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http://hdl.handle.net/2289/7717| Title: | A Real-Time Digital Receiver for Correlation Measurements in Atomic Systems |
| Authors: | Mugundhan, V Swar, Maheswar Bhar, Subhajit Chaudhuri, Saptarishi |
| Keywords: | Terms—Correlation digital signal processing field programmable gate arrays, laser applications magnetometers, spectroscopy. |
| Issue Date: | Feb-2021 |
| Publisher: | IEEE |
| Citation: | IEEE Transactions On Instrumentation And Measurement, 2021, Vol.70, Artical No. 2001508 |
| Abstract: | We present the development and characterization of a generic, reconfigurable, low-cost (<350$) software-defined digital receiver system (DRS) for temporal correlation measurements in atomic spin ensembles. We demonstrate the use of the DRS as a component of a high-resolution magnetometer. Digital receiver-based fast Fourier transform spectrometers (FFTSs) are generally superior in performance in terms of signal-tonoise ratio (SNR) compared with traditional swept-frequency spectrum analyzers (SFSAs). In applications where the signals being analyzed are a very narrow band in the frequency domain, recording them at high speeds over a reduced bandwidth provides flexibility to study them for longer periods.We have built the DRS on the STEMLab 125-14 FPGA platform, and it has two different modes of operation: FFT spectrometer and real-time raw voltage recording mode. We evaluate its performance by using it in atomic spin noise spectroscopy (SNS). We demonstrate that the SNR is improved by more than one order of magnitude with the FFTS compared with that of the commercial SFSA. We also highlight that with this DRS operating in the triggered data acquisition mode, one can achieve a spin noise (SN) signal with high SNR in a recording time window as low as 100 ms. We make use of this feature to perform time-resolved high-resolution magnetometry. While the receiver was initially developed for SNS experiments, it can be easily used for other atomic, molecular, and optical (AMO) physics experiments as well |
| Description: | Restricted Access |
| URI: | http://hdl.handle.net/2289/7717 |
| ISSN: | 0018-9456 1557-9662 (Online) |
| Alternative Location: | https://ieeexplore.ieee.org/document/9205918 |
| Copyright: | 2020 IEEE. |
| Appears in Collections: | Research Papers (A&A) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2021_IEEE Trans on Instru and Measurement_Vol.70_P2001508.pdf Restricted Access | Restricted Access. | 1.44 MB | Adobe PDF | View/Open Request a copy |
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