scholarly journals Raman-Laser System for Absolute Gravimeter Based On 87Rb Atom Interferometer

Photonics ◽  
2020 ◽  
Vol 7 (2) ◽  
pp. 32
Author(s):  
Yang Zhao ◽  
Shaokai Wang ◽  
Wei Zhuang ◽  
Tianchu Li
Keyword(s):  
Pulse Sequence ◽  
Laser System ◽  
Servo System ◽  
Raman Laser ◽  
Atom Interferometer ◽  
Absolute Gravimeter ◽  
87Rb Atom ◽  
Master Laser ◽  
Fourier Frequency ◽  
Raman Lasers

The paper describes a Raman-laser system with high performance for an absolute gravimeter that was based on 87Rb atom interferometer. As our gravimeter is a part of the standard acceleration of gravity of China, the Raman lasers’ characteristics should be considered. This laser system includes two diode lasers. The master laser is frequency locked through the frequency-modulation (FM) spectroscopy technology. Its maximum frequency drift is better than 50 kHz in 11 h, which is measured by home-made optical frequency comb. The slave laser is phase locked to the master laser with a frequency difference of 6.8346 GHz while using an optical phase lock loop (OPLL). The phase noise is lower than −105 dBc/Hz at the Fourier frequency from 200 Hz to 42 kHz. It is limited by the measurement sensitivity of the signal source analyzer in low Fourier frequency. Furthermore, the power fluctuation of Raman lasers’ pulses is also suppressed by a fast power servo system. While using this servo system, Raman lasers’ pulses could be fast re-locked while its fast turning on again in the pulse sequence. The peak value fluctuation of the laser power pulses is decreased from 25% to 0.7%, which is improved over 35 times. This Raman-laser system can stably operate over 500 h, which is suited for long-term highly precise and accurate gravity measurements.

Design of Laser System for Absolute Gravimeter Based on 87Rb Atom Interferometer

2015 ◽  
Vol 52 (9) ◽  
pp. 091406
Author(s):  
赵阳 Zhao Yang ◽  
王少凯 Wang Shaokai ◽  
庄伟 Zhuang Wei ◽  
房芳 Fang Fang ◽  
李天初 Li Tianchu
Keyword(s):  
Laser System ◽  
Atom Interferometer ◽  
Absolute Gravimeter ◽  
87Rb Atom

Design of laser system for absolute gravimeter based on87Rb atom interferometer

2015 ◽  
Author(s):  
Yang Zhao ◽  
Shaokai Wang ◽  
Wei Zhuang ◽  
Fang Fang ◽  
Tianchu Li
Keyword(s):  
Laser System ◽  
Atom Interferometer ◽  
Absolute Gravimeter

scholarly journals Multifunctional Optical Crystals for All-Solid-State Raman Lasers

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 114
Author(s):  
Hui Zhao ◽  
Shibo Dai ◽  
Siqi Zhu ◽  
Hao Yin ◽  
Zhen Li ◽  
...  
Keyword(s):  
Solid State ◽  
Continuous Wave ◽  
Frequency Doubling ◽  
Raman Laser ◽  
Rare Earth Ions ◽  
Excellent Performance ◽  
The Past ◽  
Raman Lasers ◽  
Optical Crystals ◽  
Laser Crystals

In the past few decades, the multifunctional optical crystals for all-solid-state Raman lasers have been widely studied by many scholars due to their compactness, convenience and excellent performance. In this review, we briefly show two kinds of multifunctional Raman crystals: self-Raman (laser and Raman effects) crystals and self-frequency-doubled Raman (frequency-doubling and Raman effects) crystals. We firstly introduce the properties of the self-Raman laser crystals, including vanadate, tungstate, molybdate and silicate doped with rare earth ions, as well as self-frequency-doubled Raman crystals, including KTiOAsO4 (KTA) and BaTeMo2O9 (BTM). Additionally, the domestic and international progress in research on multifunctional Raman crystals is summarized in the continuous wave, passively Q-switched, actively Q-switched and mode-locked regimes. Finally, we present the bottleneck in multifunctional Raman crystals and the outlook for future development. Through this review, we contribute to a general understanding of multifunctional Raman crystals.

Compact high power Raman laser system using phase-modulated sidebands amplified by a single tapered amplifier

CPEM 2010 ◽  
2010 ◽  
Author(s):  
K. S. Lee ◽  
S. E. Park ◽  
T. Y. Kwon ◽  
S. B. Lee ◽  
J. Kim
Keyword(s):  
High Power ◽  
Laser System ◽  
Raman Laser

The effects of the non-uniformity of Raman laser beams on an atom interferometer

2014 ◽  
Vol 68 (11) ◽  
Author(s):  
Bing Cheng ◽  
Zhaoying Wang ◽  
Bin Wu ◽  
Aopeng Xu ◽  
Qiyu Wang ◽  
...  
Keyword(s):  
Raman Laser ◽  
Atom Interferometer ◽  
Laser Beams

scholarly journals Integrated Raman Laser: A Review of the Last Two Decades

Micromachines ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 330 ◽  
Author(s):  
Maria Antonietta Ferrara ◽  
Luigi Sirleto
Keyword(s):  
Silicon Nanocrystals ◽  
Stimulated Raman Scattering ◽  
Raman Laser ◽  
Laser Source ◽  
Raman Gain ◽  
Research Activity ◽  
Nonlinear Waveguide ◽  
Raman Lasers ◽  
Impressive Result ◽  
First Time

Important accomplishments concerning an integrated laser source based on stimulated Raman scattering (SRS) have been achieved in the last two decades in the fields of photonics, microphotonics and nanophotonics. In 2005, the first integrated silicon laser based upon SRS was realized in the nonlinear waveguide. This breakthrough promoted an intense research activity addressed to the realization of integrated Raman sources in photonics microstructures, like microcavities and photonics crystals. In 2012, a giant Raman gain in silicon nanocrystals was measured for the first time. Starting from this impressive result, some promising devices have recently been realized combining nanocrystals and microphotonics structures. Of course, the development of integrated Raman sources has been influenced by the trend of photonics towards the nano-world, which started from the nonlinear waveguide, going through microphotonics structures, and finally coming to nanophotonics. Therefore, in this review, the challenges, achievements and perspectives of an integrated laser source based on SRS in the last two decades are reviewed, side by side with the trend towards nanophotonics. The reported results point out promising perspectives for integrated micro- and/or nano-Raman lasers.

scholarly journals Development of high-performance KrF and Raman laser facilities for inertial confinement fusion and other applications

1993 ◽  
Vol 11 (2) ◽  
pp. 331-346 ◽  
Author(s):  
M.J. Shaw ◽  
B. Edwards ◽  
G.J. Hirst ◽  
C.J. Hooker ◽  
M.H. Key ◽  
...  
Keyword(s):  
Power Systems ◽  
Inertial Confinement Fusion ◽  
High Performance ◽  
Short Pulse ◽  
High Reliability ◽  
Laser System ◽  
Raman Laser ◽  
Current Status ◽  
Inertial Confinement ◽  
Laser Amplifiers

This article describes the current status of the KrF development programme based on the Sprite laser system at the Rutherford Appleton Laboratory. High reliability and high shot rate have been demonstrated. Using a unique KrF-pumped Raman laser architecture, beam brightness exceeding 2×1019 Wcm-2 sterad-1 giving a focussed intensity >5 ×1017 Wcm-2 has been achieved. The development of transform-limited short-pulse oscillators is shown to be of importance in avoiding spectral broadening in air propagation of high-intensity beams. Beam smoothing of KrF beams in a multiplexed configuration has been demonstrated for the first time. The technique of echelon-free induced spatial incoherence has been shown to produce smooth intensity distributions in the far field, which remain essentially unchanged on amplification. The development of pulsed-power systems capable of exciting multikilojoule laser amplifiers for the next phase of development, the Supersprite system, is briefly discussed.

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