Optical transceiver market status and development trend

Optical transceiver market status Video optical transceivers have entered the Chinese market for more than 20 years. The earliest application of video optical transceivers was mainly concentrated in the public security, military, government and other capital conditions are better, there is an urgent need for video services, and require higher transmission efficiency of the industry. Most of the earliest fiber-optic lines were multi-mode, and the transmission distance was generally only 2 Km. The transmission effect was poor and was easily affected by interference. With the popularization of single-mode optical fiber and optical transceiver technologies, the transmission distance can easily reach 30-40 Km. The current video optical transceiver equipment has basically achieved single-mode transmission, and multi-mode optical devices have basically stopped production. In order to adapt to the multi-mode optical cables laid in the early years, some optical transceivers are equipped with single and multi-mode self-adaptive circuits to facilitate the transmission in multi-mode optical cables.

The emergence of Coarse Wavelength Division Multiplexing (CWDM) technology has led to great development and progress in analog optical transceivers in terms of transmission capacity, transmission mode, etc., which can simultaneously transmit 1470nm and 1490nm in a conventional single-core fiber (such as G.652). , 1510nm, 1530nm, 1550nm, 1570nm, 1590nm, 1610nm and other eight different wavelengths, each of which can be time-division-multiplexed 1- to 10-channel video signals, that is, from the single-core fiber transmission one or two optical bands extended to seven, Eight light bands. A fiber can transmit more audio, video, and data signals. However, due to the limitations of analog technology, the more channels the single fiber transmits, the more difficult it is to debug, and the greater the possibility of interference between channels, the development of analog optical transceivers has encountered a major bottleneck. With the development of broadband digital optical transmission device technology and digital video technology, digital optical transceivers began to enter China in 2001. The digital processing method completely solves the problem of analog optical transceiver channel interference. The digital optical transceiver signal-to-noise ratio can reach 67 dB, far beyond the analog 50 dB, and the signal transmission quality is very high. The digital optical transceiver can transmit 128 channels of uncompressed video in a single fiber. At the same time, it can add signals such as Ethernet and telephone voice, which greatly enriches the types of signals transmitted by the optical transceiver. The increase in transmission capacity improves the utilization of optical fiber bandwidth, reduces the cost of the transmission system, and improves the price/performance ratio. After several years of development, the digital optical terminal gradually replaced the analog optical transceiver. By 2007, it had occupied most of the optical transceiver market.

With the rapid development of urban transportation and highway construction in our country, the requirements for equipment in the monitoring system are getting higher and higher. Because the optical fiber transmission has the advantages of wide bandwidth, long transmission distance and anti-interference, it is widely used. Due to its many transmission advantages and the drastic increase in market demand in recent years, optical transceivers have significantly reduced the cost of optical cables and have entered a relatively benign industrial development track. . In the “Safe City” construction that began around 2006, Optronics has almost become the standard configuration, allowing optical manufacturers to usher in a “Golden Age”. At present, safe cities, urban intelligent transportation, highways, and urban rail transit projects are the major markets for optical transceivers.

At present, the price of optical transceivers varies greatly due to the differences in application areas, product quality, brands, and services. In industrial video surveillance areas such as highways, petroleum, petrochemical, etc., due to the high requirements on product quality, brand, and service, there are not many manufacturers that can enter, so the price is relatively high; while other security monitoring applications are more expensive. sensitive. Take 1V1D optical transceiver products as an example, the price may reach more than 1,000 yuan in the highway field, and the security application field may be as low as 500 yuan, and even 200 yuan can be found on the Internet.

Before and after 2005, the optical transceiver market demand began to increase rapidly. With the rapid development of optical transceiver technology and the increasing popularity of applications, the production and sales threshold for video optical transceivers is getting lower and lower. A large number of small workshop companies have started to sell generic products in the market. Most of these products are manufactured in a shoddy manner, with poor quality and extremely low service life, which disrupts the normal production and sales order of domestic optical transceivers. Unregulated market operations and vicious price competition have affected the healthy development of the industry. On the other hand, with the participation of small and medium-sized optical transceiver manufacturers, the market share of domestic optical transceiver companies has been rising. Foreign brands have begun to shrink in the domestic market, and domestic optical transceivers have begun to export in large quantities to Beijing, Guangdong (mainly in Shenzhen and Guangzhou). The provinces of Hubei, Zhejiang, and Shanghai are the major production bases of domestic video optical transceivers. Currently, the ratio of cameras and optical transceivers is approximately 200:1, and the market size of optical transceivers and related communications products is approximately 1.6 billion yuan.

At present, there are mainly three types of video optical transceiver manufacturers in China. The first category is communication companies that rely on strong optical communication technologies. These enterprises have a good technical foundation. Most of the enterprises are medium-sized (the annual sales volume is about 50 million). This category also includes the communication of video optical transceivers. Manufacturers, they are the core business of this sub-sector. The second category is some of the large-scale integrated video surveillance manufacturers in the security industry. Video optical transceivers are only a part of their product chain. These enterprises have large-scale, comprehensive technical strength, and the proportion of video optical transceivers in their output value. Different. The third category is processing enterprises with the largest number. Due to the low technical threshold of the optical transceiver industry, one or two design and development personnel who have left the optical communications company can set up a company to assemble and manufacture video optical transceivers in a small workshop. The video optical transceiver is its main product, and counterfeit products in such enterprises. Prevail.

Judging from the current industry structure, Optical transceivers have just entered the mature stage. With the continuous expansion of the security industry, the optical transceiver market will continue to maintain stable growth in the next few years.

The development trend of the optical transceiver market With the continuous maturity and improvement of the technology, the domestic optical transceivers are constantly improving in terms of functions and performance. Such as the video AGC (automatic gain control, which automatically monitors the amplitude of the input video signal, dynamically adjusts the gain so that the receiver outputs a standard 1Vp-p video signal) function. The technology upgrade is also reflected in the diversity of functions. For example, it can provide richer service interfaces, battery power-off alarms, character superposition, lightning protection and moisture protection, and equipment network management. It shows that the product is easy to use and has advanced fault pre-diagnosis. The system's video transmitter. The video optical transceiver technology upgrade is also reflected in the functional modular design. The main functions of the product, such as photoelectric conversion, video, data, audio and other functional modules are designed to be completely independent pluggable, and the signals involved in security are integrated into one. Optical transceivers.

Lightning protection design is also an important issue for the modern optical transceivers. Lightning protection needs to be considered on all external interfaces of the optical transceiver, not just the data interface, and all external interfaces such as video and audio and power input interfaces should also be considered. Otherwise, lightning strikes the device from the weakest link in many cases. Causes equipment damage.