Fiber Raman amplifier gain flattening Research and Application
|School||China Institute of Metrology|
|Course||Measuring Technology and Instrument|
|Keywords||Fiber Raman Amplifier Gain flattening Multi-wavelength pumping Single-wavelength pumping Chirp fiber Bragg grating gain flattening filter Stimulated Brillouin Scattering|
With fiber-optic communication technology and the rapid development of multimedia technology, network television, video telephony, tele-education, telemedicine, electronic library and electronic office systems and some in the past seemed a distant dream and technologies are gradually come into our lives and, in the process of development, fiber Raman amplifier (FRA) will make its unique advantages in the future long-distance backbone network and metropolitan area networks play an important role. However, the practical application of Raman amplifiers strongly depends on two important factors: the high-power pump sources and sufficiently flat gain spectrum. With the high power laser production technology matures, a flat gain spectrum characteristic Raman amplifier design has become a top priority. This article will focus on how to achieve fiber Raman amplifier gain flattening and fiber Raman amplifiers in the actual communication system in rats. This paper will first briefly describe the entire optical fiber communication technology, optical fiber Raman amplifiers and current research and development process of fiber Raman amplifier gain flattening significance of the study. Second, focus on optical Raman amplifier gain flattening research theory, simulation and related experimental studies, the specific contents include: First: This article will use the single-step and multi-step algorithm to extract the average power multi-channel multi-pumped fiber pull Man of the amplifier transfer equation, and its flat gain spectrum optimization, this work is mainly targeted at our laboratory has three wavelength fiber Raman laser (wavelengths 1428nm, 1445nm, 1466nm) for power optimization, it can get high flat, broadband wide gain spectra verified by experiments. Second: For single-pump option, we were using a wavelength of 1427nm and 1455nm fiber Raman laser as the S-band and C-band fiber Raman amplifier pump source, since the Raman gain spectrum is not flat characteristics, this article will For the actual measured gain spectrum and benchmarks set by the size and bandwidth of the amplifier gain to give the corresponding inverted spectrum (the inverted spectrum ideal gain flattening filter on goal loss spectrum), the theoretical study how accurate design and inverted spectrum consistent gain flattening filters, filter types studied include chirped Bragg grating (CFBG) gain flattening filter and a long period fiber grating (LPFG) gain flattening filter, the actual experimental application, will use chirped fiber Bragg grating filter As a single-pumped fiber Raman amplifier gain flattening filter. Third: High pump case study nonlinear phenomena (mainly discussed here stimulated Brillouin scattering), and study its effect on fiber Raman amplifier gain flattening design implications and solutions. Finally, to further validate our developed distributed fiber Raman amplifiers in the actual operation of the communication system in which the actual performance, we were in the campus network and RoF communication system (CDMA base stations and repeaters here refers to the communication link between ) on the application of fiber Raman amplifiers experimental study.