Abstract
Stabilizing the resonance frequency of an optical cavity was achieved to obtain a reference signal for the
399-nm light source used for collimating a Yb atomic beam. We attempted cavity control to compensate
for laser power by dividing the transmitted light intensity of the cavity by the monitor signal intensity of
an incident optical power. As a result, the stability of the resonance frequency for 780-nm light was
almost 0.5 MHz, which continued for more than 2 hours. This stabilization was maintained until the
incident optical power was decreased to 10% of the initial power. With our technique, highly stable 399-
nm light is expected to be generated which enables us to achieve high-performance atomic
nanofabrication using Yb atoms.
