Related Experiment Video
Updated: Feb 6, 2026

14:18
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
11.9K
DD-OFDM transmission over few-mode fiber based on direct vector mode multiplexing
Optics Express
|August 17, 2018
Summary
This study demonstrates fiber vector eigenmode based mode division multiplexing using cylinder vector beams over few-mode fiber. This technology shows potential for high-capacity short-reach optical interconnects.
Area of Science:
- Optical Communications
- Photonics
- Signal Processing
Background:
- Mode division multiplexing (MDM) enables higher data transmission capacity.
- Cylinder vector beams (CVBs) offer unique polarization properties for optical transmission.
Purpose of the Study:
- To demonstrate vector mode division multiplexing (VMDM) using CVBs over few-mode fiber (FMF).
- To characterize the performance of CVBs after transmission through FMF.
- To achieve high-speed data transmission using VMDM without digital signal processing.
Main Methods:
- Generated CVBs using a q-plate (QP).
- Characterized CVB performance using high-order Poincaré sphere and polarization grating.
- Performed dual-vector-mode multiplexed transmissions with direct-detection orthogonal-frequency-division-multiplexing (DD-OFDM).
Main Results:
- Achieved minimum mode isolations of 16.8 dB (5 m) and 12.5 dB (100 m) between TM01 and TE01 modes.
- Demonstrated 96 Gb/s transmission over 5 m and 48 Gb/s over 100 m FMF.
- Successfully transmitted data without multiple-input multiple-output (MIMO) digital signal processing (DSP).
Conclusions:
- CVB-based VMDM over FMF is a viable technology for optical interconnects.
- The demonstrated system offers a promising solution for large-capacity, short-reach optical communication.
- Elimination of MIMO-DSP simplifies the system architecture for practical applications.
More Related Videos
Related Concept Videos
What is a Mode?
26.3K
The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set.
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
26.3K
Ventilatory Modes
1.6K
Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure.
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
1.6K
Modes of Standing Waves - I
4.1K
A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This...
4.1K
Modes of Standing Waves: II
1.8K
The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end....
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end....
1.8K
MOSFET: Enhancement Mode
829
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
829
Modes of Operations of BJT
2.0K
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...
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...
2.0K

