All-fiber ring resonators using ultra low loss directional couplers have been fabricated with finesse as high as 500. Resonator finesse is no longer limited by coupler loss and can be increased by lowering fiber loop loss. New polarization effects in the resonator have been observed indicating polarization dependent coupling in the directional coupler.

Date Published: 4 October 1984
PDF: 6 pages
Proc. SPIE 0487, Physics of Optical Ring Gyros, (4 October 1984);

Published in SPIE Proceedings Vol. 0487:
Physics of Optical Ring Gyros
Stephen F. Jacobs; Joseph E. Killpatrick; Virgil E. Sanders; Murray Sargent III; Marlan O. Scully; James H. Simpson, Editor(s)