The Important Role of Epson Differential Crystal Oscillators in Optical Modules

Jun 03,2024
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Optical modules are an important component of modern communication equipment, mainly used for photoelectric conversion and signal transmission. They are devices that convert optical signals into electrical signals, or convert electrical signals into optical signals. In fiber optic communication, optical modules play a crucial role.

The main components of an optical module include a light source, a light receiver, optical components, and circuit chips. Among them, the light source is the component that emits light signals, and the optical receiver is the component that receives light signals and converts them into electrical signals. Optical components include lenses, reflectors, etc., used to control the direction and shape of light propagation, while circuit chips include power circuits, driving circuits, and signal processing circuits, etc., used to control the operation of the entire optical module. Among them, crystal oscillators, as frequency stable components, play a crucial role in optical module circuit chips.

Crystal oscillators can be divided into two categories: quartz crystal resonators and oscillators. For chip types, the cost proportion is not high, but don't underestimate this crystal oscillator component. Crystal oscillators play an important role in optical modules, as they can generate stable clock signals and frequency control, thereby providing the speed of the optical module, increasing communication distance, and providing bandwidth. For optical modules, the accuracy and stability of crystal oscillators directly affect the performance and reliability of the modules.

In optical modules, the main function of crystal oscillators is to provide clock signals and frequency control. The clock signal is the foundation of data transmission in optical modules, which controls the transmission rate and mode of data. Frequency control can ensure the stability and reliability of the optical module during high-speed data transmission. The accuracy and stability of crystal oscillators are crucial for the performance and reliability of optical modules. If the accuracy of the crystal oscillator is not high enough, it will lead to unstable transmission rate of the optical module, affecting the quality and reliability of data transmission. If the stability of the crystal oscillator is not good enough, it will cause the optical module to malfunction or be damaged during long-term operation. Therefore, in optical fiber communication, differential crystal oscillator is the best choice, and what are the excellent characteristics of differential crystal oscillator.

1. Excellent noise resistance: Due to the differential crystal oscillator outputting two signals with opposite phases, they have a stronger ability to suppress common mode noise.

Therefore, differential crystal oscillators have higher noise resistance compared to other types of crystal oscillators.

2. Lower phase noise: Due to the two crystal oscillators of the differential crystal oscillator having opposite phases, their phase noise can cancel each other out. Therefore, differential crystal oscillators have lower phase noise compared to other types of crystal oscillators.

3. Higher common mode suppression rati Differential crystal oscillators have a higher common mode suppression ratio, which can avoid interference from common mode noise on the output signal of the crystal oscillator. 4. Temperature stability: Due to the fact that the two crystal oscillators of the differential crystal oscillator are in the same package, they are subjected to the same temperature changes. Therefore, differential crystal oscillators have higher temperature stability compared to other types of crystal oscillators.

The frequency points of differential crystal oscillators commonly used in optical modules are: 50mhz; 80mhz; 100mhz; 125MHZ; 156.25mhz; 200mhz.: The Epson Crystal Oscillator has launched a high-precision, small differential output series for high-frequency response below 700MHz. The Japanese EPSON Epson Crystal Oscillator industrial grade LVDS output differential crystal oscillator has SG7050VAN, SG3225VAN、SG5032VAN、SG2016VHN、SG2016VGN、SG2520VHN、SG2520VGN、SG3225VEN、SG5032VEN、SG7050VEN.

Japanese EPSON Epson industrial grade LV-PECL output differential crystal oscillator models include SG2016EHN SG2016EGN、SG2520EHN、SG2520EGNSG3225EEN、SG5032EEN、SG7050EEN、SG3225EAN、SG5032EAN、SG7050EAN

Japanese EPSON Epson industrial grade HCSL output differential crystal oscillator models include SG2016HHN SG2016HGN、SG2520HHN、SG2520HGN.SG3225HBN.

In summary, differential crystal oscillators have many excellent characteristics in optical fiber communication, which make them the best choice for optical fiber communication systems. In the future, with the continuous development of optical fiber communication technology, differential vibration will be widely used in more application fields.