A robust phase-locked diode laser system for EIT experiments in cesium

Höckel, David; Scholz, Matthias; Benson, Oliver

doi:10.1007/s00340-008-3313-y

Cited by 32 publications

(15 citation statements)

References 30 publications

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“…One is an external-cavity diode laser (ECDL) and the other is a frequency-doubled telecom laser which has a 20 kHz linewidth and output power up to 1 W. The ECDL, which is locked to a 87 Rb saturated absorption line via modulation transfer spectroscopy [50], provides the MOT cooling light. The telecom laser, locked to the ECDL via a heterodyne optical phase lock loop (OPLL) [51], provides the laser frequency components for all other frequencies in the experiment, including the repumper, state preparation lasers, Raman lasers, and the probe laser. The OPLL allows us to switch the telecom laser frequency over a range of several hundreds of MHz in a few hundreds of µs.…”

Section: Discussionmentioning

confidence: 99%

Single-Source Multiaxis Cold-Atom Interferometer in a Centimeter-Scale Cell

et al. 2019

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Using the technique of point source atom interferometry (PSI), we characterize the sensitivity of a multi-axis gyroscope based on free-space Raman interrogation of a single source of cold atoms in a glass vacuum cell. The instrument simultaneously measures the acceleration in the direction of the Raman laser beams and the projection of the rotation vector onto the plane perpendicular to that direction. The sensitivities for the magnitude and direction of the rotation vector measurement are 0.033 • /s and 0.27 • with one second averaging time, respectively. The fractional acceleration sensitivity δg/g is 1.6 × 10 −5 / √ Hz. The sensitivity could be improved by increasing the Raman interrogation time, allowing the cold-atom cloud to expand further, correcting the fluctuations in the initial cloud shape, and reducing sources of technical noise. The PSI technique resolves a rotation vector in a plane by measuring a phase gradient. This two-dimensional rotation sensitivity may be specifically important for applications such as tracking the precession of a rotation vector and gyrocompassing.

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Section: Discussionmentioning

confidence: 99%

Single-Source Multiaxis Cold-Atom Interferometer in a Centimeter-Scale Cell

et al. 2019

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“…MW electric field is characterized by it’s strength/amplitude, frequency, polarization and the phase. The previously studied atomic based MW electrometry is not phase sensitive as EIT in a simple multilevel system, happens to be insensitive to the absolute phase of probe and the control fields but only it’s robustness depends upon the phase stability 18 .…”

Section: Introductionmentioning

confidence: 98%

Highly sensitive atomic based MW interferometry

Shylla

Nyakang’o

Pandey

2018

Sci Rep

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We theoretically study a scheme to develop an atomic based micro-wave (MW) interferometry using the Rydberg states in Rb. Unlike the traditional MW interferometry, this scheme is not based upon the electrical circuits, hence the sensitivity of the phase and the amplitude/strength of the MW field is not limited by the Nyquist thermal noise. Further, this system has great advantage due to its much higher frequency range in comparision to the electrical circuit, ranging from radio frequency (RF), MW to terahertz regime. In addition, this is two orders of magnitude more sensitive to field strength as compared to the prior demonstrations on the MW electrometry using the Rydberg atomic states. Further, previously studied atomic systems are only sensitive to the field strength but not to the phase and hence this scheme provides a great opportunity to characterize the MW completely including the propagation direction and the wavefront. The atomic based MW interferometry is based upon a six-level loopy ladder system involving the Rydberg states in which two sub-systems interfere constructively or destructively depending upon the phase between the MW electric fields closing the loop. This work opens up a new field i.e. atomic based MW interferometry replacing the conventional electrical circuit in much superior fashion.

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“…However, when the required frequency difference increases past the gigahertz level, it is often preferable to use two separate sources. In this case, an optical phase-lock loop (OPLL) is introduced to synchronize the phase between two individual lasers [6,7] . Based on this method, the frequency difference of the two lasers is tunable up to several gigahertz [8,9] .…”

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confidence: 99%

Compact phase-lock loop for external cavity diode lasers

et al. 2016

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We present a compact, low-noise, and inexpensive optical phase-lock loop (OPLL) system to synchronize the frequency and the phase between two external cavity diode lasers. Based on a direct digital synthesizer technique, a programmable radio-frequency generator is implemented as the reference signal source. The OPLL has a narrow beat note linewidth below 1 Hz and a residual mean-square phase error of 0.06 rad 2 in a 10 MHz integration bandwidth. The experimental test results prove the competent performance of the system, which is promising as a low-budget choice in atomic physics applications.

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A robust phase-locked diode laser system for EIT experiments in cesium

Cited by 32 publications

References 30 publications

Single-Source Multiaxis Cold-Atom Interferometer in a Centimeter-Scale Cell

Single-Source Multiaxis Cold-Atom Interferometer in a Centimeter-Scale Cell

Highly sensitive atomic based MW interferometry

Compact phase-lock loop for external cavity diode lasers

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