Optical modulators

Optical modulators

Devices that serve to vary some property of a light beam. The direction of the beam may be scanned as in an optical deflector, or the phase or frequency of an optical wave may be modulated. Most often, however, the intensity of the light is modulated.

Rotating or oscillating mirrors and mechanical shutters can be used at relatively low frequencies (less than 105 Hz). However, these devices have too much inertia to operate at much higher frequencies. At higher frequencies it is necessary to take advantage of the motions of the low-mass electrons and atoms in liquids or solids. These motions are controlled by modulating the applied electric fields, magnetic fields, or acoustic waves in phenomena known as the electrooptic, magnetooptic, or acoustooptic effect, respectively. See Acoustooptics, Electrooptics, Kerr effect, Magnetooptics

Optical modulators

Devices that serve to vary some property of a light beam. The direction of the beam may be scanned as in an optical deflector, or the phase or frequency of an optical wave may be modulated. Most often, however, the intensity of the light is modulated.

Rotating or oscillating mirrors and mechanical shutters can be used at relatively low frequencies (less than 105 Hz). However, these devices have too much inertia to operate at much higher frequencies. At higher frequencies it is necessary to take advantage of the motions of the low-mass electrons and atoms in liquids or solids. These motions are controlled by modulating the applied electric fields, magnetic fields, or acoustic waves in phenomena known as the electrooptic, magnetooptic, or acoustooptic effect, respectively.

References in periodicals archive ?
The live demonstration will show the electrical time domain output waveform with 64Gbaud PAM4 modulated signal, corresponding to an electrical domain signal to convert a 64QAM optical signal in succeeding optical modulators.
aXenic designs highspeed optical modulators, which are used to link satellites in space with those on Earth.
UKPRwire, Mon Feb 23 2015] Silicon Photonics Market by Product (Photonic Wavelength, Optical Modulators, Optical Interconnects, WDMF, LED, and Others), Application (Telecommunication, Data Communication, and Others) and by Geography - Global Trends and Forecasts to 2014 - 2020
While Wavelength division multiplexer filters and Optical modulators are relatively mature product segments, Silicon LED's and Optical modulators are expected to grow at higher CAGRs during the forecast period.
Popovic and his colleagues created two different optical modulators -- structures that detect electrical signals and translate them into optical waves -- that can be fabricated within the same processes already used in industry to create today's state-of-the-art electronic microprocessors.
Popovic and his colleagues created two different optical modulators -structures that detect electrical signals and translate them into optical waves - that can be fabricated within the same processes already used in industry to create today's state-of-the-art electronic microprocessors.
The Company offers a high performance MMIC solutions that enable next generation wireless microwave systems up to 90GHz and drivers, TIAs and TFPS optical modulators for 40 Gbps and 100 Gbps fiber-optic telecommunications and data-communications networks.
Optical modulators are devices that can load information onto carrier light waves, either by intensity, phase, or polarizations.
They will describe how IBM was able to build optical modulators and photodetectors on a single silicon chip, using standard 90-nanometer semiconductor fabrication techniques — an industry first, they claim.
The first sub-100nm technology that allows the monolithic integration of optical modulators and germanium photodetectors as features into a current 90nm base high-performance logic technology node is demonstrated.
This collection of twenty four articles on optical network transmission technologies provides detailed information for engineers and engineering students on the technical specifications, history of development, and the state of the art in the world of optical modulators.
Hittite introduced two SMT optical modulator drivers, which operate from DC to 20 GHz, and are designed to drive Lithium Niobate Mach-Zehnder (MZ) and Electro-Absorptive (EA) optical modulators with up to 8 Vp-p signals, while exhibiting low additive RMS jitter.