Doppler-free laser spectroscopy of atomic hydrogen using pulsed lasers
Doppler-free laser spectroscopy of atomic hydrogen using pulsed lasers
The lS1/2-2S1/2 transition frequency of atomic hydrogen has been measured by interferometric comparison with a reference line in 130Tea, tellurium. A dye laser, at 486nm was pulse amplified using a three-stage amplifier chain, transversely pumped with a Nd:YAG laser. The amplified light was spectrally filtered using a confocal interferometer and frequency doubled in area. The filter was frequency stabilised using an FM sideband technique to cw light acousto-optically upshifted in frequency to compensate for the 'amplifier shift'. Doppler- free two photon resonant, three photon ionization signals were detected. The value for the 1S1^2-2S1i2 transition frequency of 2466061407(9)MHz is in good agreement with the theoretical value of 2466061414.12(68)MHz. The lS1/2 Lamb shift can be inferred from this value and is 8180(9)MHz, agreeing within one standard deviation of other experiments and the theoretical value of 8172.94(9)MHz. Alternatively, a new value for the Rydberg constant of 109737.31542(40)cm~1 can be deduced. This value aiso agrees with the currently accepted value within one standard deviation. (DX84799)
University of Southampton
1988
Tolchard, John Michael
(1988)
Doppler-free laser spectroscopy of atomic hydrogen using pulsed lasers.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
The lS1/2-2S1/2 transition frequency of atomic hydrogen has been measured by interferometric comparison with a reference line in 130Tea, tellurium. A dye laser, at 486nm was pulse amplified using a three-stage amplifier chain, transversely pumped with a Nd:YAG laser. The amplified light was spectrally filtered using a confocal interferometer and frequency doubled in area. The filter was frequency stabilised using an FM sideband technique to cw light acousto-optically upshifted in frequency to compensate for the 'amplifier shift'. Doppler- free two photon resonant, three photon ionization signals were detected. The value for the 1S1^2-2S1i2 transition frequency of 2466061407(9)MHz is in good agreement with the theoretical value of 2466061414.12(68)MHz. The lS1/2 Lamb shift can be inferred from this value and is 8180(9)MHz, agreeing within one standard deviation of other experiments and the theoretical value of 8172.94(9)MHz. Alternatively, a new value for the Rydberg constant of 109737.31542(40)cm~1 can be deduced. This value aiso agrees with the currently accepted value within one standard deviation. (DX84799)
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Published date: 1988
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Local EPrints ID: 460906
URI: http://eprints.soton.ac.uk/id/eprint/460906
PURE UUID: fded882e-3c46-4c10-af5f-22d6583a9ca2
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Date deposited: 04 Jul 2022 18:31
Last modified: 04 Jul 2022 18:31
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Author:
John Michael Tolchard
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