Hello-
We are running a booster and are experiencing ringing in a step response.
The booster is driving an AOM with an urukul -> booster -> aom configuration, f0=80MHz. Looking at the optical signal with a fast photodiode, there is ringing in the step trace. Looking at the rf out of the booster shows ringing and asymmetry in the waveform. The rf out of the urukul looks ok. Swapping in a Mini-Circuits ZHL-03-5WF+ in place of the booster removes any observed ringing.
To attempt to reduce this ringing, I tried calibrating the bias current to 50mA (and other values) with biascal, and also tweaking the DAC bias voltage with bias, neither seemed to make much difference.
Is this behavior to be expected? Might there be a way to reduce this ringing effect? Any help or input would be greatly appreciated - thanks in advance.
AOM optical pulse:
RF pulse out of urukul:
RF pulse out of booster: (note vertical asymmetry and ringing)
Spectrum of booster (apologies for the poor image quality, this is 10db per division, showing a 2nd harmonic of -9dBc. I did find high harmonic content being discussed in issue 380):
Hello-
We are running a booster and are experiencing ringing in a step response.
The booster is driving an AOM with an urukul -> booster -> aom configuration, f0=80MHz. Looking at the optical signal with a fast photodiode, there is ringing in the step trace. Looking at the rf out of the booster shows ringing and asymmetry in the waveform. The rf out of the urukul looks ok. Swapping in a Mini-Circuits ZHL-03-5WF+ in place of the booster removes any observed ringing.
To attempt to reduce this ringing, I tried calibrating the bias current to 50mA (and other values) with
biascal, and also tweaking the DAC bias voltage withbias, neither seemed to make much difference.Is this behavior to be expected? Might there be a way to reduce this ringing effect? Any help or input would be greatly appreciated - thanks in advance.
AOM optical pulse:
RF pulse out of urukul:
RF pulse out of booster: (note vertical asymmetry and ringing)
Spectrum of booster (apologies for the poor image quality, this is 10db per division, showing a 2nd harmonic of -9dBc. I did find high harmonic content being discussed in issue 380):
