Watt-level blue light for precision spectroscopy, laser cooling and trapping of strontium and cadmium atoms

Abstract

High-power and narrow-linewidth laser light is a vital tool for atomic physics, being used for example in laser cooling and trapping and precision spectroscopy. Here we produce Watt-level laser radiation at 457.49 nm and 460.86 nm of respective relevance for the cooling transitions of cadmium and strontium atoms. This is achieved via the frequency doubling of a kHz-linewidth vertical-external-cavity surface-emitting laser (VECSEL), which is based on a novel gain chip design enabling lasing at > 2 W in the 915-928 nm region. Following an additional doubling stage, spectroscopy of the ${}^1{S}_0\to {}^1{P}_1$ cadmium transition at 228.89 nm is performed on an atomic beam, with all the transitions from all eight natural isotopes observed in a single continuous sweep of more than 4 GHz in the deep ultraviolet. The absolute value of the transition frequency of Cd-114 and the isotope shifts relative to this transition are determined, with values for some of these shifts provided for the first time

14 pages, 5 figures, 2 tables

References in corpus (5)

• Atom interferometry with the Sr optical clock transition
• Large Momentum Transfer Clock Atom Interferometry on the 689 nm Intercombination Line of Strontium
• A compact and efficient strontium oven for laser-cooling experiments
• Magneto-optical Trapping of Cadmium
• Watt-level single-frequency tunable Neodymium MOPA fiber laser operating at 915-937 nm

Cited by in corpus (10)

• Isotope Shifts in Cadmium as a Sensitive Probe for Physics Beyond the Standard Model
• Efficient chip-based optical parametric oscillators from 590 nm to 1150 nm
• High-resolution isotope-shift spectroscopy of Cd I
• Intra-Cavity Frequency-Doubled VECSEL System for Narrow Linewidth Rydberg EIT Spectroscopy
• High power continuous laser at 461 nm based on a compact and high-efficiency frequency-doubling linear cavity
• 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
• Low Duty Cycle Pulsed UV Technique for Spectroscopy of Aluminum Monochloride
• Laser-cooling Cadmium Bosons and Fermions with Near Ultraviolet Triplet Excitations
• Watt-class injection-locked diode laser system at 399 nm for atomic physics
• Frequency stabilization via interference between transmitted and reflected lights from a reference cavity