1. What has been done since the last meeting (quick notes)
John: Achieve anything up to <1700nm <100MHz
Looking into super luminescent LED's: 5 - 30nm spectral width
Power: amp driven LED's - up the power that way (more research needed)
All LED's: approx ~2W, 0.2W when collimated
Samir: Wavelengths: 900 - 1700 nm, with peak at 1550
Can use anything lower than <200 MHz
Power = - 97dB (minimum power needed to detect any data, anything below will be noise - sensitivity needs to be higher or signal will not be detected)
James: Power requirement down to ~28dB (guaranteed 3dB at the end?)
Gathered data and equation to do with bandwidth
Natalie: Fusion splices with 0.01dB - need to research a manufacturer
Note: rolls come in 2km's - 22 splices are needed
2. Questions Answered
- 4 core: treat it as if it is one core with three redundant
- Super luminescent LED's: can be used as long as they take into account all the parameters
- Detection: watts to decibels - can find an equation online
~ 0.7 - 0.9 amp/watt responsivity
Standard: couple of nano amps of noise (1 and above)
Detection errors: dark current, shot and johnson
- Can we use amplifier attached to detector? - Nothing something we need to worry about, all we need is a signal at the end which just has to be detected (does not need to be boosted at the end)
3. What is to be done before the next meeting (Fri 18 Nov)
1. Find the actual manufacturers and costs
2. Type up each individuals blog entries
3. LED: power out researched
4. Detection: look at the possibility of other types of detectors
5. Power decibel calculation with the updated splicing information
John: Achieve anything up to <1700nm <100MHz
Looking into super luminescent LED's: 5 - 30nm spectral width
Power: amp driven LED's - up the power that way (more research needed)
All LED's: approx ~2W, 0.2W when collimated
Samir: Wavelengths: 900 - 1700 nm, with peak at 1550
Can use anything lower than <200 MHz
Power = - 97dB (minimum power needed to detect any data, anything below will be noise - sensitivity needs to be higher or signal will not be detected)
James: Power requirement down to ~28dB (guaranteed 3dB at the end?)
Gathered data and equation to do with bandwidth
Natalie: Fusion splices with 0.01dB - need to research a manufacturer
Note: rolls come in 2km's - 22 splices are needed
2. Questions Answered
- 4 core: treat it as if it is one core with three redundant
- Super luminescent LED's: can be used as long as they take into account all the parameters
- Detection: watts to decibels - can find an equation online
~ 0.7 - 0.9 amp/watt responsivity
Standard: couple of nano amps of noise (1 and above)
Detection errors: dark current, shot and johnson
- Can we use amplifier attached to detector? - Nothing something we need to worry about, all we need is a signal at the end which just has to be detected (does not need to be boosted at the end)
3. What is to be done before the next meeting (Fri 18 Nov)
1. Find the actual manufacturers and costs
2. Type up each individuals blog entries
3. LED: power out researched
4. Detection: look at the possibility of other types of detectors
5. Power decibel calculation with the updated splicing information
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