  We demonstrate an on-chip lithium niobate micro-disk laser based on hydrogen
cyanide (H13C14N) gas saturation absorption method for frequency stabilization.
The laser chip consists of two main components: a micro-disk laser and a
combined racetrack ring cavity. By operating on the H13C14N P12 absorption line
at 1551.3 nm, the laser frequency can be precisely stabilized. The laser
demonstrates remarkable stability, achieving a best stability value of 9*10^-9.
Furthermore, the short-term stability, evaluated over continuous time intervals
of 35 seconds, showcases exceptional performance. Additionally, the residual
drift remains well below 30 MHz.
