High-power, frequency-quadrupled UV laser source resonant with the ${}^1$S${}_0$-${}^3$P${}_1$ narrow intercombination transition of cadmium at 326.2 nm

Abstract

We present a novel high-power, frequency-stabilized UV laser source at 326.2~nm, resonant with the Cd ${}^1$S${}_0$ - ${}^3$P${}_1$ narrow intercombination transition. We have achieved a maximum produced power of 1~W at 326.2~nm by two successive frequency doubling stages of a narrow-linewidth (< 1~kHz) seed laser at 1304.8~nm. About 3.4 W of optical power at 652.4 nm is produced by a visible Raman fiber amplifier (VRFA) that amplifies and generates the second harmonic of the infrared radiation. The visible light is subsequently frequency-doubled down to 326.2~nm in a non-linear bow-tie cavity using a Brewster-cut beta-barium-borate (BBO) crystal, with a maximum conversion efficiency of around 40$\%$ for 2.5~W coupled red power. Full characterization of the laser source, together with spectroscopy signals of all Cd isotopes, spanning more than 4 GHz in the UV, are shown.

arXiv comment7 pages, 5 figures

References in corpus (12)

• Evidence for Nonlinear Isotope Shift in Yb${}^{+}$ Search for New Boson
• A 750 mW, continuous-wave, solid-state laser source at 313 nm for cooling and manipulating trapped 9Be+ ions
• Narrow-line Cooling and Determination of Magic Wavelength of Cd
• Sr atom interferometry with the optical clock transition as a gravimeter and a gravity gradiometer
• A highly stable monolithic enhancement cavity for SHG generation in the UV
• Efficient Frequency Doubling at 399 nm
• Watt-level blue light for precision spectroscopy, laser cooling and trapping of strontium and cadmium atoms
• Reduction of laser intensity noise over 1 MHz band for single atom trapping
• Blackbody radiation shift for the ${}^1$S${}_0$--${}^3$P${}_0$ optical clock transition in zinc and cadmium atoms
• Development and characterization of a 2.2 W narrow-linewidth 318.6 nm ultraviolet laser
• Calculation of higher-order corrections to the light shift of the $5s^2{}^1{S}_0$--$5s5p{}^3{P}_0^o$ clock transition in Cd
• MCDHF-CI calculations for Hg and Cd with estimates for unknown clock transition frequencies

Cited by in corpus (3)

• Coherence-preserving cooling of nuclear spin qubits in a weak magnetic field
• A many-channel FPGA control system
• Laser-cooling Cadmium Bosons and Fermions with Near Ultraviolet Triplet Excitations