GaN laser diodes for cold-atom quantum sensors and optical atomic clocks

2021 ◽  
Author(s):  
Stephen P. Najda ◽  
Piotr Perlin ◽  
Tadek Suski ◽  
Szymon Stanczyk ◽  
Mike Leszczynski ◽  
...  
Keyword(s):  
Laser Diodes ◽  
Cold Atom ◽  
Atomic Clocks

Al-free active region laser diodes at 894 nm for compact Cesium atomic clocks

2015 ◽  
Author(s):  
N. Von Bandel ◽  
J. Bébé Manga Lobé ◽  
M. Garcia ◽  
A. Larrue ◽  
Y. Robert ◽  
...  
Keyword(s):  
Active Region ◽  
Laser Diodes ◽  
Atomic Clocks

scholarly journals Optical atomic phase reference and timing

2017 ◽  
Vol 375 (2099) ◽  
pp. 20160241 ◽  
Author(s):  
L. Hollberg ◽  
E. H. Cornell ◽  
A. Abdelrahmann
Keyword(s):  
Special Relativity ◽  
Real World ◽  
High Performance ◽  
Cold Atoms ◽  
Cold Atom ◽  
New Physics ◽  
Atomic Clocks ◽  
Commercial World ◽  
Commercial Applications ◽  
Quantum Technology

Atomic clocks based on laser-cooled atoms have made tremendous advances in both accuracy and stability. However, advanced clocks have not found their way into widespread use because there has been little need for such high performance in real-world/commercial applications. The drive in the commercial world favours smaller, lower-power, more robust compact atomic clocks that function well in real-world non-laboratory environments. Although the high-performance atomic frequency references are useful to test Einstein's special relativity more precisely, there are not compelling scientific arguments to expect a breakdown in special relativity. On the other hand, the dynamics of gravity, evidenced by the recent spectacular results in experimental detection of gravity waves by the LIGO Scientific Collaboration, shows dramatically that there is new physics to be seen and understood in space–time science. Those systems require strain measurements at less than or equal to 10 −20 . As we discuss here, cold atom optical frequency references are still many orders of magnitude away from the frequency stability that should be achievable with narrow-linewidth quantum transitions and large numbers of very cold atoms, and they may be able to achieve levels of phase stability, Δ Φ / Φ total  ≤ 10 −20 , that could make an important impact in gravity wave science. This article is part of the themed issue ‘Quantum technology for the 21st century’.

Advances in GaN laser diodes for quantum sensors and optical atomic clocks

2020 ◽  
Author(s):  
Stephen P. Najda ◽  
Piotr Perlin ◽  
Mike Leszczynski ◽  
Szymon Stanczyk ◽  
C. C. Clark ◽  
...  
Keyword(s):  
Laser Diodes ◽  
Atomic Clocks

scholarly journals Lateral grating DFB AlGaInN laser diodes for optical communications and atomic clocks.

2017 ◽  
Vol 810 ◽  
pp. 012053
Author(s):  
S P Najda ◽  
T Slight ◽  
P Perlin ◽  
O Odedina ◽  
T Suski ◽  
...  
Keyword(s):  
Optical Communications ◽  
Laser Diodes ◽  
Atomic Clocks

Results of very long time ageing tests of DFB ridge laser diodes emitting at 852 nm and 894 nm for Cesium atomic clocks

2018 ◽  
Author(s):  
Olivier Parillaud ◽  
Patrick Resneau ◽  
Nicolas von Bandel ◽  
Michel Garcia ◽  
Eric Vinet ◽  
...  
Keyword(s):  
Laser Diodes ◽  
Atomic Clocks ◽  
Long Time

DFB-ridge laser diodes at 894 nm for Cesium atomic clocks

2016 ◽  
Author(s):  
N. von Bandel ◽  
M. Garcia ◽  
M. Lecomte ◽  
A. Larrue ◽  
Y. Robert ◽  
...  
Keyword(s):  
Laser Diodes ◽  
Atomic Clocks

GaN laser technology for cold-atom quantum sensors and optical atomic clocks

2021 ◽  
Author(s):  
S.P. Najda ◽  
P. Perlin ◽  
T. Suski ◽  
S. Stanczyk ◽  
M. Leszczyński ◽  
...  
Keyword(s):  
Cold Atom ◽  
Atomic Clocks ◽  
Laser Technology

Al-Free Active Region DFB Laser Diodes operating at 894nm for compact Cesium Atomic Clocks

2016 ◽  
Author(s):  
N. Von Bandel ◽  
M. Myara ◽  
P. Signoret ◽  
A. Larrue ◽  
O. Parillaud ◽  
...  
Keyword(s):  
Active Region ◽  
Laser Diodes ◽  
Atomic Clocks ◽  
Dfb Laser

scholarly journals The Brazilian time and frequency atomic standards program

2008 ◽  
Vol 80 (2) ◽  
pp. 217-252 ◽  
Author(s):  
Mushtaq Ahmed ◽  
Daniel V. Magalhães ◽  
Aida Bebeachibuli ◽  
Stella T. Müller ◽  
Renato F. Alves ◽  
...  
Keyword(s):  
Atomic Beam ◽  
Atomic Clock ◽  
Cold Atom ◽  
Telecommunication Networks ◽  
Atomic Clocks ◽  
Major Advance ◽  
Optical Cooling ◽  
Global Positioning ◽  
Frequency Metrology

Cesium atomic beam clocks have been the workhorse for many demanding applications in science and technology for the past four decades. Tests of the fundamental laws of physics and the search for minute changes in fundamental constants, the synchronization of telecommunication networks, and realization of the satellite-based global positioning system would not be possible without atomic clocks. The adoption of optical cooling and trapping techniques, has produced a major advance in atomic clock precision. Cold-atom fountain and compact cold-atom clocks have also been developed. Measurement precision of a few parts in 10(15) has been demonstrated for a cold-atom fountain clock. We present here an overview of the time and frequency metrology program based on cesium atoms under development at USP São Carlos. This activity consists of construction and characterization of atomic-beam, and several variations of cold-atom clocks. We discuss the basic working principles, construction, evaluation, and important applications of atomic clocks in the Brazilian program.

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