PENTAGONAL 2-LOOP RING INTERFEROMETER

Results of work on the assembly and adjustment of an original pentagon al, two-loop interferometer are reported; the interferometer is a pass ive version of a compact laser gravitational wave detector. It is show n that the correlative automatic noise-compensation system developed f or the project is capable of lowering the phase noise level in the res ultant signal channel of the detector by two orders of magnitude. (C) 1998 American Institute of Physics. [S1063-7842(98)02305-8].