Related Experiment Video
Updated: Jun 20, 2026

09:43
Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
Acousto-optic frequency shifting in birefringent fiber
Optics Letters
|September 2, 2009
Summary
Single-sideband frequency shifting was achieved using acoustic waves to alter light polarization in birefringent fiber. This method effectively generates upper and lower sidebands with high suppression ratios.
Area of Science:
- Photonics
- Acousto-optics
- Fiber optics
Background:
- Optical frequency shifting is crucial for various photonic applications.
- Controlling light polarization and frequency simultaneously presents a significant challenge.
Purpose of the Study:
- To demonstrate single-sideband frequency shifting using acoustic waves.
- To couple orthogonal polarizations in birefringent fiber for frequency manipulation.
Main Methods:
- Utilized traveling acoustic waves (surface and bulk) to induce coupling between orthogonal polarizations in birefringent fiber.
- Applied acoustic waves to shift the frequency of light based on the acoustic wave frequency.
Main Results:
- Achieved single-sideband frequency shifting with distinct upper and lower sidebands generated in orthogonal polarizations.
- Demonstrated sideband suppression exceeding 30 dB.
- Attained carrier suppression greater than 20 dB below the desired sideband.
Conclusions:
- Traveling acoustic waves provide an effective method for single-sideband frequency shifting in birefringent fibers.
- The technique offers high levels of sideband and carrier suppression, suitable for advanced optical systems.
More Related Videos
Related Concept Videos
Properties of Fourier Transform II
The Fourier Transform (FT) is an essential mathematical tool in signal processing, transforming a time-domain signal into its frequency-domain representation. This transformation elucidates the relationship between time and frequency domains through several properties, each revealing unique aspects of signal behavior.
The Frequency Shifting property of Fourier Transforms highlights that a shift in the frequency domain corresponds to a phase shift in the time domain. Mathematically, if x(t) has...
The Frequency Shifting property of Fourier Transforms highlights that a shift in the frequency domain corresponds to a phase shift in the time domain. Mathematically, if x(t) has...
Doppler Effect - II
The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
The Cochlea
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
Aliasing
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original signal...
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original signal...
NMR Spectroscopy: Chemical Shift Overview
The position of the absorption signal of a sample is reported relative to the position of the signal of tetramethylsilane (TMS), which is added as an internal reference while recording spectra. The difference between the absorption frequencies of the sample and TMS (in Hz) is divided by the spectrometer operating frequency (in MHz) to obtain a dimensionless quantity called the chemical shift. It is reported on the δ (delta) scale and expressed in parts per million.
For instance, the proton...
For instance, the proton...
