[Laser] My first experiments

[J. Forster]

>  Paul,
> Your first results show a very good RX  sensitivity.
> You will notice the plane positioning flash lamps can be heard  very far
> on  line of site or by cloud bouncing.
> [snip]

> 73  Yves

Xenon strobes have a WHOPPING line in the near IR (somewhere around 900 nm as I
remember). It is much easier to 'see' a Xenon strobe with a silicon photo diode
than with the human eye because the spectral line is near the sweet spot for
Silicon photo diodes.

-John