  Optical noon states (|N,0> + |0,N>) are an important resource for
Heisenberg-limited metrology and quantum lithography. The only known methods
for creating noon states with arbitrary $N$ via linear optics and projective
measurments seem to have a limited range of application due to imperfect phase
control. Here, we show that bootstrapping techniques can be used to create
high-fidelity noon states of arbitrary size.
