Photoelectric detection technology is one of the primary means of modern information acquisition. The development of photoelectric detection technology is developed with the development of other key technologies. Due to laser technology development, optical waveguide technology, photoelectric technology, optical fiber technology, computer technology, and the continuous emergence of new materials, new devices, and new processes, photoelectric detection technology has made significant progress. In

The amplification principle of EDFA is similar to that of laser production. The energy difference between the metastable state and the ground state of Er (3 +) doped in the light is equal to the energy of 1550nm photon. When the pump energy (980nm or 1480nm) of the appropriate wavelength is absorbed, the electron will transition from the ground state to the excited state with higher energy order.

 To further explore the application of atmospheric optical properties and optical transmission physics in the fields of laser technology, Atmospheric Exploration, and optical remote sensing, to explore the development of modern adaptive optical technology and its application in space exploration and astronomical observation, and to promote the sustained and rapid development of atmospheric optics and adaptive optical technology, the Chinese Academy of optical engineering, together with the Chine

The 2019 Asia Optical Communication Conference (ACP) was successfully concluded in Chengdu on November 5. ACP is now the largest conference on optical communication, photonics and related technologies in the Asia Pacific region. More than 1000 experts, scholars and students from 47 countries and regions participated in the conference. Meanwhile, more than 20 suppliers of optical communication devices and equipment were in the conference period The exhibition is a grand industry event with both a

With the continuous improvement of bandwidth, dynamic range, and noise coefficient of optical transceivers, optical fiber transmission links in radio telescope are common. Some high-performance radio telescopes at home and abroad have adopted optical fiber transmission systems to achieve high-quality microwave signal transmissions, such as ovens Valley array in the United States, GBT, EVLA, Nobeyama in Japan, even in South Korea, etc., as well as the world's largest "SkyEye" radio telescope inde

Laser Doppler radar is an exciting radar that uses a Doppler system to obtain target motion information. Because of the high coherence, monochromaticity, and directivity of laser, heterodyne detection is possible. The lidar, which receives the frequency shift information of laser Doppler and obtains the radial velocity component using the optical heterodyne detection technology, is called the coherent Doppler lidar.

In addition to the glass aspheric lens, there is a plastic aspheric lens. Plastic molding is the injection of molten plastic into an aspheric mold. Compared with glass, plastic has poor thermal stability and compression resistance, so it needs special treatment to obtain a similar aspheric lens. However, the plastic aspheric lens is characterized by low cost, lightweight, and easy to form, widely used in occasions with moderate optical quality, insensitive thermal stability, and low-pressure re

Kg ODL manual optical adjustable delay device is a portable device that can adjust the optical delay. It has the characteristics of high integration and low cost. The device can provide 330ps optical delay and realize accurate delay control through rotation control. With the length ruler marked on the panel, precise information of uncertainty can be read out immediately in mm or PS.

The kg-EDFA series products independently developed by conquering optoelectronics Co., Ltd. are fiber-optic power amplification equipment specially designed for laboratory and factory test environments. They are internally integrated with a high-performance pump laser, high gain erbium-doped fiber, and unique control and protection circuit, which realize low noise and high stability output. AGC, ACC, APC three working modes are optional and widely used in fiber sensing and optical fiber sensing

In the above three eye patterns, we analyze three situations that lead to lousy eye patterns: impedance mismatch, jitter, and noise. How can these three situations be seen from the eye chart? If the "1" level line of an eye chart is thick and uneven (above), it is caused by impedance mismatch. To solve the problem, we should guarantee the impedance matching from the beginning to the end. If the rising and falling edge of the eye chart is relatively thick (in the middle), it is caused by jitter.