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The erbium-doped Lithium niobate on insulator (Er:LNOI) platform has great promise in the application of telecommunication, microwave photonics, and quantum photonics due to its excellent electro-optic, piezo-electric, nonlinear nature as…

Optics · Physics 2021-09-01 Zeyu Xiao , Kan Wu , Minglu Cai , Tieying Li , Jianping Chen

We describe the design and implementation of a stable high-power 1064 nm laser system to generate optical lattices for experiments with ultracold quantum gases. The system is based on a low-noise laser amplified by an array of four heavily…

Quantum Gases · Physics 2019-03-27 A. Mazurenko , S. Blatt , F. Huber , M. F. Parsons , C. S. Chiu , G. Ji , D. Greif , M. Greiner

High precision spectroscopy on the $2 \ ^3 S \rightarrow 2 \ ^1 S$ transition is possible in ultracold optically trapped helium but the accuracy is limited by the ac-Stark shift induced by the optical dipole trap. To overcome this problem,…

Atomic Physics · Physics 2018-04-19 R. J. Rengelink , R. P. M. J. W. Notermans , W. Vassen

Light from a Tm,Ho:YLF laser operating at 2051 nm is frequency doubled then coupled into a high Fabry-Perot cavity with manufacturer quoted finesse in excess of 300,000. The frequency of the laser is stabilized using the Pound-Drever-Hall…

Instrumentation and Detectors · Physics 2011-05-24 Adam Kleczewski , Matthew Hoffman , Eric Magnuson , Boris Blinov , Norval Fortson

Fiber-delay measurement is one of the key fundamental technologies in numerous fields. Here we propose and experimentally demonstrate a high-precision and concise optical time delay measurement system based on the technique of linear…

Optics · Physics 2023-12-19 Yufei Zhang , Ziyang Chen , Dongrui Yu , Jialin Niu , Xing Chen , Hong Guo

We present a continuous-wave, 810 nm laser with watt-level powers. Our system is based on difference-frequency generation of 532 nm and 1550 nm fiber lasers in a single pass through periodically poled lithium niobate (PPLN). We measure the…

Atomic Physics · Physics 2021-09-29 William J. Eckner , Aaron W. Young , Nathan Schine , Adam M. Kaufman

We apply optical pumping to prepare the lithium beam of our atom interferometer in a single hyperfine-Zeeman sublevel: we use two components of the D1-line for pumping the 7Li atoms in a dark state F,mF=+2 (or -2) sublevel. The optical…

Atomic Physics · Physics 2015-06-16 Jonathan Gillot , Alexandre Gauguet , Matthias Büchner , Jacques Vigué

To reach sub-picometer sensitivity in the millihertz range, displacement sensors based on laser interferometry require suppression of laser-frequency noise by several orders of magnitude. Many optical frequency stabilization methods exist…

We present two distinct ultra-low frequency noise lasers at 729 nm with a fast frequency noise of 30 Hz^2/Hz, corresponding to a Lorentzian linewidth of 0.1 kHz. The characteristics of both lasers, which are based on different types of…

We have performed high resolution spectroscopy of rubidium with a single mode continuous wave distributed feedback (DFB) laser diode. The saturation spectrum of the D_2-line of 85Rb and 87Rb was recorded with a resolution close to the…

Atomic Physics · Physics 2015-06-26 S. Kraft , A. Deninger , Ch. Truck , J. Fortagh , F. Lison , C. Zimmermann

We examine the passage of ultracold two-level atoms through two separated laser fields for the nonresonant case. We show that implications of the atomic quantized motion change dramatically the behavior of the interference fringes compared…

Quantum Physics · Physics 2009-11-13 D. Seidel , J. G. Muga

The femtosecond laser frequency comb has enabled the 21st century revolution in optical synthesis and metrology. A particularly compelling technique that relies on the broadband coherence of two laser frequency combs is dual-comb…

Optics · Physics 2023-07-19 Vicente Duran , Santiago Tainta , Victor Torres-Company

We realize a laser with a cloud of cold rubidium atoms as gain medium, placed in a low-finesse cavity. Three different regimes of laser emission are observed corresponding respectively to Mollow, Raman and Four Wave Mixing mechanisms. We…

Atomic Physics · Physics 2008-08-30 William Guerin , Franck Michaud , Robin Kaiser

We present a solid-state laser system that generates 750 mW of continuous-wave single-frequency output at 313 nm. Sum-frequency generation with fiber lasers at 1550 nm and 1051 nm produces up to 2 W at 626 nm. This visible light is then…

An experimental method is developed for the robust frequency stabilization using a high-finesse cavity when the laser exhibits large intermittent frequency jumps. This is accomplished by applying an additional slow feedback signal from…

Optics · Physics 2020-10-06 Won-Kyu Lee , Chang Yong Park , Myoung-Sun Heo , Dai-Hyuk Yu , Huidong Kim

Multiphoton microscopy has enabled us to image cellular dynamics in vivo. However, the excitation wavelength for imaging with commercially available lasers is mostly limited between 650-1040 nm. Here we develop a femtosecond fiber laser…

The frequency and phase fluctuations of free-running lasers limit the performance of optical heterodyne sub-THz systems - especially for low subcarrier spacing OFDM signals. Digital impairment compensation is implemented here for the…

Signal Processing · Electrical Eng. & Systems 2023-10-02 Amol Delmade , Alison Kearney , Simon Nellen , Robert B. Kohlhaas , Colm Browning , Martin Schell , Frank Smyth , Liam Barry

We demonstrate a dual wavelength optical frequency standard based on the dual optical transition modulation transfer spectroscopy (DOTMTS) between different quantum transitions of the rubidium D1 (795 nm) and D2 (780 nm) lines. In a single…

Optics · Physics 2024-11-05 Jie Miao , Jingming Chen , Deshui Yu , Qiaohui Yang , Duo Pan , Jingbiao Chen

Long ground-Rydberg coherence lifetime is interesting for implementing high-fidelity quantum logic gates, many-body physics, and other quantum information protocols. However, the potential well formed by a conventional far-off-resonance…

Optics · Physics 2023-01-23 Xiaokai Hou , Shou Liu , Xin Wang , Feifei Lu , Jun He , Junmin Wang

With Hg atoms confined in an optical lattice trap in the Lamb-Dicke regime, we obtain a spectral line at 265.6 nm in which the full-width at half-maximum is <15Hz. Here we lock an ultrastable laser to this ultranarrow clock transition and…

Atomic Physics · Physics 2016-04-20 J. J. McFerran , D. V. Magalhaes , C. Mandache , J. Millo , W. Zhang , Y. Le Coq , G. Santarelli , S. Bize