Topic
Mode scrambler
About: Mode scrambler is a research topic. Over the lifetime, 896 publications have been published within this topic receiving 13595 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, a simple optical technique is described for the measurement of complex mode amplitudes in multimode fibers, which involves launching a laser beam into the core of low moded optical fiber, exciting a mixture of normal modes.
Abstract: A simple optical technique is described for the measurement of complex mode amplitudes in multimode fibers. The
technique used in this experiment involves launching a laser beam into the core of low moded optical fiber, exciting a
mixture of normal modes. The emerging mode patterns are stored in microcomputer. The complex modes are then
extracted from these recoded intensities with help of modified version of Gerchberg-Saxton algorithm. Many
experimental results are recorded in photographic form and comparison with computer analyzed pattern is made. The
evaluation of complex mode amplitudes in multimode fiber can yield useful information about the mode filling of such
fiber.
1 citations
TL;DR: In this paper, the authors discuss the polarization-dependent mode conversion in an adiabatic submicron SOI optical waveguide tapers and the application to realize polarization rotation with simple fabrication processes.
Abstract: Submicron silicon-on-insulator (SOI) optical waveguides, which has ultra-high index contrast and ultra-small cross section, provide a very promising way to realize nano-photonic integrated circuits (PICs) with high integration density. Mode conversion and coupling play an important role for realizing various functionality elements. In this paper, a review is given for our recent work including the following parts. First, we discuss the polarizationdependent mode conversion happening in an adiabatic submicron SOI optical waveguide tapers and the application to realize polarization rotation with simple fabrication processes. Second, the mode coupling/conversion in an asymmetrical directional coupler (ADC) is summarized. The application for ADCs includes the realization of ultrasmall polarization-beam splitters (PBS) as well as ultra-compact broadband mode multiplexers (which is very important to enable ultra-high speed optical interconnects with a multimode optical waveguide).
1 citations
TL;DR: In this article, the mechanism of coherence collapse by mode instability is theoretically analyzed and demonstrated with an unbalanced fiber Michelson interferometer utilizing phase modulation, which is illuminated by a single-frequency erbium-doped fiber ring laser.
Abstract: Mode instability acts as a common feature in single-frequency fiber ring lasers. The mechanism of coherence collapse by mode instability is theoretically analyzed and demonstrated with an unbalanced fiber Michelson interferometer utilizing phase modulation, which is illuminated by a single-frequency erbium-doped fiber ring laser. Multiform mode instability phenomena accompanied with coherence collapse are observed and discussed in detail by tracing the dynamics of the interference fringe visibility. The results show that mode instability would introduce extra phase noises like a false alarm to interferometric fiber optic sensing systems.
1 citations
01 Feb 1992
TL;DR: In this article, the authors performed quantitative experiment on the major elements which are thought to influence light propagation of thermally fused biconical taper single mode optical fiber couplers.
Abstract: Since the light propagation property of the currently produced single mode optical fiber couplers has not become clarified, there are various problems with their production method, namely in terms of their operability, stability, reproducibility and durability. The main purpose of this paper is to perform quantitative experiment on the major elements which is thought to influence light propagation of thermally fused biconical taper single mode optical fiber couplers. Furthermore, this paper aims to clarify light propagation property of single mode optical fiber couplers by calculating light output using mode coupled theory, in attempt to improving their production method.
1 citations
TL;DR: In this paper, a ring-shaped single-mode field pattern at Stokes wavelengths of backward stimulated Raman scattering in a multimode fiber is reported for the first time and some other novel experimental and numerical results are presented to explain the mechanism.
Abstract: The observation of a ring-shaped single-mode field pattern at Stokes wavelengths of backward stimulated Raman scattering in a multimode fiber is reported for the first time. This phenomenon and some other novel experimental and numerical results are presented to explain the mechanism. It has been proved that self-focusing plays little role in the formation of the ring-shaped structure. The ring-shaped pattern is attributed to the refractive index profile of the fiber used in the experiment. It corresponds to the fundamental mode of the fiber and mode competition causes the Stokes waves to propagate in the fundamental mode.
1 citations