  Microresonator based optical frequency combs (MFC) have demonstrated promise
in extending the capabilities of optical frequency combs. Here we demonstrate
all optical stabilization of a low noise temporal soliton based MFC in a
crystalline resonator via a new technique to control the repetition rate. This
is accomplished by thermally heating the microresonator with an additional
probe laser coupled to an auxiliary optical resonator mode. The offset
frequency is controlled by stabilization of the pump laser frequency to a
reference optical frequency comb. We analyze the stabilization by performing an
out of loop comparison and measure the overlapping Allan deviation. This all
optical stabilization technique can prove useful as a low added noise actuator
for self-referenced microresonator frequency combs.
