Article
Observation of stimulated Raman amplification in silicon waveguides.
Optics Express (impact factor:
3.59).
08/2003;
11(15):1731-9.
pp.1731-9
Source: PubMed
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Citations (0)
- Cited In (35)
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Article: Lasing Directionality and Polarization Behavior in Continuous-Wave Ring Raman Lasers Based on Micro-and Nano-Scale Silicon Waveguides
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ABSTRACT: A generic model is introduced to describe the lasing characteristics of continuous-wave circular and racetrack-shaped ring Raman lasers based on micro-and nano-scale silicon waveg-uides. This model explicitly takes into account the effective Raman gain values for forward and backward lasing in the ring resonator, the presence of a bus waveguide in which the Stokes laser radiation coupled out from the ring undergoes additional Raman amplifica-tion, and the spatial gain variations for different polarization states in the ring structure. I show numerically that ring lasers based on micro-scale waveguides generate unidirectional lasing in either the forward or backward direction because of an asymmetry in non-linear losses, whereas those based on nanowires yield only back-ward lasing due to a non-reciprocity in effective gain. Furthermore, the model indicates that backward lasing can yield a significantly higher Stokes output at the bus waveguide facets than lasing in the forward direction. Finally, considering a TE-polarized pump input for a (100) grown silicon ring Raman laser, I demonstrate nu-merically that the polarization state of the Stokes lasing radiation strongly depends on whether micro-scale or nano-scale waveguides are used.Journal of Lightwave Technology 07/2011; 29(14):2180-2190. · 2.78 Impact Factor -
Article: ALD-Assisted Multiorder Dispersion Engineering of Nanophotonic Strip Waveguides
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ABSTRACT: We propose a new technique for the multiorder dispersion engineering of nanophotonic strip waveguides. Unlike other techniques, the method does not require wafers with cus-tomized parameters and is fully compatible with standard wafers used in nanophotonics. The dispersion management is based on the application of nanometer-thick TiO layer formed by atomic layer deposition. The method is simple and reliable and allows good control of dispersion up to the fourth-order terms. The additional advantages are the reduction of propagation losses and partial compensation of fabrication tolerances.Journal of Lightwave Technology 01/2012; 30(1). · 2.78 Impact Factor -
Article: Influence of the group-velocity on the pulse propagation in 1D silicon photonic crystal waveguides
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ABSTRACT: We present a detailed analysis of the influence of the group velocity (GV) on the dynamics of optical pulses upon their propagation in one-dimensional photonic crystal waveguides (PhCW). The theoretical model used in our analysis incorporates the linear optical properties of the PhCW (GV dispersion and optical losses), free-carrier (FC) effects (FC dispersion and FC-induced optical losses) and nonlinear optical effects (Kerr nonlinearity and two-photon absorption). Our analysis shows that, unlike the case of uniform waveguides, the GV of the pulse, dispersion coefficients, and the waveguide nonlinear coefficient are periodic functions with respect to the propagation distance. We also demonstrate that linear and nonlinear effects depend on the group velocity, v g , as vg-1v_{g}^{-1} and vg-2v_{g}^{-2}, respectively.Applied Physics A 04/2012; 103(3):835-838. · 1.63 Impact Factor
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Keywords
Amplification
CW power
first observation
negligible
silicon waveguides
Silicon-on-Insulator
SRS
Stokes signal
waveguide
waveguides