Optical Free Induction Decay

Brewer, Richard G.; Shoemaker, R. L.

doi:10.1103/physreva.6.2001

Cited by 305 publications

(103 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…2b or 8c). The mathematical description follows earlier work on two-level systems by Brewer and coworkers [55,56], or the work on commensurate echoes in THz time-domain spectroscopy [11] or rotational recurrences in pump probe spectroscopy [57,58]. Of course, there is no particular reason to view the signature in the purely time or frequency domains, and in Fig.…”

Section: Nsec 46 Nsecmentioning

confidence: 99%

Coherent dual-comb spectroscopy at high signal-to-noise ratio

2010

View full text Add to dashboard Cite

Two coherent frequency combs are used to measure the full complex response of a sample in a configuration analogous to a dispersive Fourier transform spectrometer, infrared time domain spectrometer, or a multiheterodyne laser spectrometer. This dual comb spectrometer retains the frequency accuracy and resolution of the reference underlying the stabilized combs. We discuss the specific design of our coherent dual-comb spectrometer and demonstrate the potential of this technique by measuring the overtone vibration of hydrogen cyanide, centered at 194 THz (1545 nm). We measure the fully normalized, complex response of the gas over a 9 THz bandwidth at 220 MHz frequency resolution yielding 41,000 resolution elements. The average spectral signal-to-noise ratio (SNR) over the 9 THz bandwidth is 2,500 for both the magnitude and phase of the measured spectral response and the peak SNR is 4,000. This peak SNR corresponds to a fractional absorption sensitivity of 0.05% and a phase sensitivity of 250 microradians. As the spectral coverage of combs expands, coherent dual-comb spectroscopy could provide high frequency accuracy and resolution measurements of a complex sample response across a range of spectral regions.Work of U.S. government, not subject to copyright.

show abstract

Section: Nsec 46 Nsecmentioning

confidence: 99%

Coherent dual-comb spectroscopy at high signal-to-noise ratio

2010

View full text Add to dashboard Cite

show abstract

“…On the other hand, the phenomena of optical nutation and free-induction decay (FID) were studied extensively in the early days after the invention of the laser [25][26][27][28][29][30], probably because of the realization that the equations governing such a system are formally equivalent to the well-studied spinresonance Bloch equation [31,32]. Recently, optical FID with long coherence time generated using cold atoms has been reported [33,34].…”

Section: Introductionmentioning

confidence: 99%

Optical coherent transients in cold atoms: From free-induction decay to optical precursors

et al. 2010

View full text Add to dashboard Cite

We report theoretical and experimental studies of the propagation of a square-modulated laser pulse through a laser-cooled atomic ensemble of two-level absorbers, as well as through a three-level system with electromagnetically induced transparency. We find that the transmission characteristics over a wide range of optical depth can be fully accounted for as optical coherent transients excited by the wide spectral content of the square-modulated optical pulse. We show that both time-domain atom-field coupled equations and frequency-domain linear dispersion theory give precisely the same description of the optical transients at a weak power limit. At low optical depth with moderate absorption, resonant excitation dominates and free-induction decay (FID) contributes mostly to the transient field. At high optical depth when absorption and propagation effects become significant, lossless optical precursors start to dominate the transient response. By varying the optical depth from 0 to 45, we observe that optical transients evolve gradually from FID to optical precursors. We thus show that FID and optical precursors, which have been considered as two different optical transients for many decades, can be unified within a single theoretical frame and they are the manifestations of the same physical process in two different regimes.

show abstract

“…It is not necessary to know the form of the local field correction as Á eff can be determined directly from the Stark shift. A Stark shift of 1:57 AE 0:02 kHz=V Á cm À1 was measured along the C 2 axis using a Stark-switched optical free induction decay method [36]. This gives an effective dipole moment of 1:04 Â 10 À32 C Á m, resulting in frequency shifts predicted by Eq.…”

mentioning

confidence: 99%

Precision Measurement of Electronic Ion-Ion Interactions between NeighboringEu3+Optical Centers

et al. 2013

View full text Add to dashboard Cite

We report measurements of discrete excitation-induced frequency shifts on the 7 F 0 ! 5 D 0 transition of the Eu 3þ center in La:Lu:EuCl 3 Á 6D 2 O resulting from the optical excitation of neighboring Eu 3þ ions. Shifts of up to 46:081 AE 0:005 MHz were observed. The magnitude of the interaction between neighboring ions was found to be significantly larger than expected from the electric dipole-dipole mechanism often observed in rare earth systems. We show that a large network of interacting and individually addressable centers can be created by lightly doping crystals otherwise stoichiometric in the optically active rare earth ion, and that this network could be used to implement a quantum processor with more than ten qubits. DOI: 10.1103/PhysRevLett.111.240501 PACS numbers: 03.67.Lx, 42.50.Md, 78.47.nd Rare earth ions in solids are increasingly being utilized in demonstrations of quantum information devices. In particular, a broad range of protocols for realizing memories in these materials have been developed, using controlled reversible inhomogeneous broadening [1,2], atomic frequency combs [3,4], rephased amplified spontaneous emission [5] or silencing of a photon echo ([6,7]). The first demonstration of a quantum memory operating above the no cloning limit [8], and the first demonstration of storage for over a second [9], were performed in a rare earth doped material. Very large bandwidths [10] and multi-mode capacity [11] have been achieved and the ability to store polarization qubits demonstrated [12][13][14]. Rare earth solids are successful as quantum memories because they combine high spectral and spatial densities with long optical and hyperfine coherence times, properties that are almost unique to rare earth ions amongst all optical centers in solids.All of the above devices operate on the assumption that the rare earth ions are isolated from one another, interacting only through the optical field. This is a reasonable approximation for the low concentration crystals used for the quantum memory demonstrations to date, but as the rare earth ion concentration is increased to increase memory bandwidths and efficiencies, ion-ion interactions will increasingly become important.Although the interaction between ions is likely to degrade the performance of quantum devices requiring ensembles of isolated optical centers, there has been interest in utilizing electronic ion-ion interactions to perform quantum logic operations [15,16]. The experimental investigations to date have been carried out using an ensemble approach (e.g., Refs. [17][18][19][20]), but recent demonstrations of the detection of single rare earth ion dopants [21,22] has raised the prospect of developing single instance quantum processors based on rare earth ions. Electronic interactions between rare earth ions in crystals are not well characterized. They are studied through two main effects: energy transfer between ions and optical frequency shifts caused by the excitation of nearby ions. Most studies of both these effects have been mad...

show abstract

Optical Free Induction Decay

Cited by 305 publications

References 15 publications

Coherent dual-comb spectroscopy at high signal-to-noise ratio

Coherent dual-comb spectroscopy at high signal-to-noise ratio

Optical coherent transients in cold atoms: From free-induction decay to optical precursors

Precision Measurement of Electronic Ion-Ion Interactions between NeighboringEu3+Optical Centers

Contact Info

Product

Resources

About