Related Experiment Video
Updated: Jun 14, 2026

08:06
Design and Fabrication of an Optical Fiber Made of Water
Published on: November 8, 2018
Interrelationship between water absorption loss and dispersion in multimode fiber
Applied Optics
|March 24, 2010
Summary
Similar fiber optic bandwidth and loss spectra indicate high OH concentrations cause differential mode attenuation. This leads to bandwidth peaks coinciding with water absorption loss peaks.
Area of Science:
- Optical Fiber Communications
- Materials Science
- Spectroscopy
Background:
- Fiber optic performance is influenced by spectral characteristics.
- Understanding loss and bandwidth spectra is crucial for signal integrity.
- Water absorption (OH ion presence) is a known factor affecting optical fiber properties.
Purpose of the Study:
- To investigate the correlation between fiber bandwidth spectra and loss spectra.
- To identify the physical mechanisms responsible for observed spectral similarities.
- To understand the impact of hydroxyl (OH) ion concentration on optical fiber modal behavior.
Main Methods:
- Analysis of fiber bandwidth spectra.
- Measurement and analysis of fiber loss spectra.
- Utilizing wavelength-dependent far-field radiation patterns to probe modal behavior.
Main Results:
- Observed similarities between fiber bandwidth and loss spectra.
- Deduced that high central OH ion concentrations cause differential attenuation of low-order modes.
- Identified bandwidth peaks occurring at wavelengths corresponding to water absorption loss peaks.
Conclusions:
- High OH ion concentrations directly influence differential mode attenuation.
- The presence of OH ions explains the observed spectral similarities in bandwidth and loss.
- This finding has implications for designing and optimizing optical fibers for specific wavelength ranges.
Related Concept Videos
Propagation of Waves
When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Porosity and Absorption of Aggregate
Aggregates contain pores of varying sizes; while some are completely enclosed within the particles, others open onto the surface, allowing water to penetrate. The porosity of aggregates is a major factor contributing to the overall porosity of concrete, given that aggregates constitute about three-quarters of concrete's volume.
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the aggregate...
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the aggregate...
Lossless Lines
In electrical engineering, a lossless transmission line is characterized by a purely imaginary propagation constant and a resistive characteristic impedance. The ABCD parameters, which describe the relationship between the input and output voltages and currents, indicate an equivalent π circuit with an imaginary series impedance and a shunt admittance. This results in a transmission line that, when the product of the phase constant (beta) and the length of the line is less than pi, exhibits...
Adaptations that Reduce Water Loss
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
UV–Vis Spectroscopy: Beer–Lambert Law
The Beer-Lambert law describes the relationship between absorbance and concentration, which combines the principles established by scientists Johann Heinrich Lambert and August Beer. Lambert's law states that when light passes through a medium, the loss in intensity is directly proportional to the original intensity and the path length of the light. Beer's law proposed that the transmittance of a solution remains constant if the product of concentration and path length is constant. The modern...

