Fiber amplifiers and photoelectric switches are very different in applications, and play different roles.
Fiber amplifier does not need complicated process of photoelectric conversion, photoelectric conversion and signal regeneration, can be directly on the signal of the optical amplifier, has good transparency, especially suitable for long-distance optical communication relay amplification. In optical fiber access network, it is necessary to use optical fiber amplifier to improve the power of optical signal to compensate the light loss caused by optical distributor and to increase the number of users and reduce the construction cost of the subscriber network.

      The photoelectric switch converts the input current on the transmitter to the light signal, and the receiver detects the target according to the intensity of the received light or whether it has or not. The photoelectric switch has been used for crop position detection, liquid level control, product count, width discrimination, speed detection, cut to length, hole recognition, signal delay, automatic door sensor, color detection, punching and shearing machine and safety protection etc.. In addition, the use of infrared stealth, but also in the banks, warehouses, shops, offices and other occasions as anti-theft warning.

     Puyang Industrial Technology Research Institute, a total area of 3500 square meters of existing laboratory. There are mechanical design and processing laboratory, semiconductor packaging and testing laboratory, electronic circuit design and debugging laboratory, fiber grating production laboratory, system testing laboratory. Key project laboratories are equipped with international advanced testing equipment, including fiber grating fabrication laboratory, laboratory test system with standard purification, anti-static dust chamber, the performance of the leading domestic and all test system for high-end testing equipment such as the US and Japan, can collect data for a variety of test detection, experimental design the test and certification service. The main equipment: deep ultraviolet harmonic water-cooled argon ion laser, arbitrary waveform generator, 33G bandwidth, 100GS/a sampling rate of digital oscilloscope, signal analyzer, 16bit sampling oscilloscope, network analyzer, spectrum analyzer, polarization maintaining optical fiber fusion splicer, tunable laser, signal generator, fiber optic spectrometer.