Record breaking photo detector captures light in just 125 picoseconds

Slow as molasses. I had <20 ps edges from my antenna-coupled tunnel junctions 20 years ago.

Plus it seems to be a narrowband pyroelectric, which has usability problems due to being intrinsically AC coupled.

Fun project though.

Cheers

Phil Hobbs

Phil Hobbs snipped-for-privacy@electrooptical.net wrote: |-------------------------------------------------------------------| |"Jan Panteltje snipped-for-privacy@comet.invalid wrote: | |> From: | |>

Dear Doctor Hobbs, Bah! I work on an area of gamma-ray astronomy with a proposed standard measurment taking some 10**6 seconds (i.e. nearly

Cheers :) (S.

That’s even longer than it took me to document the sub-20 ps response, which was limited by my Tek 11801C sampling scope. I was using a lamp-pumped pulsed Nd:YAG, 20 ps @20 Hz, driving a seeded optical parametric generator and difference frequency generator, which was continuously tunable from 400 nm to 10 microns with a couple of narrow gaps. A beautiful thing, but all that stuff going on meant that it had a pulse to pulse variation of about plus or -10%.

Sampling scopes give you one point per trigger, so one trace took 25.6 seconds, and averaging 100 traces to control the noise took that up to over

So I feel your pain. ;)

Cheers

Phil Hobbs

I was just going to say, talk to Phil, he can do that a lot faster :-)