摘要
Simultaneous frequency and amplitude stabilization of a commercial internal-mirror He-Ne laser by a new simple method is reported. In this method, the back beam intensity of one polarization of the orthogonally polarized modes is fed back as a heater current to control the cavity length of the laser. The relative frequency stability and amplitude stability achieved are, respectively, ±2.5 X 10-9 and ±0.13% over a period of 1 h. © 1986 Optical Society of America.