Principle analysis of photoelectric module Mach Zehnder modulator

First, the basic concept of Mach Zehnder modulator

Mach-Zehnder modulator is an optical modulator used to convert electrical signals into optical signals. Its working principle is based on the electro-optical effect, through the electric field to control the refractive index of light in the medium to achieve light modulation, is to divide the input light into two equal signals into the two optical branches of the modulator.
The materials used in these two optical branches are electro-optical materials, whose refractive index varies with the size of the externally applied electrical signal. Since the refractive index change of the optical branch will cause the signal phase change, when the output end of the two branch signal modulator is combined again, the synthesized optical signal will be an interference signal with a change in intensity, which is equivalent to converting the change of the electrical signal into a change of the optical signal, and realizing the modulation of the light intensity. In short, the modulator can realize the modulation of different side bands by controlling its bias voltage.

Second, the role of Mach Zehnder modulator

Mach-Zehnder modulator are mainly used in optical fiber communication and other fields. In fiber optic communications, digital signals need to be converted into optical signals for transmission, and Machzender modulators can convert electrical signals into optical signals. Its role is to achieve high-speed and high-quality signal transmission in optical fiber communication systems.

The Mach Zehnder modulator can also be used for experimental research in the field of optoelectronics. For example, it can be used to make coherent light sources and to implement single-photon operations.

Third, the characteristics of Mach Zehnder modulator

1. Mach Zehnder modulator can convert electrical signals into optical signals to achieve high-speed, high-quality signal transmission.

2. When the modulator is working, it needs to be used with other devices such as light sources, light detectors, etc., to form a complete optical fiber communication system.

3. Mach Zehnder modulator has the characteristics of fast response speed and low power consumption, which can meet the needs of high-speed communication.

【 Conclusion 】

A Mach Zehnder modulator is an optical modulator used to convert an electrical signal into an optical signal. Its role is to achieve high-speed, high-quality signal transmission in areas such as optical fiber communication. Mach zender modulator has the characteristics of fast response and low power consumption, and is one of the indispensable devices in optical fiber communication system.