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

Abstract

We report on a low-noise diode laser oscillator at 972 nm actively stabilized to an ultra-stable 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 intra-cavity electro-optical modulator. The fractional power in the carrier reaches 99.9% which corresponds to a rms phase noise of ${\varphi }_{\text{rms}}^2=1{\text{mrad}}^2$ 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 2-photon processes.

3 pages, 5 figures

References in corpus (6)

• Sub-Hz line width diode lasers by stabilization to vibrationally and thermally compensated ULE Fabry-Perot cavities
• ${}^{87}$Sr lattice clock with inaccuracy below 10${}^{-15}$
• Spectroscopy of atomic hydrogen. How is the Rydberg constant determined?
• New Measurement of the 2S Hyperfine Interval in Atomic Hydrogen
• Phase-Locked, Low-Noise, Frequency Agile Titanium: Sapphire Lasers for Simultaneous Atom Interferometers
• Compact solid-state laser source for 1S-2S spectroscopy in atomic hydrogen

Cited by in corpus (7)

• Improved Measurement of the Hydrogen 1S - 2S Transition Frequency
• Simple phase noise measurement scheme for cavity-stabilized laser systems
• Yb fiber amplifier at 972.5 nm with frequency quadrupling to 243.1 nm
• Design of a Littrow-type diode laser with independent control of cavity length and grating rotation
• A compact ultranarrow high-power laser system for experiments with 578nm Ytterbium clock transition
• Sub-part-per-trillion test of the Standard Model with atomic hydrogen
• Compact, robust, and spectrally pure diode-laser system with a filtered output and a tunable copy for absolute referencing