
TY  - JOUR
A1  - Stedman, GE 
A1  - Bilger, HR 
A1  - Ziyuan, Li 
A1  - Poulton, MP 
A1  - Rowe, CH 
A1  - Vetharaniam, I 
A1  - Wells, PV 
T1  - Canterbury Ring Laser and Tests for Nonreciprocal Phenomena
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1993
VL  - 46
IS  - 1
SP  - 87
EP  - 102
KW  - 
UR  - https://doi.org/10.1071/PH930087 
N2  - An historic and simple experiment has been revitalised through the availability of supercavity mirrors and also through a heightened interest in interferometry as a test of physical theory. We describe our helium-neon ring laser, and present results demonstrating a fractional frequency resolution of 2·1x10-18 (1·0 mHz in 474 THz). The rotation of the earth unlocks the counterrotating beams. A new field of spectroscopy becomes possible, with possible applications to geophysical measurements such as seismic events and earth tides, improved measurements of Fresnel drag, detection of ultraweak nonlinear optical propert~es of matter, and also searches for preferred frame effects in gravitation and for pseudoscalar particles. 
ER  -

