OM3 PIE vs launch

1
OM3 PIE vs launch

• Fred Sugihwo, Jonathan King

2
OM3 PIE-D measurements

• TIA 2.2 demo fibres, 300m
• Step response of channel measured using
  representative 10G TOSA DML transmitter and 10G
  ROSA
• Isolated '1' synthesized from step response, and
  PIE-D calculated according to Bhoja_1_0704

3
Launch Configurations
SM Center Launch
MCP Launch
MMF
MMF
Tx
Rx
Tx
Rx
MCP
MCP Connector Offset Launch
SMCL Connector Offset Launch
MMF
MMF
Tx
Rx
Tx
Rx
MCP
6um SM-MM offset
7um MM-MM offset
4
OM3 effect of launch on TIA 2.2 demo reels

• Worst case PIE-D
• Color code
• Red 5.5dB PIE-D
• Yellow 4-5.5dB PIE-D
• Green
• Best launch for OM3 fibers is single-mode centre
  launch

5
OM3 effect of launch on TIA 2.2 demo reels

• Input patchcord manipulated to give highest PIE-D
• Best launch for OM3 fibers is single-mode centre
  launch
• Direct centre launch into MMF also viable
• 50um offset launch results in significantly
  higher PIE-D