This section provides an overview for optical modulators as well as their applications and principles. Also, please take a look at the list of 10 optical modulator manufacturers and their company rankings.
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An optical modulator is a device that converts an electrical signal into an optical signal for output, also called an E/O converter (or O/E converter for the reverse conversion), and is mainly used as part of an optical transmission device in fiber-optic communications.
In conventional systems, the signal used for transmission is always an electrical signal. To achieve optical communication over optical fiber, electrical signals must generally be used to modulate the light source in some way and output as an optical signal. The device that plays this role is an optical modulator.
This section describes the uses of optical modulators.
Optical modulators play an extremely important role in optical fiber communications, which are now the foundation of information transmission.
Optical fiber communication is an optical communication method that enables high-speed and long-distance transmission by using optical fiber, which has excellent performance in terms of low loss and wide bandwidth, as a communication line. To introduce this method, a device capable of fluidly exchanging electrical and optical signals is required. The optical modulators were developed for this purpose.
This section describes the principle of optical modulators.
There are two types of methods for converting electrical signals into optical signals: "direct modulation method" and "external modulation method." Of these, the external modulation method is the one that uses optical modulators to perform the conversion.
There are also various methods of altering light from a light source by an external force, such as electrical engineering effects, acousto-optical effects, magneto-optical effects, and thermal engineering effects.
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