scholarly journals Single-resonance optical pumping spectroscopy and application in dressed-state measurement with atomic vapor cell at room temperature

2010 ◽  
Vol 18 (13) ◽  
pp. 13554 ◽  
Author(s):  
Qiangbing Liang ◽  
Baodong Yang ◽  
Tiancai Zhang ◽  
Junmin Wang
Keyword(s):  
Room Temperature ◽  
Optical Pumping ◽  
Atomic Vapor ◽  
Vapor Cell ◽  
State Measurement ◽  
Dressed State

scholarly journals Measuring the Hyperfine Splitting and Deriving the Hyperfine Interaction Constants of the Cesium 5p67d 2D5/2 Excited State

2020 ◽  
Vol 10 (22) ◽  
pp. 8178
Author(s):  
Zerong Wang ◽  
Xiaokai Hou ◽  
Jiandong Bai ◽  
Junmin Wang
Keyword(s):  
Excited State ◽  
Hyperfine Interaction ◽  
Hyperfine Splitting ◽  
Room Temperature ◽  
Double Resonance ◽  
Interaction Constant ◽  
Probe Laser ◽  
Frequency Interval ◽  
Atomic Vapor ◽  
Vapor Cell

The measurement of the cesium (Cs) 5p67d2D5/2 excited state’s hyperfine splitting intervals and hyperfine interaction constants was experimentally investigated using a ladder-type (852 nm + 698 nm) three-level Cs system (5p66s2S1/2–5p66p2P3/2–5p67d2D5/2) with a room-temperature Cs atomic vapor cell. By scanning the 698 nm coupling laser’s frequency, the Doppler-free high-resolution electromagnetically-induced transparency (EIT)-assisted double-resonance optical pumping (DROP) spectra were demonstrated via transmission enhancement of the locked 852 nm probe laser. The EIT-assisted DROP spectra were employed to study the hyperfine splitting intervals for the Cs 5p67d2D5/2 excited state with a room-temperature Cs atomic vapor cell, and the radio-frequency modulation sideband of a waveguide-type electro-optic phase modulator (EOPM) was introduced for frequency calibration to improve the accuracy of frequency interval measurement. The existence of EIT makes the DROP spectral linewidth much narrower, and it is very helpful to significantly improve the spectroscopic resolution. Benefiting from the higher signal-to-noise ratio (SNR) and much better resolution of the EIT-assisted DROP spectra, the hyperfine splitting intervals between the hyperfine folds of (F” = 6), (F” = 5), and (F” = 4) of the Cs 5p67d2D5/2 state (HFS6″–5″ = −10.60(17) MHz and HFS5″–4″ = −8.54(15) MHz) were measured and, therefore, the magnetic dipole hyperfine interaction constant (A = −1.70(03) MHz) and the electrical quadrupole hyperfine interaction constant (B = −0.77(58) MHz) were derived for the Cs 5p67d2D5/2 state. These constants constitute an important reference value for an improvement of the precise measurement and determination of basic physical constants.

scholarly journals Optical switching of topological phase in a perovskite polariton lattice

2021 ◽  
Vol 7 (21) ◽  
pp. eabf8049
Author(s):  
Rui Su ◽  
Sanjib Ghosh ◽  
Timothy C. H. Liew ◽  
Qihua Xiong
Keyword(s):  
Optical Switching ◽  
Room Temperature ◽  
Optical Pumping ◽  
Optical Nonlinearity ◽  
Edge States ◽  
Ambient Conditions ◽  
Strong Light ◽  
Exciton Polaritons ◽  
Matter Interaction ◽  
Light Matter Interaction

Strong light-matter interaction enriches topological photonics by dressing light with matter, which provides the possibility to realize active nonlinear topological devices with immunity to defects. Topological exciton polaritons—half-light, half-matter quasiparticles with giant optical nonlinearity—represent a unique platform for active topological photonics. Previous demonstrations of exciton polariton topological insulators demand cryogenic temperatures, and their topological properties are usually fixed. Here, we experimentally demonstrate a room temperature exciton polariton topological insulator in a perovskite zigzag lattice. Polarization serves as a degree of freedom to switch between distinct topological phases, and the topologically nontrivial polariton edge states persist in the presence of onsite energy perturbations, showing strong immunity to disorder. We further demonstrate exciton polariton condensation into the topological edge states under optical pumping. These results provide an ideal platform for realizing active topological polaritonic devices working at ambient conditions, which can find important applications in topological lasers, optical modulation, and switching.

scholarly journals A pulsed-Laser Rb atomic frequency standard for GNSS applications

GPS Solutions ◽  
2021 ◽  
Vol 25 (3) ◽  
Author(s):  
S. Micalizio ◽  
F. Levi ◽  
C. E. Calosso ◽  
M. Gozzelino ◽  
A. Godone
Keyword(s):  
Optical Pumping ◽  
Frequency Standard ◽  
Frequency Stability ◽  
Allan Deviation ◽  
Rubidium Vapor ◽  
Vapor Cell ◽  
Continuous Regime ◽  
Remarkable Result ◽  
Averaging Time ◽  
Consequent Improvement

AbstractWe present the results of 10 years of research related to the development of a Rubidium vapor cell clock based on the principle of pulsed optical pumping (POP). Since in the pulsed approach, the clock operation phases take place at different times, this technique demonstrated to be very effective in curing several issues affecting traditional Rb clocks working in a continuous regime, like light shift, with a consequent improvement of the frequency stability performances. We describe two laboratory prototypes of POP clock, both developed at INRIM. The first one achieved the best results in terms of frequency stability: an Allan deviation of σy(τ) = 1.7 × 10−13 τ−1/2, being τ the averaging time, has been measured. In the prospect of a space application, we show preliminary results obtained with a second more recent prototype based on a loaded cavity-cell arrangement. This clock has a reduced size and exhibited an Allan deviation of σy(τ) = 6 × 10−13 τ−1/2, still a remarkable result for a vapor cell device. In parallel, an ongoing activity performed in collaboration with Leonardo S.p.A. and aimed at developing an engineered space prototype of the POP clock is finally mentioned. Possible issues related to space implementation are also briefly discussed. On the basis of the achieved results, the POP clock represents a promising technology for future GNSSs.

Room Temperature cw Operated Superluminescent Diodes for Optical Pumping of Nd: YAG Laser

1976 ◽  
Vol 15 (11) ◽  
pp. 2191-2194 ◽  
Author(s):  
Kuniakira Iwamoto ◽  
Isao Hino ◽  
Shohei Matsumoto ◽  
Koji Inoue
Keyword(s):  
Room Temperature ◽  
Optical Pumping ◽  
Yag Laser ◽  
Superluminescent Diodes

Dispersion of Rayleigh Scattering with a Multi-Prism Atomic Vapor Cell

2021 ◽  
Author(s):  
Anuj Rekhy ◽  
Boris S. Leonov ◽  
Amirhossein Abbasszadehrad ◽  
Richard B. Miles
Keyword(s):  
Rayleigh Scattering ◽  
Atomic Vapor ◽  
Vapor Cell

Isotope Selective Optical Pumping of Thallium Atoms in a Vapor Cell

2007 ◽  
Vol 51 (91) ◽  
pp. 327 ◽  
Author(s):  
Kwang-Hoon Ko ◽  
Do-Young Jeong ◽  
Hyunmin Park ◽  
Taek-Soo Kim ◽  
Gwon Lim ◽  
...  
Keyword(s):  
Optical Pumping ◽  
Vapor Cell

scholarly journals Modulation transfer spectroscopy in a lithium atomic vapor cell

2016 ◽  
Vol 24 (10) ◽  
pp. 10649 ◽  
Author(s):  
Dali Sun ◽  
Chao Zhou ◽  
Lin Zhou ◽  
Jin Wang ◽  
Mingsheng Zhan
Keyword(s):  
Atomic Vapor ◽  
Modulation Transfer ◽  
Vapor Cell
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