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30 Hz-linewidth, diode-laser-pumped, Nd:GGG nonplanar ring oscillators by active frequency stabilisation

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5 Author(s)
Day, T. ; Edward L. Ginzton Lab., Stanford Univ., CA, USA ; Nilsson, A.C. ; Farinas, A.D. ; Gustafson, E.K.
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Reports a heterodyne linewidth of less than 30 Hz for the beatnote between the outputs of two 282 THz (1.062 mu m) Nd:GGG nonplanar ring oscillators (NPROs). The lasers were independently locked to adjacent axial modes of a high-finesse interferometer. The remnant frequency noise appears to be dominated by free spectra range fluctuations in the reference interferometer rather than by residual laser noise.

Published in:

Electronics Letters  (Volume:25 ,  Issue: 13 )