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Absolute measurement of the diameter of a fused quartz hemisphere at 6 K (1989)

Tate, J. ; McIntyre, D. H. ; Cabrera, B.

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 60 (1989), S. 985-992

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ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: We have measured by interferometry the diameter of a fused-quartz hemispherical rotor to 200 nm, or an accuracy of 4 parts-per-million (ppm), at both room temperature and at liquid helium temperature. We placed the rotor in an optically contacted fused-quartz etalon, and used a continuous-wave dye laser to measure the lengths of the optical cavities. The laser frequency was referenced to Doppler-free absorption lines in molecular tellurium and molecular iodine. These measurements were done in order to determine the area of a superconducting ring used in a precision determination of h/me. Our results confirm earlier length measurements at room temperature performed by the National Bureau of Standards (NBS).

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1140291

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Digitale Medien

Optically stabilized diode laser using high-contrast saturated absorption (1994)

Cuneo, C. J. ; Maki, Jeffery J. ; McIntyre, D. H.

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 64 (1994), S. 2625-2627

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ISSN: 1077-3118

Quelle: AIP Digital Archive

Thema: Physik

Notizen: Doppler-free saturation spectroscopy in an optically thick atomic vapor is used in an optical-feedback stabilization system for a semiconductor diode laser. A portion of the 780 nm diode laser beam passes through a heated rubidium cell and is reflected back to the laser. The optical feedback causes the laser frequency to be stabilized to a hyperfine transition within the Rb D2 line. The linewidth of the laser is reduced by more than two orders of magnitude.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.111498

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