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We investigate the pump efficiency of silicon vacancy-related spins in silicon carbide. For a crystal inserted into a microwave cavity with a resonance frequency of 9.4 GHz, the spin population inversion factor of 75 with the saturation…

Materials Science · Physics 2018-05-09 M. Fischer , A. Sperlich , H. Kraus , T. Ohshima , G. V. Astakhov , V. Dyakonov

Robust laser delivery and stabilization are key components in atom-based quantum technologies, such as quantum computing. Moving these technologies towards product-like deployment requires scalable, compact, cost-effective, and upgradable…

Broadband wavelength tuneability can ensure a new level of versatility for laser systems and extend areas of their applications. Principle limitations of achieving wide tuning wavelength ranges are generally defined by the spectral…

Short intense laser pulses are routinely used to induce rotational wave packet dynamics of molecules. Ro-vibrational wave packet dynamics has been explored comparatively infrequently, focusing predominantly on extremely light and rigid…

Quantum Gases · Physics 2024-11-12 D. Blume , Q. Guan , J. Kruse , M. Kunitski , R. Doerner

We investigate the creation of squeezed states of a vibrating membrane or a movable mirror in an opto-mechanical system. An optical cavity is driven by squeezed light and couples via radiation pressure to the membrane/mirror, effectively…

Quantum Physics · Physics 2009-06-30 K. Jaehne , C. Genes , K. Hammerer , M. Wallquist , E. S. Polzik , P. Zoller

We report a new type of vulnerability in practical implementations of quantum key distribution systems. We show that it is possible to increase the pulse energy of a source laser diode not only by injection-locking it by external light near…

Quantum Physics · Physics 2025-10-31 Maxim Fadeev , Anastasiya Ponosova , Qingquan Peng , Anqi Huang , Roman Shakhovoy , Vadim Makarov

We perform a comprehensive study of stability of a pumped atom laser in the presence of pumping, damping and outcoupling. We also introduce a realistic feedback scheme to improve stability by extracting energy from the condensate and…

Quantum Physics · Physics 2009-11-11 Mattias Johnsson , Simon Haine , Joseph J. Hope

We use a $^{87}\text{Rb}$ atomic vapor, suitable for an optically-pumped magnetometer (OPM) in Earth-field conditions, to study the noise properties of three strategies for generating pulsed optical pumping. We compare a frequency-modulated…

Laser beams carrying orbital angular momentum (OAM) provide an additional degree of freedom and have found wide applications ranging from optical communications and optical manipulation to quantum information. The efficient generation and…

We prove an alternative pulsing mechanism based on power adiabatic evolution of pump in Tm-doped fiber laser. A pulsed laser technique, unlike Q-switching and gain-switching, is explored under the equilibrium between the stimulated emission…

Optics · Physics 2019-12-04 Fuyong Wang

We investigate the propagation and nonlinear self-focusing of TW power laser pulses that create 10-m-scale, highly homogeneous plasma channels in rubidium vapor. Using computational solutions of the relevant propagation equations, we study…

Atomic Physics · Physics 2026-04-27 Gabor Demeter

Pumps are transport mechanisms in which direct currents result from a cyclic evolution of the potential. As Thouless has shown, the pumping process can have topological origins, when considering the motion of quantum particles in spatially…

Precision atomic and quantum experiments rely on ultra-stable narrow linewidth lasers constructed using table-top ultra-low expansion reference cavities. These experiments often require multiple lasers, operating at different wavelengths,…

The work was aimed to generate random laser emissions simultaneously at two wavelengths in a weakly scattering system containing mixture of binary dyes, rhodamine-B (Rh-B) and oxazine-170 (O-170) dispersed with ZnO nano-particles served as…

Optics · Physics 2016-08-29 Sunita Kedia , Sucharita Sinha

Optical spectroscopy of atoms and molecules is a field where one usually operates very far from thermal equilibrium conditions. A prominent example is spectroscopy of thin vapors, where the pump irradiation leads to a non equilibrium…

Though the performance of room-temperature masers has improved over the last decade, relatively little attention has been paid to the optics used to pump the maser's gain medium. In this work, we investigate a novel multi-blade optical…

Optics · Physics 2026-01-12 Mingyang Liu , Zike Cheng , Ziqiu Huang , Yifan Yu , Michael Newns , Mark Oxborrow

We present a simple, robust, narrow-linewidth, frequency-doubled semiconductor laser source suitable for laser cooling and repumping of $^9$Be$^+$ ions. A distributed Bragg reflector (DBR) laser diode operating at 626 nm is…

Instrumentation and Detectors · Physics 2018-11-14 Steven A. King , Tobias Leopold , Premjith Thekkeppatt , Piet O. Schmidt

Nonstationary pulse regimes associated with self modulation of a Kerr-lens modelocked Ti:sapphire laser have been studied experimentally and theoretically. Such laser regimes occur at an intracavity group delay dispersion that is smaller or…

We study the control of quantum resonances in photonic crystals with electromagnetically induced transparency driven by microwave field. In addition to the control laser, the intensity and phase of the maser can alter the transmission and…

Atomic Physics · Physics 2015-06-05 Pankaj K. Jha , C. Y. Lee , C. H. Raymond Ooi

This work reports single-frequency laser oscillation at 1003.4 nm of an optically pumped external cavity semiconductor laser. By using a gain structure bonded onto a high conductivity substrate, we demonstrate both theoretically and…