Detector Specifics
Depending on how old the radar detector is, it will definately pick up K band radiation (not sure of the exact frequency) and maybe even L/M if its a really old one. K band is used by gatso's and also by traffic signal detectors(they change when something comes close). The radar from the Airfield won't be picked up as this is well outside the frequency which your detector can pick up. The Gatso uses short Pulse repetition Frequency (PRF) and the ATC radars will be a lot longer in PRF in order to be able to detect signals from further away.
As far as the laser setector, it can be set off by Gas discharge headlights as these mimmic the laser light spectrum and can cheap detector can be fooled (by cheap I dont mean your detector is cheap but in comparison to military laser detection equipment it is) and also sunlight being focused of a car's paintwork or and glass object can also give false readings.
Out of curiuristy which detector have you got, as I have had a few in the last couple of years, I've also found ways to change the settings to make them more user friendly.
City mose if you have it, will fitler out all the traffic signal detectors and door openings.
Hope this is usefull. If anyone wnats to know more detail about the actuall frequencies I'll be able to give you the exact freq's of the bands (if your that desperate)
JEV