Related papers: Fast, powerful, low-noise optical pumping of an atomic vapor with semiconductor optical amplifiers

Fast, powerful, low-noise optical pumping of an atomic vapor with semiconductor optical amplifiers

URL: http://arxiv.org/abs/2604.26721v1
Date: Wed, 29 Apr 2026 14:23:10 GMT
Title: Fast, powerful, low-noise optical pumping of an atomic vapor with semiconductor optical amplifiers
Abstract summary: We study the noise properties of three strategies for generating pulsed optical pumping.<n>Using the higher power available from the SOA, we demonstrate an environment-limited sensitivity of $80textfT/sqrttextHz$ at $600textHz$ and 200fT$200textfT/sqrttextHz$ at $4textkHz$.
Score: 39.146761527401424
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We use a $^{87}\text{Rb}$ atomic vapor, suitable for an optically-pumped magnetometer (OPM) in Earth-field conditions, to study the noise properties of three strategies for generating pulsed optical pumping. We compare a frequency-modulated (FM) laser, amplitude modulation (AM) via an acousto-optic modulator (AOM), and amplitude modulation via a semiconductor optical amplifier (SOA). Pumping the ensemble to operate as a Bell-Bloom OPM, and with an equal degree of spin polarization, the three methods give nearly identical sensitivity, showing that the SOA, despite being an active device, can introduce negligible additional noise. Pumping the ensemble to operate as a free-induction-decay OPM, we observe longer unpumped coherence times with the SOA-AM method than with the FM method. Finally, using the higher power available from the SOA, we demonstrate an environment-limited sensitivity of $80\text{fT}/\sqrt{\text{Hz}}$ at $600\text{Hz}$ and 200fT$200\text{fT}/\sqrt{\text{Hz}}$ at $4\text{kHz}$, one to two orders of magnitude beyond what was achievable with the other pumping methods.

Related papers

Candidate overtone shear horizontal SAW resonators in thin-film lithium niobate for intermodal acousto-optic modulation [8.493621004625915]
The merits of thin-film surface acoustic wave (SAW) devices are pivotal to develop the high-performance intermodal acousto-optic modulators.<n>We have proposed shear-horizontal (SH) SAW resonators for anticipated intermodal acousto-optic modulation on the thin-film lithium niobate platform.
arXiv Detail & Related papers (2026-06-11T03:38:31Z)
Quantum squeezing in an all-resonant periodically poled lithium niobate microresonator [8.4001763612289]
Quadratic platforms provide stronger parametric interactions, lower pump power requirements, and greater spectral engineering flexibility.<n>We demonstrate strong, broadband squeezed-light generation on a thin-film lithium niobate (TFLN) photonic chip.<n>We demonstrate single-mode squeezing at degeneracy with a squeezed-light spectrum exceeding 10.3 THz.
arXiv Detail & Related papers (2026-02-26T07:10:57Z)
Quantum noise in a squeezed-light-enhanced multiparameter quantum sensor [41.94295877935867]
We study quantum enhancement of sensitivity using squeezed light in a quantum sensor.<n>The hOPM acquires both the dc field strength (scalar magnetometry) and resonantly detects one quadrature of the ac magnetic field at a chosen frequency.<n>We observe these interactions using squeezed light as a tool to control the distribution of quantum noise between $S$ and $S_3$ Stokes components.
arXiv Detail & Related papers (2025-06-09T20:00:51Z)
Integrated frequency-modulated optical parametric oscillator [45.82374977939355]
We introduce an integrated optical frequency comb generator that combines electro-optics and parametric amplification. The FM-OPO microcomb does not form pulses but maintains operational simplicity and highly efficient pump power utilization. The FM-OPO microcomb contributes a new approach to the field of microcombs and promises to herald an era of miniaturized precision measurement.
arXiv Detail & Related papers (2023-07-09T15:08:48Z)
Demonstration of a Quantum Noise Limited Traveling-Wave Parametric Amplifier [0.0]
Recent progress in quantum computing and the development of novel detector technologies for astrophysics is driving the need for high-gain, broadband, and quantum-limited amplifiers. We present a purely traveling-wave parametric amplifier (TWPA) using an inverted NbTiN microstrip and amorphous Silicon dielectric.
arXiv Detail & Related papers (2023-06-19T15:45:55Z)
Numerical analysis of a three-wave-mixing Josephson traveling-wave parametric amplifier with engineered dispersion loadings [62.997667081978825]
Recently proposed Josephson traveling-wave parametric amplifier has great potential in achieving a gain of 20 dB and a flat bandwidth of at least 4 GHz. We model the advanced JTWPA circuit with periodic modulation of the circuit parameters. engineered dispersion loadings allow achieving sufficiently wide $3$ dB-bandwidth from $3$ GHz to $9$ GHz combined with a reasonably small ripple.
arXiv Detail & Related papers (2022-09-22T14:46:04Z)
Three-wave mixing traveling-wave parametric amplifier with periodic variation of the circuit parameters [0.0]
We report the implementation of a near-quantum-limited, traveling-wave parametric amplifier that uses three-wave mixing (3WM) With a chain of 440 SNAILs, the amplifier provides up to 20 dB gain and a 3-dB bandwidth of 1 GHz.
arXiv Detail & Related papers (2022-09-15T18:12:30Z)
Topological Josephson parametric amplifier array: A proposal for directional, broadband, and low-noise amplification [39.58317527488534]
Low-noise microwave amplifiers are crucial for detecting weak signals in fields such as quantum technology and radio astronomy. We show that compact devices with few sites can achieve exceptional performance, with gains exceeding 20 dB over a bandwidth ranging from hundreds of MHz to GHz. The device also operates near the quantum noise limit and provides topological protection against up to 15% fabrication disorder.
arXiv Detail & Related papers (2022-07-27T18:07:20Z)
Quantum-limited millimeter wave to optical transduction [50.663540427505616]
Long distance transmission of quantum information is a central ingredient of distributed quantum information processors. Current approaches to transduction employ solid state links between electrical and optical domains. We demonstrate quantum-limited transduction of millimeter-wave (mmwave) photons into optical photons using cold $85$Rb atoms as the transducer.
arXiv Detail & Related papers (2022-07-20T18:04:26Z)
Continuous-Wave Frequency Upconversion with a Molecular Optomechanical Nanocavity [46.43254474406406]
We use molecular cavity optomechanics to demonstrate upconversion of sub-microwatt continuous-wave signals at $sim$32THz into the visible domain at ambient conditions. The device consists in a plasmonic nanocavity hosting a small number of molecules. The incoming field resonantly drives a collective molecular vibration, which imprints an optomechanical modulation on a visible pump laser.
arXiv Detail & Related papers (2021-07-07T06:23:14Z)
Dynamical low-noise microwave source for cold-atom experiments [37.69303106863453]
We present a low-phase-noise microwave source with two independently controllable output paths. The presented microwave source combines two commercially available frequency synthesizers. We demonstrate a low integrated phase noise of $480,mu$rad in the range of $10,$Hz to $100,$kHz.
arXiv Detail & Related papers (2020-03-24T17:27:21Z)

This list is automatically generated from the titles and abstracts of the papers in this site.