> > Currently we provide no DC bias to the diode - it works better for our setup.
> >
> > I wonder if it would be possible to reduce series resistor inside diode
> > insertion unit to 2-2.5Ohm?
> >
> > XXXXX,
> >
> > The AVO-9G-B-P- UFB produces up to 50V at its output. The
> > AVX-S3B-P3- UFB has a 4:1 transformer which reduces this to 12.5V, so
> > that it can drive the 3 Ohm series resistance.
> >
> > If no DC bias is applied to the diode, the maximum current would be
> > given by (12.5V - 3.5V) / 3 Ohms = 3A.
> >
> > If the diode is biased just below threshold (for example 2.5V) using the
> > DC input on the output module, the maximum current can be boosted since
> > the pulse is AC-coupled on top of the DC bias. Thus, you would obtain
> > (12.5V - 3.5V + 2.5V) / 3 Ohms = 3.8A.
> >
> > To obtain the full 4A under no-bias conditions, the output of the
> > AVO-9G-B-P- UFB would need to be boosted from 50V to 62V, so that (62V/4
> > - 3.5V) / 3 Ohms = 4.0A. The AVO-9G-B-P- UFB mainframe would have to be
> > returned to the factory to achieve this. If this is required, let me
> > know and I can provide a quote.
> >
> > I hope this is helpful.
> >
> >
> > Regards,
> > Dr. Michael J. Chudobiak
> > Chief Engineer
> > > Thank you, Michael.
> > >
> > > I just would like to double check few details.
> > > We are going to use 4A unit with the same Lumics diode (as specified in the
> > > quote). At 4A, the voltage drop across the diode may grow up to about 3.5V -
> > > driver should be capable applying that voltage.
> > >
> > > Also as we talked before pulse rise time is about 1ns and ringing <10%. We are
> > > going to use the driver for 20ns-to-200ns pulses.
> > >
> > > Please let me know if there are any issues with that.
> > >
> > > XXXXX,
> > >
> > > We can provide two week delivery of your AVX-S3B-P3- UFB for a 15%
> > > premium, if you get the order in today. (Time is very tight because of
> > > summer holidays early in July!)
> > >
> > > I am pleased to re-quote with new pricing and delivery time, as follows:
> > >
> > >
> > >
> > > Quote number: 12636
> > >
> > > Model number: AVX-S3B-P3- UFB
> > >
> > > Description: Laser Diode Bias Insertion Unit with Socket and Internal
> > > Current-Quadrupling Transformer. Can be used to boost AVO-9G-B-P- UFB
> > > (S/ 11173) output to 4A.
> > >
> > > -P3- UFB option: The socket will accept pins 1-8 (i.e., all pins) of the
> > > Lumics LU0977M200-2301200 DIP-packaged diode, for which you had
> > > previously faxed us a brief datasheet. (The faxed document doesn't show
> > > detailed dimensions for the package, but you have confirmed that the
> > > package is identical to that shown in the datasheet for the LU0977M140
> > > at http://www.lumics.com/download/LU0977M140-2.pdf). The output pulse
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