- This topic has 7 replies, 3 voices, and was last updated 9 years, 12 months ago by
koll.
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November 2, 2015 at 10:41 pm #27367
kollParticipant1)How does the EDFA black box fixed gain in the gain controlled mode?
2)And for power-controlled, is it controlling the input power or pump power? And How it control the power in power-controlled mode?
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November 3, 2015 at 1:10 am #27375
alistuParticipantHi Koll,
I suggest that you go through the help section of the EDFA black box, as there is an extensive and comprehensive explanation of the function performance there with relations there.
Regards
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November 3, 2015 at 1:35 am #27377
kollParticipantHi Alistu
My opticsystem expired. So I can’t access it anymore.
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November 3, 2015 at 2:07 am #27378
Alessandro Festa
Participant1) In controlled gain mode, the EDFA operates with a fixed gain G, which means that the output power will alwaus be Pout=Pin+G
2) In power controlled mode, the EDFA output power is fixed, no matter the input power (obviously Pin must be less than Pout!). So it is not controllin input power or pump power, but it automatically adjust pump power to reach the desired Pout.-
November 3, 2015 at 4:51 am #27387
kollParticipantThank you Alessandro,
Another questions
1)What will be the output optical power level of the EDFA with input 1550 nm power when the 980 nm pump light is completely turned off?
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November 3, 2015 at 5:57 am #27393
Alessandro Festa
Participant1) It depends on the Erbium fiber length…the longer the active fiber, the lower the output power when pump is off
2) Erbium fiber length must be optimized & you can use GFF (gain flattening filter) to equalize the wavelengths at the output of the EDFA.
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November 3, 2015 at 6:02 am #27394
kollParticipant1) It depends on the Erbium fiber length…the longer the active fiber, the lower the output power when pump is off
Do you have an example? Thank you.
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November 3, 2015 at 4:50 am #27386
kollParticipantThank you!
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