J
Joerg
Hello Folks,
Does anyone know a DFB laser module that is a bit more agile in
frequency pulling via diode current? The 1500nm range would be nice but
we can also go towards 1350nm.
Right now we are trying it with a JDS Uniphase CQF915 module and it
feels like kicking an oak tree. Ideally I'd like to be able to drag it
across a 100pm in a few milliseconds, or at least tens of milliseconds.
This would correspond to a current change of about 25mA. I have designed
a dual loop controller that also uses the TEC to support this FM plus
lots of (slower) overrange and it works nicely. But the DFB seems to
buck and as soon as I make the loop too fast it has difficulties locking.
Does anyone know a DFB laser module that is a bit more agile in
frequency pulling via diode current? The 1500nm range would be nice but
we can also go towards 1350nm.
Right now we are trying it with a JDS Uniphase CQF915 module and it
feels like kicking an oak tree. Ideally I'd like to be able to drag it
across a 100pm in a few milliseconds, or at least tens of milliseconds.
This would correspond to a current change of about 25mA. I have designed
a dual loop controller that also uses the TEC to support this FM plus
lots of (slower) overrange and it works nicely. But the DFB seems to
buck and as soon as I make the loop too fast it has difficulties locking.