And of course the high quality of laser pointer can be ensured

And of course the high quality of laser pointer can be ensured.
Each node has a wavelength of 32 in each direction. On a node on the network launch  receive (T  R) circuit pack failure, if the T  R fixed wavelength technology, each wavelength corresponds to a backup, if the market price of a T  R 10000 dollar terms, that just on the stock to an investment of up to $ 320,000, plus the cost of transportation and inventory space, this figure even higher. If the T  R with a wide range of tunable lasers, then, that the required backup T  R card number will be significantly reduced. In each node to configure a backup tunable lasers, the security will not be lower than the standard fixed-wavelength laser program. Actually, the parameter of this kind of laser pointer is strict and accurate and the performance is high and perfect.
If an adjustable T  R market price of $ 11,000, 10% higher than the fixed wavelength T  R, the total backup expenditure of only $ 44,000, compared to 86% of the expenditure savings in the above $ 320,000. In addition, tunable lasers are still many other potential advantages of concern, adjustable T  R program for each node annual maintenance cost of about $ 10,000, while the fixed wavelength of the maintenance costs of the program will reach $ 310,000. Tunable laser technology can be adapted to the needs of the future intelligent optical network, to meet emerging business requirements.
Thus, the fewer the number of channels, tunable lasers can also bring large cost savings. Of course, in real life, there are many other factors need to be considered. A spare parts center can service several nodes. However, the spare parts on each node, rather than individual located at a central site is a developing trend, thus reducing the number of site services, thereby saving money on fees. Tunable laser is adjustable to the most important devices in the device, the application of tunable lasers is becoming more widespread, the technology has become more sophisticated.  Laser range from infrared to ultraviolet and even X-ray region. The discovery greatly encouraged by the laser optical communications research, the scientists created a prospect of an unexpected and research areas, we can say there is no invention of the laser would not have today's optical communication or optical fiber communication. However, we suggest the customer should maintain the button well when using laser pointer or storing laser pointer.
The laser has just come to be known as the "problem-solving tool. Because its frequency is very simple, light emitted from the laser can be transmitted in the same direction in unison with a lens they are converging to the point, a high concentration of energy into the fiber, which is called coherence.