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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 36, Iss. 21 — Nov. 1, 2011
  • pp: 4299–4301

Low phase noise diode laser oscillator for 1S–2S spectroscopy in atomic hydrogen

N. Kolachevsky, J. Alnis, C. G. Parthey, A. Matveev, R. Landig, and T. W. Hänsch  »View Author Affiliations

Optics Letters, Vol. 36, Issue 21, pp. 4299-4301 (2011)

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We report on a low-noise diode laser oscillator at 972 nm actively stabilized to an ultrastable vibrationally and thermally compensated reference cavity. To increase the fraction of laser power in the carrier we designed a 20 cm long external cavity diode laser with an intracavity electro-optical modulator. The fractional power in the carrier reaches 99.9%, which corresponds to an rms phase noise of φ rms 2 = 1 mrad 2 in 10 MHz bandwidth. Using this oscillator, we recorded 1S–2S spectra in atomic hydrogen and have not observed any significant loss of the excitation efficiency due to phase noise multiplication in the three consecutive two-photon processes.

© 2011 Optical Society of America

OCIS Codes
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(140.2020) Lasers and laser optics : Diode lasers
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:
Lasers and Laser Optics

Original Manuscript: September 6, 2011
Manuscript Accepted: September 18, 2011
Published: November 1, 2011

N. Kolachevsky, J. Alnis, C. G. Parthey, A. Matveev, R. Landig, and T. W. Hänsch, "Low phase noise diode laser oscillator for 1S–2S spectroscopy in atomic hydrogen," Opt. Lett. 36, 4299-4301 (2011)

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