.85
  2.50 0.16 8.75 3.29 6.02 5.46

• Imod meets 802.3 specifications
• Threshold Current and Slope Efficiency fall
  within our ranges of acceptable values

9
Upcoming Week

• Order Parts (by Friday)
• Begin schematic
• Submit schematic for first review

10
References

• http//www.advancedopticalcomponents.com/product/d
  ocuments/HFE419x-441.pdf
• http//www.advancedopticalcomponents.com/product/d
  ocuments/HFD3180-108.pdf
• http//standards.ieee.org/getieee802/download/802.
  3-2002.pdf