Design of U-Band Fiber Amplifying Spontaneous Emission Spectra and Optimization of Output Spectral Peak Power

Abstract

Optical communication is an important way of information transmission. At present, most of the optical fiber amplifiers on the market can only work in the wavelength range of 1530-1610m. The higher band, U-band is less used. Therefore, optical fiber amplifiers can extend the communication frequency range, provide more bandwidth, and meet the demand for higher rates and greater bandwidth optical communication with the continuous growth of network traffic. The paper is about the design of U-band (1650-1700m) fiber amplifying spontaneous emission spectrum and the optimization of output spectral peak power, and to find out the possibility of realizing efficient U-band fiber amplifiers. By establishing rate equation and power propagation equation, we simulate and calculate the variation of amplifying spontaneous emission spectrum with fiber length and doping concentration, and use genetic algorithm to optimize fiber length and doping concentration, so as to maximize the peak power of output spectrum. The experimental results show that the bismuth-doped high germanium silicate fiber can achieve effective amplification in the U-band range, and higher output spectral peak power can be obtained through optimization.