UV laser beam switching system for Yb trapped ion quantum information processing

David R. Scherer; Joel M. Hensley; Krishnan R. Parameswaran; Douglas J. Bamford; Emily Mount; Stephen Crain; Jungsang Kim

doi:10.1117/12.906780

23 February 2012 UV laser beam switching system for Yb trapped ion quantum information processing

David R. Scherer, Joel M. Hensley, Krishnan R. Parameswaran, Douglas J. Bamford, Emily Mount, Stephen Crain, Jungsang Kim

Author Affiliations +

Proceedings Volume 8272, Advances in Photonics of Quantum Computing, Memory, and Communication V; 827219 (2012) https://doi.org/10.1117/12.906780
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

Qubits based on trapped ions are being investigated as a promising platform for scalable quantum information processing. One challenge associated with the scalability of such a multi-qubit trapped ion system is the need for an ultraviolet (UV) laser beam switching and control system to independently modulate and address large qubit arrays. In this work, we propose and experimentally demonstrate a novel architecture for a laser beam control system for trapped ion quantum computing based on fast electro-optic amplitude switching and high-fidelity electromechanical beam shuttering using a microelectromechanical systems (MEMS) deflector coupled into a single-mode optical fiber. We achieve a rise/fall time of 5 ns, power extinction of -31 dB, and pulse width repeatability of > 99.95% using an electrooptic switch based on a β-BaB₂O₄ (BBO) Pockels cell. A tilting MEMS mirror fabricated using a commercial foundry was used to steer UV light into a single-mode optical fiber, resulting in an electromechanical beam shutter that demonstrated a power extinction of -52 dB and a switching time of 2 μs. The combination of these two technologies allows for high-fidelity power extinction using a platform that does not suffer from temperature-induced beam steering due to changes in modulation duty cycle. The overall system is capable of UV laser beam switching to create the resolved sideband Raman cooling pulses, algorithm pulses, and read-out pulses required for quantum computing applications.

Citation Download Citation

David R. Scherer, Joel M. Hensley, Krishnan R. Parameswaran, Douglas J. Bamford, Emily Mount, Stephen Crain, and Jungsang Kim "UV laser beam switching system for Yb trapped ion quantum information processing", Proc. SPIE 8272, Advances in Photonics of Quantum Computing, Memory, and Communication V, 827219 (23 February 2012); https://doi.org/10.1117/12.906780

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KEYWORDS

Microelectromechanical systems

Ions

Ultraviolet radiation

Mirrors

Crystals

Switching

Switches

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