Locking distributed feedback laser diode frequency to gas absorption lines based on genetic programming

Quan, Wei; Li, Guanghui; Fang, Zishan; Zhai, Yueyang; Liu, Feng

doi:10.1117/1.oe.56.1.016106

Cited by 3 publications

(3 citation statements)

References 19 publications

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“…If the noises above are optimized by technology means, the sensitivity of the hybrid optical pumping SERF atomic magnetometer approaches to the ultimate sensitivity, which is also helpful to study the atomic spin gyroscope [48][49][50][51][52] .…”

Section: Sementioning

confidence: 99%

The polarization and the fundamental sensitivity of 39K (133Cs)-85Rb-4He hybrid optical pumping spin exchange relaxation free atomic magnetometers

Liu

Jing

Wang

et al. 2017

Sci Rep

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The hybrid optical pumping spin exchange relaxation free (SERF) atomic magnetometers can realize ultrahigh sensitivity measurement of magnetic field and inertia. We have studied the 85Rb polarization of two types of hybrid optical pumping SERF magnetometers based on 39K-85Rb-4He and 133Cs-85Rb-4He respectively. Then we found that 85Rb polarization varies with the number density of buffer gas 4He and quench gas N2, pumping rate of pump beam and cell temperature respectively, which will provide an experimental guide for the design of the magnetometer. We obtain a general formula on the fundamental sensitivity of the hybrid optical pumping SERF magnetometer due to shot-noise. The formula describes that the fundamental sensitivity of the magnetometer varies with the number density of buffer gas and quench gas, the pumping rate of pump beam, external magnetic field, cell effective radius, measurement volume, cell temperature and measurement time. We obtain a highest fundamental sensitivity of 1.5073 aT/Hz 1/2 (1 aT = 10−18 T) with 39K-85Rb-4He magnetometer between above two types of magnetometers when 85Rb polarization is 0.1116. We estimate the fundamental sensitivity limit of the hybrid optical pumping SERF magnetometer to be superior to 1.8359 × 10−2 aT/Hz 1/2, which is higher than the shot-noise-limited sensitivity of 1 aT/Hz 1/2 of K SERF atomic magnetometer.

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Section: Sementioning

confidence: 99%

The polarization and the fundamental sensitivity of 39K (133Cs)-85Rb-4He hybrid optical pumping spin exchange relaxation free atomic magnetometers

Liu

Jing

Wang

et al. 2017

Sci Rep

Self Cite

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“…Generally, the elements in the function set include basic algebraic operators, Boolean algebraic operators, and some other user defined operators. 22 The terminal set in GA contains input variables, numerical constants, logical constants, and so on. The tree-structured model is established by randomly selecting the elements from the function and terminal sets as the root node.…”

Section: Ga Theorymentioning

confidence: 99%

Genetic algorithm for accurate modeling of distributed Bragg reflector laser power and wavelength

et al. 2019

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We propose a modeling methodology tailored to predicting the wavelength and power output from a distributed Bragg reflector laser for use in quantum measurements. The relationship between power, wavelength, current, and temperature is acquired with a genetic algorithm (GA). The function set and termination set for GA are determined from the physical mechanisms of laser current, temperature, and output performance. To verify the validity of the method, measured data are divided into a training group and a test group. The test results show that our models can accurately predict the value of power and wavelength at the given current and temperature, with the RMSE of 13.4 μW and 6.0 × 10 −5 nm, respectively. This method can help enhance the output performance of a laser. © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…In [20], it was reported that GP could be applied in modeling and optimization of a random atomic spin gyroscope drift. In addition, in [21] the GP was utilized to lock the distributed feedback laser diode frequency to the gas absorption lines.…”

mentioning

confidence: 99%

A New Method for Reduction of Atomic Magnetometer Noise Based on Multigene Genetic Programming

2019

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An ultra-high precision magnetic field measurement is of great scientific and economic significance. An atomic magnetometer that operates in a spin-exchange relaxation-free (SERF) regime has superior sensitivity and, thus, is of great significance for the ultra-high precision magnetic field measurement. In order to reduce the noise of a SERF atomic magnetometer and further improve its sensitivity, a method for noise reduction based on the multigene genetic programming (MGGP) is presented. Different from the existing methods, in this method, the model of magnetometer noise is established based on the experimental data. Namely, the noise of the SERF atomic magnetometer is first modeled by the MGGP algorithm and then reduced by the obtained model. Besides, in this way, the sensitivity is improved. The experimental results indicate that our MGGP model can adequately reflect the characteristics of the SERF magnetometer noise. Moreover, after applying the proposed method, the sensitivity of the SERF magnetometer is improved about 13 times at 1 Hz, and there is also a significant sensitivity increase at the frequencies less than 10 Hz. Therefore, the proposed method can effectively reduce the noise and improve the sensitivity of the SERF magnetometer in the low-frequency band. INDEX TERMS Atomic magnetometer noise modeling, multigene genetic programming, sensitivity improvement, spin-exchange relaxation-free regime.

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Locking distributed feedback laser diode frequency to gas absorption lines based on genetic programming

Cited by 3 publications

References 19 publications

The polarization and the fundamental sensitivity of 39K (133Cs)-85Rb-4He hybrid optical pumping spin exchange relaxation free atomic magnetometers

The polarization and the fundamental sensitivity of 39K (133Cs)-85Rb-4He hybrid optical pumping spin exchange relaxation free atomic magnetometers

Genetic algorithm for accurate modeling of distributed Bragg reflector laser power and wavelength

A New Method for Reduction of Atomic Magnetometer Noise Based on Multigene Genetic Programming

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