Role of incoherent pumping and Er
                    <sup>3+</sup>
                    ion concentration on subluminal and superluminal light propagation in Er
                    <sup>3+</sup>
                    -doped YAG crystal

Asadpour, Seyyed Hossein; Soleimani, H. Rahimpour

doi:10.1088/1674-1056/24/1/014204

Cited by 8 publications

(4 citation statements)

References 86 publications

(93 reference statements)

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“…Zharikov et al first observed the stimulated emission from Er 3 + ions in the YAG crystal [45]. Since then many kinds of quantum optical phenomena have been studied in Er 3 + -doped YAG crystal, such as electromagnetically induced transparency [46], large refractive index without absorption [47], lasing without inversion [48], subluminal and superluminal light propagation [49], giant Kerr nonlinearity [50], optical bistability [51,52] and electromagnetically induced grating [53]. So far, to the best of our knowledge, studies have not been extended to the investigation of the coherent control of GH shift in an Er 3 + -doped YAG crystal.…”

Section: Introductionmentioning

confidence: 99%

Controllable Goos–Hänchen shift and optical switching in an Er^3 +-doped yttrium aluminum garnet crystal

Chen¹,

Shui²,

Meng³

et al. 2021

Laser Phys. Lett.

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We propose an efficient scheme to control Goos–Hänchen (GH) shifts of the reflected and transmitted beams in a cavity containing Er3 + -doped yttrium-aluminum-garnet (YAG) crystal with a four-level Er3 + ionic system. It is found that both the values and signs of the reflected and transmitted GH shifts can be coherently controlled by tuning the relevant optical parameters, such as the incoherent pumping rate, and the intensity and detuning of the driving field. Furthermore, we propose a scheme for such a configuration of the reflected GH shift as a family of reflection-type optical switchings. It is shown that the average port spacing and reflectivity of the optical switching can reach approximately 1.03 mm and 16.88, respectively, which indicate the high performance of switching function. Our proposal may provide a possibility to implement optically tuned optical switching.

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Section: Introductionmentioning

confidence: 99%

Controllable Goos–Hänchen shift and optical switching in an Er^3 +-doped yttrium aluminum garnet crystal

Chen¹,

Shui²,

Meng³

et al. 2021

Laser Phys. Lett.

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“…In 2013, slow and fast light via twowave mixing in an ytterbium-doped fiber at 1064 nm were investigated in detail [14]. In 2015, Asadpour et al showed that the reflected and transmitted pulses can be tuned from subluminal to superluminal at different wavelengths by changing the spin coherence in the defect dielectric medium [15]. Wang shows that the higher input power or higher optical gain is better for optical signal processing and optical telecommunications [16].…”

Section: Introductionmentioning

confidence: 99%

Research on the effects of dual pumping on fast light propagation in an Er³⁺-doped optical fiber

Qiu¹,

Gao²,

Wu³

et al. 2019

Laser Phys. Lett.

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In this paper, we propose a general theory for the coherent population oscillation effect in an Er 3+ -doped optical fiber under dual-frequency laser pumping at room temperature. We aim at comparing the effect of dual pumping (1480 nm and 980 nm) with single pumping of 980 nm and single pumping of 1480 nm on time advancement. According to the numerical calculations, we analyze the relationships between relative modulation attenuation and modulation frequency, plus fractional advancement and modulation frequency under the dualfrequency pumping laser with co-propagation. Compared to single pumping, a greater change in the group refractive index can be found. The maximum time advancement of 0.24 ms under a dual-frequency pump laser with co-propagation is obtained. Moreover, we demonstrate the influence of the pump ratio M on time advancement with modulation frequencies of 40 Hz, 100 Hz and 200 Hz. The ability to control the group velocity of light could have an important application for photonics.

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“…While it is known that negative group delay is found in many types of circuits and medium [7][8][9][10][11][12], it was initially unclear if negative propagation of signal occurs in such circuits or medium. Indeed, to date, several studies have revealed that negative group delay is not involved with the negative propagation of signal [13][14][15] and that the observed negative propagation is the result of signal distortion.…”

Section: Introductionmentioning

confidence: 99%

The propagation of pulse in dispersive linear systems

Wang

Feng

2017

IET Microwaves, Antennas & Propagation

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Through investigating the phenomenon of amplitude–phase interaction, the authors present a detailed study on the propagation of signal with a sinusoidal envelope in dispersive systems. With respect to the pulse signal, the phase delay of the base‐band signal was previously defined to characterise the frequency tone delay in the base‐band signal spectrum. However, comparing the phase delay of the base‐band signal with the group delay has enabled the physical meaning of the group delay to be clarified. Of particular relevance, they observe that the frequency tone delay with frequency tends to zero in the spectrum of the base‐band signal, rather than the delay expected of a group of frequency tones. With this new definition in place, they developed a new method for the precise analysis of signal propagation, which importantly has a capacity to show details in relation to both the envelope distortion and the phase distortion of the carrier.

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Role of incoherent pumping and Er ³⁺ ion concentration on subluminal and superluminal light propagation in Er ³⁺ -doped YAG crystal

Cited by 8 publications

References 86 publications

Controllable Goos–Hänchen shift and optical switching in an Er^3 +-doped yttrium aluminum garnet crystal

Controllable Goos–Hänchen shift and optical switching in an Er^3 +-doped yttrium aluminum garnet crystal

Research on the effects of dual pumping on fast light propagation in an Er³⁺-doped optical fiber

The propagation of pulse in dispersive linear systems

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Role of incoherent pumping and Er 3+ ion concentration on subluminal and superluminal light propagation in Er 3+ -doped YAG crystal

Cited by 8 publications

References 86 publications

Controllable Goos–Hänchen shift and optical switching in an Er3 + -doped yttrium aluminum garnet crystal

Controllable Goos–Hänchen shift and optical switching in an Er3 + -doped yttrium aluminum garnet crystal

Research on the effects of dual pumping on fast light propagation in an Er3+-doped optical fiber

The propagation of pulse in dispersive linear systems

Contact Info

Product

Resources

About

Role of incoherent pumping and Er ³⁺ ion concentration on subluminal and superluminal light propagation in Er ³⁺ -doped YAG crystal

Controllable Goos–Hänchen shift and optical switching in an Er^3 +-doped yttrium aluminum garnet crystal

Controllable Goos–Hänchen shift and optical switching in an Er^3 +-doped yttrium aluminum garnet crystal

Research on the effects of dual pumping on fast light propagation in an Er³⁺-doped optical fiber