Gain-assisted superluminal propagation in coupled optical resonators

Chang, Hongrok; Smith, David D.

doi:10.1364/fio.2004.ftuj3

Cited by 5 publications

(8 citation statements)

References 2 publications

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“…The gain-assisted superluminal light propagation has been observed in gaseous systems [2]. It has been also theoretically reported in coupled optical resonators [3] and in a duplicated two-level system [4]. Slow and fast light propagation in solids at room temperature have also been realized based on the process of coherent population oscillations [5,6] and by using stimulated Brillouin scattering [7].…”

Section: Introductionmentioning

confidence: 99%

Gain-assisted superluminal light propagation through a Bose-Einstein condensate cavity system

2016

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The propagation of a probe laser field in a cavity optomechanical system with a Bose-Einstein condensate is studied. The transmission properties of the system are investigated and it is shown that the group velocity of the probe pulse field can be controlled by Rabi frequency of the pump laser field. The effect of the decay rate of the cavity photons on the group velocity is studied and it is demonstrated that for small values of the decay rates, the light propagation switches from subluminal to superluminal just by changing the Rabi frequency of the pump field. Then, the gain-assisted superluminal light propagation due to the cross-Kerr nonlinearity is established in cavity optomechanical system with a Bose-Einstein condensate. Such behavior can not appear in the pump-probe two-level atomic systems in the normal phase. We also find that the amplification is achieved without inversion in the population of the quantum energy levels.

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Section: Introductionmentioning

confidence: 99%

Gain-assisted superluminal light propagation through a Bose-Einstein condensate cavity system

2016

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“…Recently, much theoretical and experimental work [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16] has been carried out for enhancing the sensitivity of such devices using the superluminal effect. These studies considered both passive [1,3,4,5,6,7,9,10,12,13,14,15] and active [1,2,3,4,5,6,8,9,11,12] versions of the resonators. Furthermore, different physical mechanisms have been considered, in both active and passive cases, for realizing the anomalous dispersion that produces the superluminal effect.…”

Section: Introductionmentioning

confidence: 99%

Fast-Light Enhanced Brillouin Laser Based Active Fiber Optic Sensor for Simultaneous Measurement of Rotation and Strain

Zhou

Fouda

et al. 2017

J. Lightwave Technol.

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We have developed a conceptual design for an Active Fast Light Fiber Optic Sensor (AFLIFOS) that can perform simultaneously or separately as a gyroscope (differential mode effect) and a sensor for acceleration, strain, and other common mode effects. Two Brillouin lasers in opposite directions and separated in frequency by several free spectral ranges are used for this sensor. By coupling two auxiliary resonators to the primary fiber resonator, we produce superluminal effects for two laser modes.We develop a detailed theoretical model for optimizing the design of the AFLIFOS, and show that the enhancement factor of the sensitivity is ~187 and ~−187, respectively for the two Brillouin lasers under the optimized condition, when the effective change in perimeter of the primary fiber resonator is 0.1nm, corresponding to a rotation rate of 0.4 deg/sec for a ring resonator with radius 1m. It may be possible to get much higher enhancement by adjusting the parameters such as the perimeters and the coupling coefficients.

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“…In recent years, traveling wave microresonator (TWMR) structures [1] of various configurations [2][3][4][5][6][7][8][9][10][11][12][13] are used to realize the optical analogues of electromagnetically induced transparency (EIT) [14,15] and Fano resonance (FR) [16,17], which are known, respectively, as coupled-resonator-induced transparency (CRIT) and optical Fano resonance (OFR) in photonic systems. This ability to mimic atomic effects via TWMRs is highly useful as it is much easier to manipulate waveguide devices compared to atomic systems.…”

Section: Introductionmentioning

confidence: 99%

Enhanced coupled-resonator-induced transparency and optical Fano resonance via intracavity backscattering

Ang

Ngo

2012

J. Opt. Soc. Am. B

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We look into the use of the intracavity backscattering in twin-coupled traveling wave microresonators (TWMRs) to generate enhanced coupled-resonator-induced transparency (CRIT) and optical Fano resonance (OFR). Intracavity backscattering makes it possible to either generate a single CRIT peak or a pair of CRIT peaks within one free spectral range in the transmission spectrum. The distance between the twin-CRIT peaks can be tuned by controlling the intracavity backscattering strength. Also, the use of intracavity backscattering allows the simultaneous production of both fast and slow light effects. In addition, it is found that the symmetric CRIT peaks can be reshaped into asymmetric OFR line shapes either by using TWMRs with different intracavity backscattering strengths when one input is launched into the circuit or by modulating the phase/amplitude difference between the dual contrapropagating inputs, which are launched into the circuit in the presence of intracavity backscattering. These allow switching between CRIT and OFR to be realized in the absence of gain or phase tuning elements in the cavities, unlike conventional twin-coupled TWMR systems.

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Gain-assisted superluminal propagation in coupled optical resonators

Cited by 5 publications

References 2 publications

Gain-assisted superluminal light propagation through a Bose-Einstein condensate cavity system

Gain-assisted superluminal light propagation through a Bose-Einstein condensate cavity system

Fast-Light Enhanced Brillouin Laser Based Active Fiber Optic Sensor for Simultaneous Measurement of Rotation and Strain

Enhanced coupled-resonator-induced transparency and optical Fano resonance via intracavity backscattering

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