Status of the Vacuum Birefringence Search at BMV

We present the current status and outlook of the Biréfringence Mangetique du Vide (BMV) project. The BMV experiment is a polarimetric search for the QED predicted anisotropy of vacuum in the presence of external electromagnetic fields. The main challenge faced in this fundamental test is the measurement of polarization ellipticity on the order of 10
^-15
.