Abstract

Direct-frequency measurements have been extended into the visible region of the electromagnetic spectrum. The visible frequencies were synthesized by generating the second harmonic of the recently measured 260-THz 20Ne, 1.15-μm laser with a LiNbO3 crystal. The absolute frequencies of ten hyperfine components of 127I2 near 520 THz are reported.

© 1979 Optical Society of America

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References

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  1. J. L. Hall, IEEE J. Quantum Electron. QE-4, 638 (1968).
    [CrossRef]
  2. D. A. Jennings, F. R. Petersen, K. M. Evenson, Opt. Lett. 4, 129 (1979).
    [CrossRef] [PubMed]
  3. A paper giving full details of this laser is in preparation by G. R. Hanes.
  4. The authors wish to thank K. H. Hart of NRC, Ottawa, for this wavelength value.
  5. Using the value c = 299 792 458 m/sec recommended in BIPM, Comptes Rendus des Seances de la Conf. Gen. des Poids et Mesures, 15th, p. 103, 1975.

1979

1975

Using the value c = 299 792 458 m/sec recommended in BIPM, Comptes Rendus des Seances de la Conf. Gen. des Poids et Mesures, 15th, p. 103, 1975.

1968

J. L. Hall, IEEE J. Quantum Electron. QE-4, 638 (1968).
[CrossRef]

Comptes Rendus des Seances de la Conf. Gen. des Poids et Mesures

Using the value c = 299 792 458 m/sec recommended in BIPM, Comptes Rendus des Seances de la Conf. Gen. des Poids et Mesures, 15th, p. 103, 1975.

IEEE J. Quantum Electron.

J. L. Hall, IEEE J. Quantum Electron. QE-4, 638 (1968).
[CrossRef]

Opt. Lett.

Other

A paper giving full details of this laser is in preparation by G. R. Hanes.

The authors wish to thank K. H. Hart of NRC, Ottawa, for this wavelength value.

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Figures (1)

Fig. 1
Fig. 1

Optical layout of composite cavity laser to produce saturated absorption in I2 at twice the He–Ne frequency of 260 THz (1.15 μm).

Tables (1)

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Table 1 Differences between the 127I2, 17-1, P(62) Hyperfine Components, α, and the Second-Harmonic of the Lamb-Dip Stabilized 20Ne, 1.15-μm Laser

Equations (3)

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f α = 2 [ f Ne + ( f α / 2 - f Ne ) ] .
f o / 2 - f Ne = 154.3 MHz ,
f o = 2 [ f Ne + ( f o / 2 - f Ne ) ] = 520 206 837 ± 60 MHz .

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