A tunable Doppler-free dichroic lock for laser frequency stabilization

Singh, Vivek; Tiwari, V. B.; Mishra, S. R.; Rawat, H. S.

doi:10.1007/s00340-016-6497-6

Cited by 10 publications

(3 citation statements)

References 33 publications

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“…We found that low-temperature resistivity of alloys, for both the samples annealed at 1373 K and post-annealed at 1473 K, follow T 3/2 temperature dependence (shown in Figure 3a,b) for T < 25 K. This indicates that the system has a low-temperature glassy or disordered magnetic phase and annealing at higher temperature does not considerably affect the low-temperature magnetic phase. This is consistent with similar findings in other FSMA alloys like Mn 2 Ni 1.6 Sn 0.4 , [38] NiMnAl, [39,40] and is a new finding in Co-Ni-Al system. As temperature increases, the electron-phonon scattering induced resistivity ρ ph becomes the dominant contribution.…”

Section: Resultssupporting

confidence: 93%

Effect of Annealing on the Structural and Magnetic Properties of CoNiAl FSMA

Hossain

Ghosh

Kanth³

et al. 2019

Crystal Research and Technology

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A ferromagnetic shape memory alloy is a very interesting system that has various structural transformation, microstructural phases and magnetic properties, and interplays among them. The system studied here is Co39Ni34Al27 that comprises a mixture of β (body‐centered cubic) and γ (face‐centered cubic) structural phases. Here the β phase is responsible for the FSMA behavior and the γ phase improves the mechanical properties necessary for practical applications. Herein, it is showed through resistivity and magnetization measurements that post‐annealing to a higher temperature significantly alters the ratio of β and γ phases in the system, resulting in increasing the austenite to martensite transition temperature and significantly modifying the magnetic properties. Additionally, it is also shown that the low‐temperature magnetic phase of this FSMA system is a disordered magnetic system.

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Section: Resultssupporting

confidence: 93%

Effect of Annealing on the Structural and Magnetic Properties of CoNiAl FSMA

Hossain

Ghosh

Kanth³

et al. 2019

Crystal Research and Technology

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“…6. We have used a We have used the tunable Doppler-free dichroic lock (TDFDL) technique developed in our lab to tune and stabilize frequency of the cooling laser [14]. The quadrupole magnetic field was generated by flowing a 40 A current in U-wire and by applying ∼ 8.0 G bias magnetic field in negative y-direction.…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

On loading of a magneto-optical trap on an atom-chip with U-wire quadrupole field

Singh

Tiwari

Singh

et al. 2018

Journal of Modern Optics

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The role of U-wire generated quadrupole like magnetic field configuration on loading of cold 87 Rb atoms in a magneto-optical trap (MOT) on atom-chip has been investigated. It is shown by simulations that the quadrupole field profile and the center of the quadrupole field vary depending upon the U-wire current and bias field values. The result of simulations show that the resemblance of generated field configuration to the ideal quadrupole field critically depends on the values of current in U-wire and bias magnetic field. The observed number of trapped atoms in the MOT and its position has also been found to depend on the quadrupole field configuration. The number of trapped atoms in the MOT reaches maximum when the field configuration approaches close to an ideal quadrupole field. This study will help in optimising the number in the MOT before transfer of these cold atoms in the atom-chip wire trap. arXiv:1801.09461v2 [physics.atom-ph]

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“…According to the difference of the intensity of the two circularly polarized lights, the direction of laser oscillation frequency and the deviation from the cen-ter frequency can be determined. So that a control signal can be formed to adjust the resonator and stabilize it at the center frequency of the spectral line [24][25][26] .…”

Section: Dichroic Atomic Vapor Laser Lock (Davll)mentioning

confidence: 99%

The developing condition analysis of semiconductor laser frequency stabilization technology

Yao

Zou

et al. 2018

J. Semicond.

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The frequency stability of free-running semiconductor lasers is influenced by several factors, such as driving current and external operating environment. The frequency stabilization of laser has become an international research hotspot in recent years. This paper reviews active frequency stabilization technologies of laser diodes and elaborates their principles. Based on differences of frequency discrimination curves, these active frequency stabilization technologies are classified into three major types, which are harmonic frequency stabilization, Pound-Drever-Hall (PDH) technology and curve subtraction frequency stabilization. Further, merits and demerits of each technology are compared from aspects of frequency stability and structure complexity. Finally, prospects of frequency stabilization technologies of semiconductor lasers are discussed in detail. Combining several of these methods are future trends, especially the combination of frequency stabilization of F–P cavity. And PID electronic control for optimizing the servo system is generally added in the methods mentioned above.

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A tunable Doppler-free dichroic lock for laser frequency stabilization

Cited by 10 publications

References 33 publications

Effect of Annealing on the Structural and Magnetic Properties of CoNiAl FSMA

Effect of Annealing on the Structural and Magnetic Properties of CoNiAl FSMA

On loading of a magneto-optical trap on an atom-chip with U-wire quadrupole field

The developing condition analysis of semiconductor laser frequency stabilization technology

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