VECSEL systems for quantum information processing with trapped beryllium ions

Abstract

Two vertical-external-cavity surface-emitting laser (VECSEL) systems producing ultraviolet (UV) radiation at 235 nm and 313 nm are demonstrated. The systems are suitable for quantum information processing applications with trapped beryllium ions. Each system consists of a compact, single-frequency, continuous-wave VECSEL producing high-power near-infrared light, tunable over tens of nanometers. One system generates 2.4 W at 940 nm, using a gain mirror based on GaInAs/GaAs quantum wells, which is converted to 54 mW of 235 nm light for photoionization of neutral beryllium atoms. The other system uses a novel gain mirror based on GaInNAs/GaAs quantum-wells, enabling wavelength extension with manageable strain in the GaAs lattice. This system generates 1.6 W at 1252 nm, which is converted to 41 mW of 313 nm light that is used to laser cool trapped ${}^9$Be${}^{+}$ ions and to implement quantum state preparation and detection. The 313 nm system is also suitable for implementing high-fidelity quantum gates, and more broadly, our results extend the capabilities of VECSEL systems for applications in atomic, molecular, and optical physics.

8 pages, 7 figures

References in corpus (6)

• Errors in trapped-ion quantum gates due to spontaneous photon scattering
• Tunable spin-spin interactions and entanglement of ions in separate wells
• Watt-level blue light for precision spectroscopy, laser cooling and trapping of strontium and cadmium atoms
• Intra-Cavity Frequency-Doubled VECSEL System for Narrow Linewidth Rydberg EIT Spectroscopy
• Versatile control of ${}^9$Be${}^{+}$ ions using a spectrally tailored UV frequency comb
• Third-harmonic-generation of a diode laser for quantum control of beryllium ions

Cited by in corpus (1)

• Tutorial on laser locking techniques and the manufacturing of vapor cells for spectroscopy