Electrically Tunable Slow and Fast Light using Coherent Population Oscillations in Quantum Dot Semiconductor Optical Amplifier
-
A. Rostami
and
H. Rasooli
Abstract
Coherent population oscillations (CPO) in quantum dots (QDs) have been utilized in this article to achieve slow and fast light effects in a semiconductor optical amplifier. These phenomena have been achieved based on a pump-probe scheme and tuning the input current source. Coupled rate equations have been developed to determine the carrier dynamics and occupation probabilities. The effects of barrier, wetting layer and excited state densities have been included for CPO phenomenon occurring between the ground states. A quantum disc model embedded in another disc has been assumed for modeling the QDs and density matrix elements are used to obtain induced polarization at the signal frequency after determining the energy states and state probabilities. Tunable absorption dip, corresponding refractive index variation and group index, exhibit widely tunable slow and fast light characteristics by changing the bias condition.
©[2013] by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Masthead
- Electrically Tunable Slow and Fast Light using Coherent Population Oscillations in Quantum Dot Semiconductor Optical Amplifier
- Synchronizations of Quasi-period and Hyperchaos in Injected Two-section Semiconductor Lasers
- Enhanced Performance of Ethernet Passive Optical Networks using Dispersion Compensation
- Simultaneous Generations of Independent Millimeter Wave and 10 Gbit/s Wired Signal by Single Electrode Modulator in TDM-PON Network
- Bit Error Rate Analysis of RoF Systems Based on 16-QAM Including the Impact of Dispersion and Phase Noise
- Accurate Estimate of Some Propagation Characteristics for the First Higher Order Mode in Graded Index Fiber with Simple Analytic Chebyshev Method
- Limited Range Wavelength Converter Based PLI-Signal Quality RWA (PLI-SQRWA) Algorithm for Translucent Optical Wavelength Division Multiplexed (WDM) Networks
- Propagation Characteristics of Single-mode Step Index Linear and Non-linear Optical Fiber involving Improved Lorentzian Approximation for the Fundamental Mode
- Bandgap Management in Two-dimensional Photonic Crystal Thue-Morse Structures
- News
