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Photonic crystal fiber optical parametric amplifier and supercontinuum sources Theoretical and experimental research

Author: WangQiuGuo
Tutor: YangBoJun
School: Beijing University of Posts and Telecommunications
Course: Electromagnetic Field and Microwave Technology
Keywords: Optical Fiber Communication Photonic crystal fiber (PCF) Supercontinuum (SC) Optical parametric amplifier (FOPA) Wavelength conversion
CLC: TN722
Type: PhD thesis
Year: 2009
Downloads: 354
Quote: 1
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Abstract


This paper is unfolded around the following items: the National Natural Science Fund Project \Research \Combined requirements of the subject and the main objective on photonic crystal fibers (PCFs) transmission characteristics of the study, based on a study of its application. Since photonic crystal fiber (PCF) has the chromatic dispersion and nonlinear characteristics of single mode fiber is no, it can maintain a single wide band characteristic, it is a zero-dispersion point can be changed between at 800nm ​​~ 1600nm, Its core can be relatively small and have a greater linear, γ value at 850nm up to 240W -1 . km -1 . It is made using the active devices in the optical communication, the WDM systems is especially promising, such as broadband dispersion compensation optical pulse compression, wavelength conversion, supercontinuum generation and optical amplifiers. In this paper, PCF fiber-optic communication systems applications: such as optical parametric amplifier technology, wavelength conversion technology and the application of super-continuum light source carried out theoretical and experimental research. Optical parametric amplifier is the erbium-doped fiber amplifier (EDFA), Raman amplifier (RA) and a semiconductor optical amplifier (SOA) appears after an optical amplifier, optical parametric amplifier with its high gain, wide bandwidth, etc., applied potential is very extensive development potential; wavelength conversion is all-optical networks and optical switching process is one of the key technologies, the use of this technology can achieve all-optical switches and other online operation; supercontinuum light source is based on broadband wavelength supercontinuum UWB can be arbitrarily extracted light, which provides a wide spectrum ultrashort pulses generated within a very economical techniques and methods to a new generation of multi-carrier light source by the industry's attention. The main work and innovation (boldface) as follows: 1. Use of dispersion-flattened photonic crystal fiber optical parametric amplifier constructed, completed a photonic crystal fiber parametric amplifier experiment observed a gain bandwidth of 28nm. Theoretical analysis of photonic crystal fiber optical parametric amplifier gain characteristics, relative Mintel and bandwidth characteristics, numerical simulation analysis of photonic crystal fiber nonlinear coefficient, dispersion, the pump power and fiber length parameters on parametric amplification gain and bandwidth affected. 2 Use the four-wave mixing in fiber wavelength conversion carried out experimental studies successfully conducted near the wavelength of 1550nm wavelength conversion, the actual measurement wavelength conversion bandwidth 3dB bandwidth of 28nm, the highest conversion efficiency of-26dB, but also to achieve All-optical frequency-shift-type optical switch operation. 3 Details of the photonic crystal fiber salient advantages: single-mode transmission characteristics, high nonlinearity, controllable dispersion and birefringence. Based on this, PCF discussed the application of the active device, while it was introduced in the edge areas of application. 4 Use the pulse width of 1.6ps pulses to 50MHz passively mode-locked fiber ring laser as the light source, the dispersion photonic crystal fiber for supercontinuum generation experiments, when the average pump power of 26mW, the elapsed after the photonic crystal fiber get 20dB bandwidth of 240nm supercontinuum. Meanwhile, the system analyzes the self-phase modulation, four-wave mixing and stimulated Raman scattering and other factors on photonic crystal fiber supercontinuum impact. 5 to dispersion-flattened nonlinear photonic crystal fiber media, the use of nonlinear optical effect, conducted a femtosecond pulse supercontinuum generation experiments. Lasers 120fs laser pulses, after a period of about one meter and ordinary single-mode fiber pigtail is broadened to 689fs, take advantage of this source, the center wavelength of 1550nm wavelength 480nm wide spectrum obtained 20dB supercontinuum. 6 In femtosecond pulses in dispersion-flattened photonic crystal fiber supercontinuum generation, based on the use of arrayed waveguide gratings supercontinuum be cut at the filter, at 1550nm wavelength near achieve wavelength femtosecond pulse output 32, which light source can be used for multi-channel WDM transmission system, can be used as a wavelength tunable multi-wavelength femtosecond pulsed lasers, a good value in use.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Amplification technology,the amplifier > Amplifier
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