Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Video

Updated: Apr 15, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

10.4K

Advanced coding techniques for few mode transmission systems.

Chigo Okonkwo, Roy van Uden, Haoshuo Chen

    Optics Express
    |April 4, 2015
    PubMed
    Summary
    This summary is machine-generated.

    Related Concept Videos

    Transmission-Line Differential Equations01:26

    Transmission-Line Differential Equations

    1.1K
    Transmission lines are essential components of electrical power systems. They are characterized by the distributed nature of resistance (R), inductance (L), and capacitance (C) per unit length. To analyze these lines, differential equations are employed to model the variations in voltage and current along the line.
    Line Section Model
    A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured...
    1.1K
    Transmission Line Design Considerations01:23

    Transmission Line Design Considerations

    771
    Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
    771
    Design of Transmission Shafts01:16

    Design of Transmission Shafts

    930
    The design of a transmission shaft is governed by two primary specifications: the power it transmits and its rotational speed. These parameters guide the selection of the shaft's material and cross-sectional dimensions, ensuring that the material's maximum shearing stress remains within the elastic limit while transmitting the desired power at the given speed. The system's power is intrinsically linked to the applied torque. The torque applied to the shaft can be calculated by reconfiguring the...
    930
    Transmission Shafts: Problem Solving01:09

    Transmission Shafts: Problem Solving

    616
    Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
    Next, use bending moment diagrams for the shaft to...
    616
    Simplified Synchronous Machine Model01:30

    Simplified Synchronous Machine Model

    926
    The Synchronous Machine Model is a fundamental tool in analyzing and ensuring the transient stability of power systems. This model simplifies the representation of a synchronous machine under balanced three-phase positive-sequence conditions, assuming constant excitation and ignoring losses and saturation. The model is pivotal for understanding the behavior of synchronous generators connected to a power grid, particularly during transient events.
    In this model, each generator is connected to a...
    926
    Modes of Operations of BJT01:21

    Modes of Operations of BJT

    2.4K
    A Bipolar Junction Transistor (BJT) is a versatile component in electronics, functioning in four distinct modes based on the biasing of its junctions: active, saturation, cut-off, and inverted modes.
    Active Mode: The most common mode for amplification, the active mode features a forward-biased emitter-base junction and a reverse-biased base-collector junction. This setup enables electrons to be injected from the emitter to the base while blocking the majority carriers at the collector. The...
    2.4K

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    A critical analysis of deployed use cases for quantum key distribution and comparison with post-quantum cryptography.

    EPJ quantum technology·2025
    Same author

    Reaching the pinnacle of high-capacity optical transmission using a standard cladding diameter coupled-core multi-core fiber.

    Nature communications·2025
    Same author

    320 Gbps co-planar stripline Mach-Zehnder modulator on a generic indium phosphide integrated photonics platform.

    Optics express·2025
    Same author

    Experimental assessments of a coherent DSCM and SOA-based WDM metro-access network architecture with enhanced flexibility and capacity.

    Optics letters·2025
    Same author

    Metasurface on integrated photonic platform: from mode converters to machine learning.

    Nanophotonics (Berlin, Germany)·2024
    Same author

    Optical integrated reconfigurable mode generator-multiplexer for radio-frequency orbital angular momentum.

    Optics express·2024
    Same journal

    Long-term stabilization of intensity-difference squeezing from four-wave mixing in rubidium vapor.

    Optics express·2026
    Same journal

    Robust 3D topography measurement of large-range high-aspect-ratio structures based on dual-domain statistical filtering in SD-OCT.

    Optics express·2026
    Same journal

    Broadband transmissive terahertz metasurface for simultaneous quad-mode OAM multiplexing.

    Optics express·2026
    Same journal

    Leveraging two-dimensional materials for high-sensitivity optical sensors: quasi-bound states in the continuum within hybrid metasurfaces.

    Optics express·2026
    Same journal

    Resolution investigation for dual-spherical-wave optical scanning holographic microscopy: methods and performance.

    Optics express·2026
    Same journal

    Robustness of parallel subnetwork-filtered diffractive deep neural networks.

    Optics express·2026
    See all related articles

    Advanced coding schemes like space-time coding and 4D modulation significantly boost performance in few-mode fiber transmission systems. These techniques enhance optical signal-to-noise ratio tolerance, improving data transmission quality.

    Area of Science:

    • Optical Communications
    • Information Theory
    • Signal Processing

    Background:

    • Few-mode fibers (FMF) offer potential for increased data capacity through spatial division multiplexing (SDM).
    • Optical signal-to-noise ratio (OSNR) is a critical parameter limiting transmission performance.
    • Advanced coding and modulation schemes are essential for overcoming transmission impairments.

    Purpose of the Study:

    • To experimentally verify the performance enhancement of advanced coding schemes in a 3-mode FMF transmission system.
    • To evaluate the OSNR tolerance gain of space-time block codes (STBCs) in multi-input multi-output (MIMO) optical systems.
    • To assess the benefits of 4-dimensional (4D) modulation formats for improving spectral efficiency and transmission quality.

    Main Methods:

    More Related Videos

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo
    09:36

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo

    Published on: March 19, 2016

    8.4K
    Generation and Coherent Control of Pulsed Quantum Frequency Combs
    06:42

    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

    9.8K

    Related Experiment Videos

    Last Updated: Apr 15, 2026

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

    Published on: March 20, 2017

    10.4K
    Characterization of Anisotropic Leaky Mode Modulators for Holovideo
    09:36

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo

    Published on: March 19, 2016

    8.4K
    Generation and Coherent Control of Pulsed Quantum Frequency Combs
    06:42

    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

    9.8K
  • Implementation of space-time coding and 4D modulation formats in a 3-mode SDM transmission system.
  • Experimental evaluation of performance gains using metrics such as OSNR tolerance at the hard-decision forward error correcting (HD-FEC) limit.
  • Comparison of performance between few-mode fiber systems and single-mode fiber systems, as well as conventional vs. 4D modulation schemes.

    • Main Results:

    • Significant OSNR gains of 3.2, 4.1, 4.9, and 6.8 dB demonstrated for DP-QPSK, 8-QAM, 16-QAM, and 32-QAM, respectively, at the HD-FEC limit.
    • Exploitation of spatial diversity in FMF led to substantial improvements over single-mode fiber performance.
    • 6 × 28Gbaud 128-QAM using 4D constellations outperformed conventional 8-QAM while achieving higher spectral efficiency (0.5 bit/symbol additional capacity).

    Conclusions:

    • Advanced coding schemes, specifically STBCs, effectively enhance OSNR tolerance in MIMO optical SDM systems.
    • 4D modulation formats offer a promising approach to increase spectral efficiency and transmission performance in FMF systems.
    • The experimental results confirm the advantage of employing sophisticated coding and modulation techniques for next-generation optical communication systems.