Abstract
This paper describes the investigation of the frequency stability of tilt locking, a technique which derives an error signal for locking a laser to an optical cavity by use of spatial-mode interference. By independently locking two lasers to the same optical cavity and measuring the beat frequency, a direct measurement of the stability of tilt locking was obtained. The beatnote exhibited a normal Allan deviation of 3.3 Hz over a time interval of 100 ms, yeilding a relative frequency stability of 1.3 × 10-14. This result implies at least a fractional locking stability of 1.3 × 10-14. Moreover, this stability was limited by fluctuations in the cavity spacer length and not the tilt-locking technique.
Original language | English |
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Pages (from-to) | 1521-1528 |
Number of pages | 8 |
Journal | IEEE Journal of Quantum Electronics |
Volume | 38 |
Issue number | 11 |
DOIs | |
Publication status | Published - Nov 2002 |