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Laser cooling of atoms usually necessitates several laser frequencies. Alkaline atoms, for example, are cooled by two lasers with a frequency difference in the Gigahertz range. This gap cannot be closed with simple shifting techniques.…

Atomic Physics · Physics 2013-09-03 Jan Mahnke , Sascha Kulas , Ilka Geisel , Stefan Jöllenbeck , Wolfgang Ertmer , Carsten Klempt

We report on a passively mode-locked Tm, Ho:CLNGG laser operating at 2090 nm, pumped by a multimode fiber-coupled 793 nm laser diode, representing the first demonstration of an affordable diode-pumped sub-100-fs mode-locked laser in the…

Optics · Physics 2023-11-21 A. Suzuki , Y. Wang , S. Tomilov , Z. Pan , C. J. Saraceno

We present experimental results demonstrating controllable dispersion in a ring laser by monitoring the lasing-frequency response to cavity-length variations. Pumping on an N-type level configuration in ${}^{87}$Rb, we tailor the…

We systematically study the influence of amplitude modulation on the steady-state bosonic squeezing and entanglement in a dissipative three-mode optomechanical system, where a vibrational mode of the membrane is coupled to the left and…

Quantum Physics · Physics 2018-05-15 Chang-Geng Liao , Hong Xie , Xiao Shang , Zhi-Hua Chen , Xiu-Min Lin

The stabilization and manipulation of laser frequency by means of an external cavity are nearly ubiquitously used in fundamental research and laser applications. While most of the laser light transmits through the cavity, in the presence of…

Laser cooling of molecules employing broadband optical pumping involves a timescale separation between laser excitation and spontaneous emission. Here, we optimize the optical pumping step using shaped laser pulses. We derive two…

Quantum Physics · Physics 2013-12-24 Daniel M. Reich , Christiane P. Koch

We have constructed and modeled a simple and efficient source of slow atoms. From a background vapour loaded magneto-optical trap, a thin laser beam extracts a continuous jet of cold rubidium atoms. In this setup, the extraction column that…

Atomic Physics · Physics 2009-11-07 W. Wohlleben , F. Chevy , K. Madison , J. Dalibard

Gaseous ammonia has previously been demonstrated as a compelling gain medium for a quantum cascade laser pumped molecular laser (QPML), exhibiting good power efficiency but limited tunability. Here we explore the potential of the ammonia…

Nonlinear selective reflection from the interface YAG window-high density rubidium vapor in the high-temperature cell is studied at the transition 5S$_{1/2}$-5P$_{3/2}$. In the experiment tunable pump and probe lasers are used. The…

Atomic Physics · Physics 2024-07-10 V. A. Sautenkov , S. A. Saakyan , A. A. Bobrov , B. B. Zelener

The long-term lasing dynamics of Brillouin Fiber Lasers was recently shown to be governed by an intrinsic thermal feedback which stabilizes the lasing frequency at the lower half of the gain line. We show that this feedback can be utilized…

Optics · Physics 2018-05-17 Omer Kotlicki , Jacob Scheuer

We developed a high-power laser system at a wavelength of 399 nm for laser cooling of ytterbium atoms with ultraviolet laser diodes. The system is composed of an external cavity laser diode providing frequency stabilized output at a power…

Atomic Physics · Physics 2016-02-17 Toshiyuki Hosoya , Martin Miranda , Ryotaro Inoue , Mikio Kozuma

External-cavity diode lasers are ubiquitous in atomic physics and a wide variety of other scientific disciplines, due to their excellent affordability, coherence length and versatility. However, for higher power applications, the…

Instrumentation and Detectors · Physics 2021-07-08 Andrew Daffurn , Rachel F. Offer , Aidan S. Arnold

We demonstrate an effective control of nonlinear interactions of lasing modes in a semiconductor microdisk cavity by shaping the pump profile. A target mode is selected at the expense of its competing modes either by increasing their lasing…

Optics · Physics 2016-02-18 Seng Fatt Liew , Li Ge , Brandon Redding , Glenn S. Solomon , Hui Cao

Simultaneous strong coherent pumping of the two transitions of a V-level atom with very differentdecay rates has been predicted to create almost perfect inversion on the narrower transition. Usingthe example of the blue and red transitions…

Quantum Physics · Physics 2021-02-03 Christoph Hotter , David Plankensteiner , Helmut Ritsch

In the optical pumping systems based on the pump-probe arrangement, the spin polarization of the atoms is generally monitored utilizing the probe laser beam, in which way an extra perturbation must be introduced and thus affects the normal…

Atomic Physics · Physics 2017-02-09 Jiancheng Fang , Rujie Li , Lihong Duan , Wenfeng Fan , Liwei Jiang

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

Liquid dye lasers have long been considered as ideal tunable laser sources in the visible range but are bulky, expensive, and require a complex system for dye circulation. Here, we present a system that relies on a low-cost blue laser diode…

Optics · Physics 2022-03-31 A. Hamja , R. Florentin , S. Chénais , Sebastien Forget

(Pseudo) radiative pumprate of OH 1612 MHz masers is defined for a sample of 44 OH/IR sources (infrared sources with OH 1612 MHz maser), irrespective of the real maser pumping mechanisms. The correlation between the (pseudo) maser pumprates…

Astrophysics · Physics 2007-05-23 J. H. He

The interaction of laser cooled and trapped atoms with resonant light is limited by the linewidth of the excited state of the atom. Another precise optical oscillator is an optical Fabry-P\'erot cavity. The combining of cold atoms with…

Optics · Physics 2017-09-19 Rahul Sawant , S. A. Rangwala

The work of Braginsky introduced radiation pressure dynamical backaction, in which a mechanical oscillator that is parametrically coupled to an electromagnetic mode can experience a change in its rigidity and its damping rate. The finite…

Quantum Physics · Physics 2017-06-16 L. D. Tóth , N. R. Bernier , A. K. Feofanov , T. J. Kippenberg