Teaching physics with 670‐nm diode lasers—experiments with Fabry–Perot cavities

R. A. Boyd, J. L. Bliss, K. G. Libbrecht
1996 American Journal of Physics  
In a previous paper we described details of the construction of stabilized 670-nm diode lasers for use in undergraduate physics laboratories. We report here a series of experiments that can be performed using the 670-nm diode laser, a homemade scanning Fabry-Perot cavity, a helium-neon laser, a simple photodiode, and a few pieces of electronics hardware. The experiments include: 1) an introduction to the scanning confocal Fabry-Perot cavity, and to its use as an optical spectrum analyzer; 2)
more » ... er frequency modulation and observation of FM sidebands using the optical spectrum analyzer; and 3) the Pound-Drever method for servo-locking a Fabry-Perot cavity to a laser. These experiments are relatively easy to set up and perform, yet they demonstrate a number of useful optical principles and experimental techniques.
doi:10.1119/1.18330 fatcat:na4ohzzijnch5pa2m2q4eyu2ne