T violation and microhertz resolution in a ring laser

G. E. Stedman, M. T. Johnsson, Z. Li, C. H. Rowe, H. R. Bilger

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


A He–Ne ring laser has given the Earth-rotation-induced Sagnac frequency to a precision of 1 μ Hz, or 2 parts in 108, 2 × 10-21 of the laser frequency. Because the beat frequency in a ring laser originates in either timereversal or (with a more complicated polarization geometry) parity-violating effects, such systems have the potential of detecting ultrasmall symmetry violations.

Original languageEnglish
Pages (from-to)324-326
Number of pages3
JournalOptics Letters
Issue number3
Publication statusPublished - 1995
Externally publishedYes


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