  Amplified spontaneous emission is usually treated as an incoherent noise
process. Recent theoretical and experimental work using rephasing optical
pulses has shown that rephased amplified spontaneous emission (RASE) is a
potential source of wide bandwidth time-delayed entanglement. Due to poor echo
efficiency the plain RASE protocol doesn't in theory achieve perfect
entanglement. Experiments done to date show a very small amount of entanglement
at best. Here we show that rephased amplified spontaneous emission can, in
principle, produce perfect multimode time-delayed two mode squeezing when the
active medium is placed inside a Q-switched cavity.
