Abstract
Two hollow-cathode He–Cd lasers were frequency locked to gain maxima at 533, 537, and 441 nm while we simultaneously observed the beat between the 533- and 537-nm frequencies. The 100-sec Allan variance of the beat varied from 4.7 to 6.9 MHz over periods up to 50 min.
Original language | English |
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Pages (from-to) | 625-627 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 13 |
Issue number | 8 |
DOIs | |
Publication status | Published - 1988 |