There was a threat going on here at the E&W forum about isotropic radiators. It hasn't been active for a while. I was planning to construct one, but I haven't finished it and I don't intend to at the moment beeing.
Here is the link for that discussion:
<a href="http://www.roguesci.org/ubb/ultimatebb.php?ubb=get_topic;f=4;t=000396#000000" target="_blank">http://www.roguesci.org/ubb/ultimatebb.php?ubb=get_topic;f=4;t=000396#000000</a>

You can also check patents:
2,764,094
2,603,155
6,324,955

I had an idea, you probably know how the common military FAE work?
Otherwise check <a href="http://www.fas.org/man/dod-101/sys/dumb/fae.htm" target="_blank">http://www.fas.org/man/dod-101/sys/dumb/fae.htm</a> to update yourself.
Thease FAE:s use detonators to detonate the cloud formed and I have read patents covering chemicaly initiated ones. I was thinking of a light initiated one(thermobaric, FAE or a premixed fuel/oxygen mix).

If we start with an example,
imagine a cloud of C2H2/O2(say in the room you are sitting) , within that cloud an isotropic radiator.( C2H2/O2 mixtures are sensitive to UV radiation. Isotropic radiators emit plenty of UV radiation.) The isotropic radiator is detonated and all over the cloud molecules are hit by UV radiation, causing initiation instantly all over the cloud. If this work the entire cloud deflagrate/detonate almost instantly creating enormous force(atleast that's what my little brain is hoping).

I'm not sure this could be used in a FAE, using fuel dispersed by aburster charge, since the UV radiation would probably not reach very far in such a cloud(not necessary transparent) and and the intensity might not be sufficent depending on fuel. Another option is a secondary(thermobaric version), sensitive to UV radiation to the intensity given of by an isotropic radiator, but I'm not sure they even exist.

I started the discussion at sciencemadness so check,
<a href="http://www.sciencemadness.org/talk/viewthread.php?tid=199" target="_blank">http://www.sciencemadness.org/talk/viewthread.php?tid=199</a>
to see what has been said this far. I moved it here to get more ideas and comments on the subject.

<small>[ September 23, 2002, 12:38 PM: Message edited by: xoo1246 ]</small>

initiating the mix with 90%Mg 10%octogen does the same!
in our conditions
2*4 gas cans punctured with acetone peroxide or urea nitrate or other cool explosive. and detonated with 80%Al powder 20%nitroglycerine.
It really works and makes the blast 25% more powerful...
by the way, it is possible some asshole to post something idiotic with my nick, because here the computers block very often and i can not log off after working...

<small>[ October 18, 2002, 06:44 AM: Message edited by: simply RED ]</small>