| 摘要 |
1507847 Lasers UNIVERSITY OF UTAH 29 Aug 1975 [29 Aug 1974 11 June 1975] 35695/75 Heading H1C A rotational rate sensor comprises a ring laser 10 formed by one complete turn of a rotatable single optical fibre waveguide 12 extending from an Nd-doped active medium 14, the two oppositely directed beam components being extracted from the ring by an imperfect splice 16 for subsequent recombination by mirrors 20, 26 and a beam combiner 22. A photodiode 30 detects the heat frequency or fringe movement due to relative path length differences between the two beam components when the ring is rotated. |
