Phase control of gain and dispersion in an open V-type system

Xie, Fan; Li, J. J.; Tian, Shufen; Ni, Chen; Li, H.; Li, A. Y.; Xu, Zhizhan

doi:10.1080/09500340500072927

Cited by 11 publications

(2 citation statements)

References 29 publications

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“…However, in these studies, closed atomic systems were always used. Recently, we [49,50] have studied the effects of SGC and the relative phase between the probe and driving fields in an open V-type system, respectively. In this paper, we shall explore the effect of the relative phase between the probe and driving fields on the gain and dispersion in an open Ã-type LWI system with SGC.…”

Section: Introductionmentioning

confidence: 99%

Phase control of gain and dispersion in an open lambda-type inversionless lasing system

Xie

Tian

et al. 2005

Journal of Modern Optics

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The control role of the relative phase between the probe and driving fields on the gain and dispersion in an open Ã-type inversionless lasing system with spontaneously generated coherence (SGC) is investigated. It is shown that the inversionless gain and dispersion are quite sensitive to variation in the relative phase; by adjusting the value of the relative phase, electromagnetically induced transparency (EIT), a high refractive index with zero absorption and a larger inversionless gain can be realized. It is also shown that, in the contributions to the inversionless gain (absorption) and dispersion, the contribution from SGC is always much larger than that from the dynamically induced coherence for any value of the relative phase. Our analysis shows that variation in the SGC effect will cause the spectrum regions and values of the inversionless gain and dispersion to vary evidently. We also found that, under the same conditions, the values of the inversionless gain and dispersion in the open system are evidently larger than those in the corresponding closed system; EIT occurs in the open system but cannot occur in the closed system.

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Section: Introductionmentioning

confidence: 99%

Phase control of gain and dispersion in an open lambda-type inversionless lasing system

Xie

Tian

et al. 2005

Journal of Modern Optics

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“…have widely been studied. In addition, the investigations have shown that the properties of the system with SGC relate closely to the relative phase between the applied fields [2][3][4][5][6][7][8][9][10] . However, these studies are usually made for the closed atomic systems.…”

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confidence: 99%

Effect of exit and injection rates on phase-dependent transient evolution of gain without inversion

Qiao

Tan

et al. 2007

Optoelectron. Lett.

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It is shown that in an open -type system with spontaneously generated coherence, the transient evolution rule of the gain of lasing without inversion (LWI ) is very sensitive to variation of the relative phase between the probe and driving fields; the variety of the atomic exit rate 0 and the ratio C of the atomic injection rates also have a considerable effect on the phase-dependent transient evolution rule of LWI gain. We find that when =0, the transient and stationary LWI gain increases with C increasing but decreases with 0 increasing; when 0 , the effect of C and 0 on LWI gain is just opposite to that when =0 ; in order to get the largest transient and stationary LWI gain, we need selecting suitable values of , 0 and C. CLC numbers: TN241 Document code: A Article ID:Quantum coherence and interference in atomic systems can lead to many interesting phenomena such as lasing without inversion (LWI), electromagnetically induced transparency (EIT), coherent population trapping (CPT) and so on, in which LWI gets special attention due to its important application value [1] . There are many methods to produce conherence. A kind of coherence can be created by interference of spontaneous emission between different channels, which is usually called as spontaneously generated coherence (SGC), and it depends on the nonorthogonality of dipole moments. Recently, the effects of SGC on gain (absorption), dispersion, population and spontaneous emission spectrum etc. have widely been studied. In addition, the investigations have shown that the properties of the system with SGC relate closely to the relative phase between the applied fields [2][3][4][5][6][7][8][9][10] . However, these studies are usually made for the closed atomic systems. We have studied the effects of the relative phase on LWI gain (absorption) and dispersion of the steady state [11] , propagation of a light pulse [12,13] in an open -type threelevel atomic system with SGC. In this paper, we will investigate the effect of the relative phase on the transient evolution rule of the LWI gain in the open system, and analyze the manipulation role of the atomic exit rate and ratio of the atomic injection rates on the phase-dependent transient evolution of LWI gain. In our best knowledge this is also the first time to study the phase-dependent transient evolution of atomic response in an open atomic system.An open -type three-level atomic system is considered with an upper state |1> and two lower close-lying states |2> and |3>, as illustrated in Fig.1.Transition between |1> and |2> is driven by a strong coherent driving field with the amplitude E c , frequency c and Rabi frequency c = d 12 /2 . A weak coherent probe field with the amplitude E p , frequency p and Rabi frequency p = p d 13 /2 is applied between levels |1> and |3>. 2 1 and 2 2 denote the spontaneous decay rates from level |1> to levels |3> and |2>, respectively. J 2 and J 3 are the atomic injection rates for level |2> and |3> respectively; 0 is the atomic exit rate from the cavity. We also assume that th...

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Group velocity of the light pulse in an open V-type system

Xie

Tian

et al. 2007

Optik

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Phase control of gain and dispersion in an open V-type system

Cited by 11 publications

References 29 publications

Phase control of gain and dispersion in an open lambda-type inversionless lasing system

Phase control of gain and dispersion in an open lambda-type inversionless lasing system

Effect of exit and injection rates on phase-dependent transient evolution of gain without inversion

Group velocity of the light pulse in an open V-type system

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