Topic
Equilibrium mode distribution
About: Equilibrium mode distribution is a research topic. Over the lifetime, 928 publications have been published within this topic receiving 14939 citations.
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17 Mar 2002
TL;DR: In this paper, a stable single-fundamental mode VCSEL with a maximum output power of 3.2 and 4.4 mW at room temperature and -7C respectively was demonstrated.
Abstract: In conclusion, we have demonstrated a stable single-fundamental mode VCSEL with a maximum output power of 3.2 and 4.4 mW at room temperature and -7C respectively. The single mode operation was obtained using a higher order mode absorber formed by Zn diffusion with a mode suppression ratio better than 30 dB. With optimization on the device structure a single mode output power larger than 5 mW.
4 citations
TL;DR: In this article, the authors investigate the state of mode coupling in a multimode step-index plastic photonic crystal fiber (SI PPCF) with a solid core by solving the time-independent power flow equation.
4 citations
Patent•
05 Nov 1990
TL;DR: In this paper, the authors proposed to branch the optical power of an incident waveguide to two outgoing waveguide in stable and uniform manner by irradiating the high order mode and leaky mode for the propagation of the incident waveguides in a Y-branched light circuit into a substrate in a low equivalent refractive index waveguide part and propagating only the basic ground mode into a branched part.
Abstract: PURPOSE:To branch the optical power of an incident waveguide to two outgoing waveguide in stable and uniform manner by irradiating the high order mode and leaky mode for the propagation of the incident waveguide in a Y-branched light circuit into a substrate in a low equivalent refractive index waveguide part and propagating only the basic ground mode into a branched part. CONSTITUTION:An incident waveguide 1 and an outgoing waveguides 2 and 3 are the straight line waveguides, and these waveguides are connected so as to cross in Y-figure form in a branched part 4. Since the high order mode and leaky mode for the propagation in the incident waveguide 1 are irradiated in a substrate 5 by a low equivalent refractive index waveguide passage part 6, and since only the basic ground mode s propagated to the branched part 4, the optical power of the incident waveguide passage 1 can be branched uniformly into two outgoing waveguides. Accordingly, the branched ratio variation for the axis deflection incidence, preparation error of the waveguides 1-3 and the preparation dispersion is hardly generated, and the branching ratio of 50:50 or close to this value can be obtained within the wide wave length range.
4 citations
11 Nov 2014
TL;DR: In this paper, the authors investigate the mode coupling of a two-mode fiber based on the bending method and show that the coupling coefficient between LP 01 and LP 11 modes is an order of 2×10−3 km−1.
Abstract: We experimentally investigate the mode coupling of a two-mode fiber based on the bending method. The mode coupling coefficient between LP 01 and LP 11 modes of the two-mode fiber wound on a bobbin was an order of 2×10−3 km−1.
4 citations
01 Sep 2008
TL;DR: In this paper, the sought fields in terms of mode expansion with mode amplitudes being functions of time and longitudinal coordinate were presented, and a very good convergence of such a mode series was verified by direct FDTD calculation.
Abstract: The paper considers pulse propagation in a transverse inhomogeneous waveguide supporting a quasi-TEM wave. The calculation is based on presenting the sought fields in terms of mode expansion with mode amplitudes being functions of time and longitudinal coordinate (Mode Basis Method). In case of transverse inhomogeneous waveguide there is coupling between the modes. Meanwhile a very good convergence of such a mode series is shown here. The obtained solution was verified by direct FDTD calculation.
4 citations