Field-programmable gate array based arbitrary signal generator and oscilloscope for use in slow light and storage of light experiments

Nikolić, Stanko N.; Batić, Viktor; Panić, B.; Jelenković, Branislav

doi:10.1063/1.4811147

Cited by 4 publications

(3 citation statements)

References 28 publications

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“…Solid lines are to guide the eye. adjustable amplitudes and durations, were generated by fieldprogrammable gate array based signal generator and oscilloscope, as described in [48].…”

Section: Description Of the Experimentsmentioning

confidence: 99%

Transient development of Zeeman electromagnetically induced transparency during propagation of Raman–Ramsey pulses through Rb buffer gas cell

Nikolić

Radonjić²,

Lučić³

et al. 2015

J. Phys. B: At. Mol. Opt. Phys.

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We investigate, experimentally and theoretically, time development of Zeeman electromagnetically induced transparency (EIT) during propagation of two time separated polarization laser pulses, preparatory and probe, through Rb vapour. The pulses were produced by modifying laser intensity and degree of elliptical polarization. The frequency of the single laser beam is locked to the hyperfine = → = F F 2 1 g e transition of the D 1 line in 87 Rb. Transients in the intensity of σ − component of the transmitted light are measured or calculated at different values of the external magnetic field, during both preparatory and probe pulse. Zeeman EIT resonances at particular time instants of the pulse propagation are reconstructed by appropriate sampling of the transients. We observe how laser intensity, Ramsey sequence and the Rb cell temperature affect the time dependence of EIT line shapes, amplitudes and linewidths. We show that at early times of the probe pulse propagation, several Ramsey fringes are present in EIT resonances, while at later moments a single narrow peak prevails. Time development of EIT amplitudes are determined by the transmitted intensity of the σ − component during the pulse propagation.

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“…Solid lines are to guide the eye. adjustable amplitudes and durations, were generated by fieldprogrammable gate array based signal generator and oscilloscope, as described in [48].…”

Section: Description Of the Experimentsmentioning

confidence: 99%

Transient development of Zeeman electromagnetically induced transparency during propagation of Raman–Ramsey pulses through Rb buffer gas cell

Nikolić

Radonjić²,

Lučić³

et al. 2015

J. Phys. B: At. Mol. Opt. Phys.

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“…Nowadays, FPGA based devices are popular as their customization enable the experiment to reach beyond the level of standard analog devices, where high bandwidth is not a requisite. FPGA implementation of photon counting [3], real time data acquisition [4], arbitrary waveform generation [5], high quality filter [6] and so on are thus widely used. In particular, concerning the lock-in amplifier and Proportional-Integral-Derivative (PID) controller, which are focus of this article, Morris et al first conceptualized the digital phase sensitive detection [7,8].…”

Section: Introductionmentioning

confidence: 99%

An FPGA based all-in-one function generator, lock-in amplifier and auto-relockable PID system

et al. 2019

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We report an all-in-one waveform generator, lock-in amplifier and Proportional-Integral-Differential (PID) controller, embedded in a single Field Programmable Gate Array (FPGA). The PID controller is advanced with a novel automatic relocking mechanism, which is capable of self-finding and relocking at the desired setpoint upon unlocking of the PID due to disturbances. The instrument is designed in such a way that these devices can either be used individually or simultaneously. Digital implementation via software processing of the associated modules is used and the firmware is embedded in an FPGA IC, which makes it compact and reconfigurable. The instrument consists of a hardware for establishing external linkage and a Python based computer-controlled interface to control it from a remote PC as well as for acquiring and plotting relevant data. A steep roll-off of the filters (6 dB/octave to 24 dB/octave), low noise density (30 nV/√Hz @ 100 kHz) in the lock-in amplifier and a PID bandwidth of 100 kHz makes it useful for wide range of applications. Versatility of the instrument is demonstrated in three different experiments, (i) Auger electron spectroscopy, (ii) low coherence optical tomography and (iii) laser frequency stabilization followed by self identification of the setpoint upon unlocking and automatic relocking to that.

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“…Several FPGA-based devices have been developed in the field of atomic and molecular physics [13][14][15][16][17][18] , including various laser locking systems [15][16][17][18] . The first demonstration of a FPGA-based laser lock realized a side of fringe lock to a cavity 15 .…”

Section: Introductionmentioning

confidence: 99%

A simple laser locking system based on a field-programmable gate array

Jørgensen

Birkmose

Trelborg

et al. 2016

Review of Scientific Instruments

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Frequency stabilization of laser light is crucial in both scientific and industrial applications. Technological developments now allow analog laser stabilization systems to be replaced with digital electronics such as field-programmable gate arrays, which have recently been utilized to develop such locking systems. We have developed a frequency stabilization system based on a field-programmable gate array, with emphasis on hardware simplicity, which offers a user-friendly alternative to commercial and previous home-built solutions. Frequency modulation, lock-in detection and a proportional-integral-derivative controller are programmed on the field-programmable gate array and only minimal additional components are required to frequency stabilize a laser. The locking system is administered from a host-computer which provides comprehensive, long-distance control through a versatile interface. Various measurements were performed to characterize the system. The linewidth of the locked laser was measured to be 0.7 ± 0.1 MHz with a settling time of 10 ms. The system can thus fully match laser systems currently in use for atom trapping and cooling applications.

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Field-programmable gate array based arbitrary signal generator and oscilloscope for use in slow light and storage of light experiments

Cited by 4 publications

References 28 publications

Transient development of Zeeman electromagnetically induced transparency during propagation of Raman–Ramsey pulses through Rb buffer gas cell

Transient development of Zeeman electromagnetically induced transparency during propagation of Raman–Ramsey pulses through Rb buffer gas cell

An FPGA based all-in-one function generator, lock-in amplifier and auto-relockable PID system

A simple laser locking system based on a field-programmable gate array

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