optical switch

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optical switch

An all-optical fiber-optic switching device that maintains the signal as light from input to output. Traditional switches that connect optical fiber lines are electro-optic. They convert photons from the input side to electrons internally in order to do the switching and then convert back to photons on the output side.

Although some vendors call electro-optical switches "optical switches," true optical switches support all transmission speeds. Unlike electronic switches, which are tied to specific data rates and protocols, optical switches direct the incoming bitstream to the output port no matter what the line speed or protocol (IP, ATM, SONET) and do not have to be upgraded for any such changes. Optical switches may separate signals at different wavelengths and direct them to different ports.

Using tiny mirrors that reflect the input signal to the output port, MEMS technology is expected to be the prevailing method for building optical switches, also known as "photonic switches." There are various fabrication methods for building MEMS mirrors. See MEMS and transparent network.

MEMS-based Optical Switch
MEMS mirrors reflect the input signal to an output port without regard to line speed or protocol. This technology is expected to be the dominant method for building photonic switches.

MEMS Mirrors
An individual mirror in a MEMS-based switch can really fit through the proverbial "eye of a needle."
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References in periodicals archive ?
The optical switches market is also poised to reach a valuation of USD 8.61 billion by 2024 from USD 3.98 billion in 2018.
two-layer architecture gains in scalability over the one using one or multiple large-scale optical switches due to the fact that its total throughput solely depends on the switching capability of the core switching layer and the interconnection architecture of the small-and-fast optical switches, rather than the maximal number of switch ports as that in the other case such as [6-9].
Liu, "Nonliner control of a MEMS optical switch," 45rd IEEE Conf.
It consists of a set of optical switches similar to ACS's.
A number of different technologies are used in optical switches.
In effect, the test equipment setup shown in Figure 1 is a typical Mach-Zehnder interferometer formed from the two couplers and the two optical switches. The relatively large coherence length of the laser used, approximately 2 m, results in large variations in the level output from coupler 2.
[4.] Ridolfo, A., et al., "All optical switch of vacuum Rabi oscillations: The ultrafast quantum eraser," Phys.
NEC will continue to advance this research and development, seeking to commercialize optical switch devices equipped with these technologies by the close of the fiscal year ending in March 2014.
The optical switch is one of the most important fiber-optic components for seamlessly maintaining network survivability and providing a flexible signal-routing platform.
The company has partnered with Polatis to use its 80x80 optical switch module.

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