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3 Receiver Tests with Attenuation and Shielding RX w/o shield at 5dBRX w/ shield at 5dB
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Presenter: Kenny Haulk
2
This Week’s Highlights
• Tested Receiver with attenuation and shielding
• Measured power output from GDS1250 TX and our own VCSEL
• Alignment tolerance tests• Loopback tests with attenuation and
shielding• Start work on final paper
3
Receiver Tests with Attenuation and Shielding
RX w/o shield at 5dB RX w/ shield at 5dB
4
Receiver Tests with Attenuation and Shielding (continued)
RX at 10dB attenuation TX off
5
Power output from lasers
• Typical power output from the GDS1250 TX is 0.364mW
• With the 5dB attenuator 0.0067mW (with the adjustment: 0.0605mW)
• Max power output from our laser is almost 2mW!
• Adjusted output to around 1mW (eyesafe)
6
Eyesafe TX test
TX at 0dB TX at 5dB
7
Alignment Tolerance Setup
8
Alignment Tolerance Results
• Region where we get acceptable results is basically circular
• Although, we may have estimated the center wrong
• Able to get a good eye, at center, up to 820um away
9
Alignment Tolerance ResultsAlignment Tolerance (z=0)
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
-30 -25 -20 -15 -10 -5 0 5 10 15 20
y-alignment
x-al
ignm
ent
1=10um
10
Loopback Attenuation Tests with Shielding
5dB w/o shielding 5dB with shielding
No optical input
11
Loopback Attenuation Tests with Shielding (continued)
10dB w/o shielding 10dB with shielding
15dB with shielding
12
GANTT Chart
13
Plans for the Coming Week
• Attempt to clean up loopback results • Complete the final paper