title: Length control of an optical resonator using second-order transverse modes.
abstract: We present the analysis of an unorthodox technique for locking a laser to a resonant optical cavity. Error signals are derived from the interference between the fundamental cavity mode and higher-order spatial modes of order two excited by mode mismatch. This scheme is simple, inexpensive, and, in contrast to similar techniques, first-order insensitive to beam jitter. After mitigating sources of technical noise, performance is fundamentally limited by quantum shot noise.
authors: John
authors: J
authors: Miller
authors: Matthew
authors: M
authors: Evans