  We propose a method for thermal expansion compensation of reference
monolithic optical cavities for laser frequency stabilization. Two schemes of
optical cavities are considered: a Fabry-Perot interferometer with a crimp ring
and a whispering-gallery-mode cavity with a clamp. In each scheme, thermal
expansion compensation is achieved due to the strained connection of the cavity
with an element made of a material with a high coefficient of thermal
expansion. The temperature region of the cavities' optical length stabilization
is estimated.
