2. With the rapid development of modern times, the photoelectric industry has gradually spread, and developed obviously in the fields of optical communication, laser, photoelectric display, optics, solar photovoltaic, electronic engineering, logistics network and so on, and gradually integrated into a broader space.
Extended data
Communication application of photoelectric technology
1. Optical communication is based on light waves. There are two ways to increase the optical bandwidth:
① improve the single channel transmission rate of optical fiber;
② Increase the number of wavelengths transmitted in a single optical fiber, that is, wavelength division multiplexing (WDM).
In fact, optical communication equipment is only suitable for the last few kilometers.
2. For optical communication, the technology is basically mature, but the business requirements are relatively insufficient. Take FTTH as an example, which is called "the ultimate goal of broadband access". Its implementation technology EPON is fully mature, but due to the low bandwidth required by ordinary users, the commercialization of FTTH is limited to some pilot areas.
3. However, in 2006, with the development of triple play services such as IPTV, the bandwidth provided by operators can no longer meet the requirements of users for HDTV, and the deployment of FTTH has also been put on the agenda. Coincidentally, ASON has flexible control over the transmission network and can provide personalized services for corporate customers. Many operators have invested heavily in building ASON to develop and maintain corporate customers.
References:
Baidu encyclopedia: photoelectricity