Nonlinear Laser Spectroscopy

Letokhov, V. S.; Chebotayev, V. P.

doi:10.1007/978-3-540-37541-8

Cited by 371 publications

(159 citation statements)

References 0 publications

Supporting

Mentioning

156

Contrasting

Unclassified

Order By: Relevance

“…Lamb-dip spectroscopy suffers from an apparent drawback, the occurrence of crossover resonances (Winton 1972;Letokhov & Chebotayev 1977). These are dips due to the saturation of overlapping Gaussian profiles of two transitions with a common energy level and which occur midway between the two transition frequencies; there is a sample of velocity-selected molecules with equal but opposite Doppler shifts from each of the central frequencies, if the radiation travels forward or backward.…”

Section: Experimental Details and Spectra Analysismentioning

confidence: 99%

The hyperfine structure of the inversion-rotation transitionJ_K= ${1}_{0}$ $\leftarrow$ ${0}_{0}$ of NH₃investigated by Lamb-dip spectroscopy

Cazzoli

Dore

Puzzarini

2009

A&A

View full text Add to dashboard Cite

The ground-state inversion-rotation transition of ammonia at 572.498 GHz has been investigated in the laboratory using a sourcemodulation microwave spectrometer equipped with a double-pass cell. The experiment has been carried out at a pressure lower than 0.5 mTorr, thus enabling to record a Lamb-dip spectrum showing a partial resolution of the magnetic hyperfine structure due to the three proton spins. The achieved high resolution proved to be comparable to that of molecular beam experiments. This measurement provides very precise rest frequencies of the J K = 1 0 ← 0 0 transition and of its hyperfine components, which fall in a spectral region covered by the HIFI instrument on board the Herschel satellite.

show abstract

Section: Experimental Details and Spectra Analysismentioning

confidence: 99%

The hyperfine structure of the inversion-rotation transitionJ_K= ${1}_{0}$ $\leftarrow$ ${0}_{0}$ of NH₃investigated by Lamb-dip spectroscopy

Cazzoli

Dore

Puzzarini

2009

A&A

View full text Add to dashboard Cite

show abstract

“…Sub-Doppler nonlinear optical resonance as appearance of quantum coherence and interference in the context of frequency-correlation properties of the coherent components have been proposed in [3]. A widely used method is Doppler-free two-or multi-photon absorption where the velocity dependent detuning could be removed in the case that the wave vectors of the interacting beams sum down to zero (for a review, see [4]). This type of sub-Doppler spectrum is characterized by a large detuning from the intermediate resonance, measuring the fluorescence from the upper level as well as by small cross sections for these multi-photon processes.…”

mentioning

confidence: 99%

Sub-Doppler resolution controlled by two coherent driving fields

Dong

Popov

Tang

et al. 2001

Optics Communications

View full text Add to dashboard Cite

We propose a four-level model where sub-Doppler resolution as well as enhanced absorption of a weak probe field are realized by using two coherently driving fields. We show that spectral resolution can be improved by modifying the coherent fields intensity and frequencies. PACS number(s): 42.50. Hz, 42.50.Ct, 42.50.Gy I IntroductionMulti-photon transitions are embedded in a variety of optical effects based on correlated absorption and emission of two or more photons.Step-wise and multi-photon processes can be distinguished by their frequencycorrelation properties [1,2]. Sub-Doppler resolution for an inhomogeneously broadened medium based on multi-photon processes has attracted much attention in recent decades. The physical essence for this method lies in the fact that a detuning for multi-photon transition stipulated by Doppler frequency shift can be reduced or eliminated by adopting appropriate light propagation direction, since the detuning is the sum or difference of multiple single-photon transition detunings. Sub-Doppler nonlinear optical resonance as appearance of quantum coherence and interference in the context of frequency-correlation properties of the coherent components have been proposed in [3]. A widely used method is Doppler-free two-or multi-photon absorption where the velocity dependent detuning could be removed in the case that the wave vectors of the interacting beams sum down to zero (for a review, see [4]). This type of sub-Doppler spectrum is characterized by a large detuning from the intermediate resonance, measuring the fluorescence from the upper level as well as by small cross sections for these multi-photon processes. Enhanced by intermediate resonance sub-Doppler processes based on the use of strong driving fields and on a change of frequency-correlation properties of resonant multi-photon process in strong resonant fields, have been proposed in [3] and further developed in [5,6] (also in [2]). Substantial enhancement in absorption, gain and fluorescence controlled with the auxiliary appropriately propagating electro-magnetic wave has been predicted. An interference nature of the spectrum modification has been stressed, which implies that along the growth of the absorption (gain) in certain spectral intervals, integral over the frequency may even decrease. A role of increase of intensity of a probe field as well as features of Doppler-free lasers were explored too.Control of atomic response with intense coupling lasers has been a subject of many intensive studies in the context of electromagnetically induced transparency (EIT) [7], amplification without inversion (AWI) [8,9,10,11], enhancement of the refractive index without absorption [12] and so on (for review see [8,11,13]). SubDoppler resolution by using intense coherently driving field(s) at other transition(s) has been recently further explored in [14,15]. In Ref. [14] probe weak field absorption spectrum in three-level schemes was considered. It was pointed out that the linewidth of one of the two Autler-Townes absorptio...

show abstract

“…We note that, in addition to the hyperfine (hf) components, crossing resonances, the so-called ghost transitions (also known as crossover resonances or simply crossovers), are present. This effect is due to the saturation of overlapping Gaussian profiles of two or more transitions with a common rotational energy level [22,23]. As already noted in previous investigations (see, for example, Refs.…”

Section: Analysis Of the Spectramentioning

confidence: 74%

The hyperfine structure in the rotational spectra of D2O: Lamb-dip measurements and quantum-chemical calculations

et al. 2010

View full text Add to dashboard Cite

Nonlinear Laser Spectroscopy

Cited by 371 publications

References 0 publications

The hyperfine structure of the inversion-rotation transitionJ_K= ${1}_{0}$ $\leftarrow$ ${0}_{0}$ of NH₃investigated by Lamb-dip spectroscopy

The hyperfine structure of the inversion-rotation transitionJ_K= ${1}_{0}$ $\leftarrow$ ${0}_{0}$ of NH₃investigated by Lamb-dip spectroscopy

Sub-Doppler resolution controlled by two coherent driving fields

The hyperfine structure in the rotational spectra of D2O: Lamb-dip measurements and quantum-chemical calculations

Contact Info

Product

Resources

About

Nonlinear Laser Spectroscopy

Cited by 371 publications

References 0 publications

The hyperfine structure of the inversion-rotation transitionJK= ${1}_{0}$ $\leftarrow$ ${0}_{0}$ of NH3investigated by Lamb-dip spectroscopy

The hyperfine structure of the inversion-rotation transitionJK= ${1}_{0}$ $\leftarrow$ ${0}_{0}$ of NH3investigated by Lamb-dip spectroscopy

Sub-Doppler resolution controlled by two coherent driving fields

The hyperfine structure in the rotational spectra of D2O: Lamb-dip measurements and quantum-chemical calculations

Contact Info

Product

Resources

About

The hyperfine structure of the inversion-rotation transitionJ_K= ${1}_{0}$ $\leftarrow$ ${0}_{0}$ of NH₃investigated by Lamb-dip spectroscopy

The hyperfine structure of the inversion-rotation transitionJ_K= ${1}_{0}$ $\leftarrow$ ${0}_{0}$ of NH₃investigated by Lamb-dip spectroscopy