Optical Gigabit Ethernet

1
Optical Gigabit Ethernet

• Group 4
• February 24, 2005
• Ronen Adato

2
Progress Overview

• Received VCSELs and ROSAs
• Completed initial schematics
• Priced all passives
• Created webpage

3
VCSELs

• Emcore TO-46, 2.5 Gb/s VCSEL
• High performance VCSEL
• Costs Free samples

4
VCSELs

• Lasermate TSC-P85A426-2 VCSEL
• SC connectorized VCSEL
• Costs
• 1 32.00/unit
• gt10,000 7.95/unit

5
ROSAs

• Lasemate RSC-P85P416 1.25 Gb/s SC ROSA
• SC connectorized ROSA
• Costs
• 2-3 36.00/unit
• gt10,000 6.00/unit

6
Transmitter Schematic
7
Transmitter Schematic

• Schematic derived from Maxim laser driver and
  evaluation board data sheets as well as past
  groups work
• Key points and considerations for PCB layout
• Numerous capacitors and filters used to prevent
  interference and noise
• The Lasermate VCSEL is common anode type, and
  needs to be connected accordingly
• The loop connecting OUT (pin 12) to the laser
  supply needs to be tight
• Power line is to be run under the Maxim chip

8
Receiver Schematic
9
Receiver Schematic

• Schematic derived from Maxim receiver evaluation
  board data sheets as well as past groups work
• Key points and considerations for PCB layout
• Supply filters placed between the transmitter and
  receiver supply lines and between the ROSA and
  Limiting Amplifier

10
Passive Component Selection

• Decided to buy all passives except for SMA
  connectors from one vendor to minimize shipping
  issues

11
GANTT Chart
12
Tasks for Next Week

• Order all passive components
• Complete financial budget and bill of materials
• Complete initial PCB board layout designs and
  submit for review by Tuesday