Although the application of transmission interface optical cables is still limited at present, and the average consumer's reception level needs to be improved, the adoption of optical cables has become the focus of recent development of high-speed transmission interface manufacturers. After mass production of high-definition multimedia interface (HDMI) cables, Intel took advantage of the launch of Thunderbolt Active Optical Cable (AOC) at the American Media Show (NAB) to implement the Thunderbolt fiber cable program. Weifeng Electronics and optical fiber manufacturers are also expected this year. Computex exhibited the third-generation Universal Serial Bus (USB 3.0) using fiber optic cable. Analysis of the reasons for the transmission of interface cables towards optical fibers extends the incentives for the largest transmission distances of existing copper cables. However, the fiber must not be bent too much and the inherent cost is too high, making the transmission interface for the introduction of optical cables less applicable. In short, inflexibility and power supply are two major challenges for fiber optic cable.
Optical fiber breaks existing transmission distance limitations
Since the transmission rates of various types of transmission interfaces have reached Gbit/s or more, the problem of signal attenuation due to cable transmission distance is more serious than before, and both are less than 10 meters. Therefore, using optical fibers will effectively solve the problem of transmission distance. Huang Zhongcheng, product marketing manager of Intel's Asia Pacific technical marketing service group, said that at this stage, there are vendors planning to use Thunderbolt to create a seamless digital home theater image transmission, but the use of copper Thunderbolt transmission distance of only 2 meters, will become the actual operation bottleneck.
In fact, not only does Thunderbolt want to tap into new application markets with longer cables, but USB3.0, HDMI and other transmission interfaces have the same intention. In addition to the HDMI fiber optic cables introduced by enterprises such as Huanlong, Yuanjie Technology, Hitachi, Avago, and Opticis, the USB3.0 fiber cable will soon be available under the efforts of Weifeng Electronics, Yuanjie Technology and Opticis. .
Guo Dawei, director of marketing at US-based Silicon Image, pointed out that the signal attenuation and electromagnetic interference (EMI) derived from ultra-high transmission rates have caused copper cables to no longer increase the transmission distance of their cables. For example, the HDMI copper cable is 7 meters away. To the limit, but some applications, such as home theaters, large-scale viewing halls, etc., have a wide area, so HDMI developers have already imported fiber optic cables, extending the transmission distance from 10-15 meters, and even some manufacturers have introduced 150 meters of HDMI cable.
As for DisplayPort, there is no launch plan for fiber optic cable. Zhu Zhenmeng, product marketing manager of STMicroelectronics's Consumer Products Division in Greater China and South Asia, said that the existing DisplayPort version 1.2 transmission distance and speed has met the current demand for 99.9% of the image transmission market, so the video electronics standard The specification of VESA's use of optical cables for DisplayPort is not yet clear.
Fibre Channelization of Transmission Interface Creates New Business Opportunities
The fiber optic transmission of high-speed transmission interface cables not only benefits the development of optical fiber companies, but also brings new business opportunities for semiconductor manufacturers. Lin Shiyuan, marketing manager of high-performance analog products in the Asian market of Texas Instruments (TI), said that the use of optical cables must convert the electronic signals in the transmission interface to optical signals, and then convert them into electronic signals when they arrive at the destination.
The telecom companies that currently convert the backbone network into optical fibers have begun to demand optical signal converters. It is expected that the demand for components such as converters and Re-drivers will rise after the rapid development of high-speed transmission interface optical cables. Texas Instruments The products currently used in telecommunications networks at this stage can be used in the application fields of high-speed transmission interfaces for personal computers.
Inflexibility and Power Supply into Fiber Optic Cables
In response to the proliferation of transmission interfaces toward fiber optics, Lin Mingxian, director of business development at TranSwitch, believes that Thunderbolt has a high transmission rate of 10 Gbit/s. It is expected that the technology-locked market will not only have real-time image transmission, so the development of optical fiber cable is necessary. However, it should be noted that the optical fiber should not be excessively bent, so as not to affect the signal transmission and the problem that it cannot supply power.
Lin Mingxian further emphasized that the biggest drawback of optical fiber is that it will break when it is slightly bent, and it will not be able to transmit signals. If a corner is encountered during deployment, it is rather troublesome. At present, only the manufacturer with the research and development capability of flexible optical fiber material is only Coring.
On the other hand, the high cost of optical fiber enables the high-speed transmission interface of the optical cable to only lock the high-end market. Huang Zhongcheng believes that at present, the average user does have a low demand for long-distance transmission interface cables, so the market of Thunderbolt optical cables is not fully implemented. Guo Dazhao also admitted that due to the high cost of optical fiber, there are still fewer HDMI cable adopters.
Optical fiber breaks existing transmission distance limitations
Since the transmission rates of various types of transmission interfaces have reached Gbit/s or more, the problem of signal attenuation due to cable transmission distance is more serious than before, and both are less than 10 meters. Therefore, using optical fibers will effectively solve the problem of transmission distance. Huang Zhongcheng, product marketing manager of Intel's Asia Pacific technical marketing service group, said that at this stage, there are vendors planning to use Thunderbolt to create a seamless digital home theater image transmission, but the use of copper Thunderbolt transmission distance of only 2 meters, will become the actual operation bottleneck.
In fact, not only does Thunderbolt want to tap into new application markets with longer cables, but USB3.0, HDMI and other transmission interfaces have the same intention. In addition to the HDMI fiber optic cables introduced by enterprises such as Huanlong, Yuanjie Technology, Hitachi, Avago, and Opticis, the USB3.0 fiber cable will soon be available under the efforts of Weifeng Electronics, Yuanjie Technology and Opticis. .
Guo Dawei, director of marketing at US-based Silicon Image, pointed out that the signal attenuation and electromagnetic interference (EMI) derived from ultra-high transmission rates have caused copper cables to no longer increase the transmission distance of their cables. For example, the HDMI copper cable is 7 meters away. To the limit, but some applications, such as home theaters, large-scale viewing halls, etc., have a wide area, so HDMI developers have already imported fiber optic cables, extending the transmission distance from 10-15 meters, and even some manufacturers have introduced 150 meters of HDMI cable.
As for DisplayPort, there is no launch plan for fiber optic cable. Zhu Zhenmeng, product marketing manager of STMicroelectronics's Consumer Products Division in Greater China and South Asia, said that the existing DisplayPort version 1.2 transmission distance and speed has met the current demand for 99.9% of the image transmission market, so the video electronics standard The specification of VESA's use of optical cables for DisplayPort is not yet clear.
Fibre Channelization of Transmission Interface Creates New Business Opportunities
The fiber optic transmission of high-speed transmission interface cables not only benefits the development of optical fiber companies, but also brings new business opportunities for semiconductor manufacturers. Lin Shiyuan, marketing manager of high-performance analog products in the Asian market of Texas Instruments (TI), said that the use of optical cables must convert the electronic signals in the transmission interface to optical signals, and then convert them into electronic signals when they arrive at the destination.
The telecom companies that currently convert the backbone network into optical fibers have begun to demand optical signal converters. It is expected that the demand for components such as converters and Re-drivers will rise after the rapid development of high-speed transmission interface optical cables. Texas Instruments The products currently used in telecommunications networks at this stage can be used in the application fields of high-speed transmission interfaces for personal computers.
Inflexibility and Power Supply into Fiber Optic Cables
In response to the proliferation of transmission interfaces toward fiber optics, Lin Mingxian, director of business development at TranSwitch, believes that Thunderbolt has a high transmission rate of 10 Gbit/s. It is expected that the technology-locked market will not only have real-time image transmission, so the development of optical fiber cable is necessary. However, it should be noted that the optical fiber should not be excessively bent, so as not to affect the signal transmission and the problem that it cannot supply power.
Lin Mingxian further emphasized that the biggest drawback of optical fiber is that it will break when it is slightly bent, and it will not be able to transmit signals. If a corner is encountered during deployment, it is rather troublesome. At present, only the manufacturer with the research and development capability of flexible optical fiber material is only Coring.
On the other hand, the high cost of optical fiber enables the high-speed transmission interface of the optical cable to only lock the high-end market. Huang Zhongcheng believes that at present, the average user does have a low demand for long-distance transmission interface cables, so the market of Thunderbolt optical cables is not fully implemented. Guo Dazhao also admitted that due to the high cost of optical fiber, there are still fewer HDMI cable adopters.
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