  We report the elliptically, close to circularly polarized lasing at
$\hbar\omega = 1.473$ and 1.522 eV from an AlAs/AlGaAs Bragg microcavity with
12 GaAs quantum wells in the active region and chiral-etched upper distributed
Bragg refractor under optical pump at room temperature. The advantage of using
the chiral photonic crystal with a large contrast of dielectric permittivities
is its giant optical activity, allowing to fabricate a very thin half-wave
plate, with a thickness of the order of the emitted light wavelength, and to
realize the monolithic control of circular polarization.
