An all-optical scalar and vector spin-exchange relaxation-free magnetometer employing on–off pump modulation

2011 ◽  
Vol 109 (7) ◽  
pp. 07E507 ◽  
Author(s):  
Alexander Gusarov ◽  
David Levron ◽  
Andrei Ben-Amar Baranga ◽  
Eugene Paperno ◽  
Reuben Shuker
Keyword(s):  
Spin Exchange ◽  
Off Pump ◽  
All Optical ◽  
Optical Scalar

scholarly journals Vector measurements using all optical scalar atomic magnetometers

2021 ◽  
Vol 129 (4) ◽  
pp. 044502
Author(s):  
Rui Zhang ◽  
Rahul Mhaskar ◽  
Ken Smith ◽  
Easswar Balasubramaniam ◽  
Mark Prouty
Keyword(s):  
All Optical ◽  
Optical Scalar

Influence of He Buffer Gas Pressure on Cs Atomic Polarizability

2013 ◽  
Vol 475-476 ◽  
pp. 173-176
Author(s):  
Qiang Liu ◽  
Yu Dan Sun ◽  
Yan Nan Zhuo ◽  
Jia Xing Wang ◽  
Tian Shu Fu
Keyword(s):  
Magnetic Field ◽  
Weak Magnetic Field ◽  
Spin Exchange ◽  
High Sensitivity ◽  
Buffer Gas ◽  
Pressure Broadening ◽  
Vapor Cell ◽  
Spin Relaxation Rate ◽  
All Optical ◽  
Atomic Polarizability

All optical cesium (Cs) atomic magnetometer with high sensitivity is an important technique to detect weak magnetic field. The Cs vapor cell is filled with He buffer gas to reduce spin relaxation rate. However the pressure of He also influences the Cs atomic polarizability due to pressure broadening effect. In this work, the principle of all optical Cs atomic magnetometer is analyzed. The rate equation is used to calculate Cs atomic polarizability as the pressure of He is about 100Torr and pure Cs vapor cell. The calculation shows that higher pressure of He buffer gas can decrease Cs atomic polarizability without considering spin-exchange collisions, as the pump beam frequency is locked to Cs D1 transition F=3F=4.

Ultra-sensitive all-optical comagnetometer with laser heating

2022 ◽  
Author(s):  
Tian Zhao ◽  
Ying Liu ◽  
kai wei ◽  
Hongtai Xie ◽  
Tangjie Mu ◽  
...  
Keyword(s):  
Laser Heating ◽  
Spin Exchange ◽  
Low Frequency ◽  
Basic Research ◽  
Electric Heating ◽  
Pump Light ◽  
Navigation Systems ◽  
All Optical ◽  
Heating Mode ◽  
First Time

Abstract Ultra-sensitive comagnetometers, which are designed to detect nuclear-and electron-spin-dependent interaction, have important applications ranging from basic research to inertial navigation systems (INSs). Unfortunately, electric heating, which is typically used in comagnetometers, introduces systematic errors because of the unavoidable generation of a modulated magnetic field. In this study, we investigate and introduce K-Rb-21Ne comagnetometer that uses laser heating for the first time, when operated in the spin-exchange relaxation free (SERF) regime. The performance of the comagnetometer, which is equipped with both laser heating and electric heating, is investigated, and the two heating modes are compared. The temperature characteristics of the comagnetometer are studied theoretically and experimentally. By optimizing the operating temperature and power density of the pump-light, an equivalent rotation sensitivity of 2.5×10^(-7) rad/s/√Hz@1Hz is achieved in laser heating mode. The improvement of laser-heating technology could prove essential to reduce electron relaxation and increase the low-frequency sensitivity of comagnetometers. Our results indicate that laser heating can make comagnetometers more suitable for applications in basic research (fifth force, dark matter, etc.), INSs, and other accurate measurements of electronic and nuclear precession.

scholarly journals On-site monitoring of atomic density number for an all-optical atomic magnetometer based on atomic spin exchange relaxation

2016 ◽  
Vol 24 (15) ◽  
pp. 17234 ◽  
Author(s):  
Hong Zhang ◽  
Sheng Zou ◽  
Xiyuan Chen ◽  
Ming Ding ◽  
Guangcun Shan ◽  
...  
Keyword(s):  
Spin Exchange ◽  
Atomic Density ◽  
Atomic Spin ◽  
Site Monitoring ◽  
All Optical

Correlation analysis of radiation damage

1978 ◽  
Vol 36 (1) ◽  
pp. 214-215
Author(s):  
R. Hegerl ◽  
A. Feltynowski ◽  
B. Grill
Keyword(s):  
Electron Microscopy ◽  
Independent Random Variables ◽  
Optical Parameters ◽  
Bright Field Image ◽  
Bright Field ◽  
Expectation Value ◽  
All Optical ◽  
Image Element ◽  
Stochastic Series ◽  
The Common

Till now correlation functions have been used in electron microscopy for two purposes: a) to find the common origin of two micrographs representing the same object, b) to check the optical parameters e. g. the focus. There is a third possibility of application, if all optical parameters are constant during a series of exposures. In this case all differences between the micrographs can only be caused by different noise distributions and by modifications of the object induced by radiation.Because of the electron noise, a discrete bright field image can be considered as a stochastic series Pm,where i denotes the number of the image and m (m = 1,.., M) the image element. Assuming a stable object, the expectation value of Pm would be Ηm for all images. The electron noise can be introduced by addition of stationary, mutual independent random variables nm with zero expectation and the variance. It is possible to treat the modifications of the object as a noise, too.

Spin exchange, past, present and future

1985 ◽  
Vol 10 (6) ◽  
pp. 645-657 ◽  
Author(s):  
W. Happer
Keyword(s):  
Spin Exchange
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