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Research On Several Characteristics And Applications Of Highly Nonlinear Fiber And Silicon On Insulator Waveguide

Posted on:2013-01-10Degree:DoctorType:Dissertation
Country:ChinaCandidate:X W ShenFull Text:PDF
GTID:1228330374499574Subject:Optical Engineering
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With the development of the optical communication technology, the optical device has become an important support for modern information society. Moreover, the continuous progressing of optical device injects new vitality into the development of information technology. Developing a new generation of optical device by new structures and mechanism has become an inevitable trend of modern information technology. So research on nonlinear effects and application of optical devices are very important to the development of future optical communication technology.In this dissertation, dispersion, nonlinear characteristics, application of highly nonlinear photonic crystal fiber (PCF), normal highly nonlinear fiber and silicon on insulator waveguide are experimentally and theoretically anlayzed. The main contents and the achievements are listed below:(1) The highly efficient anti-Stokes signals (ASS) conversions have been experimentally achieved. In the experiment, with highly nonlinear PCF, the maximum power ration of ASS to the residual pump and the Stokes signal are above33:1and25:1around560nm, respectively. The maximum conversion efficiency was up to34%in experiment. These results can promote the generation and develoption of new style devices in ultrafast photonics.(2) The broadband ultra-violet and mid-infrared continua have been experimentally achieved. In the experiment, with highly nonlinear PCF, the shortest wavelength of the ultra-violet continuum is below246nm, the longest wavelength of the mid-infrared continua exceeds2500 nm, and their3dB bandwidth are bigger than140nm and200nm, respectively. Mid-infrared continuum exceeds2500nm. The result can provide a candidate for ultra-violet and mid-infrared sources needed by the optical detection and optical information processing.(3) The highly efficient Cherenkov radiations (CRs) at visible wavelength have been experimentally achieved. In the experiment, with120fs pump pulse, using the hollow-core photonic crystal Fiber (HC-PCF), the maximum output power ratio of the CRs at539nm to the residual pump is calculated as24:1, the bandwidth and the conversion efficiency can up to62nm and32%. These results provide an effective approach to obtaining the signal source at short wavelength.(4) The experiment for improving Stimulated Brillouin Scattering Threshold (SBST) has been carried out. In this experiment, The SBST of experiment fibers, in the detection range (limited by EDFA), are effectively improved18dB. The influences of pump wavelength width, the length and type of fibers on SBST are investigated. Moreover, Brillouin gain spectrum (BGS) and Brillouin frequency shift (BFS) of several fibers are measured by self-heterodyne detection. These results provide the preconditions for high power continuous pump transmission in fibers.(5) The phase insensitive fiber optical parametric amplifier (PI-FOPA) theoretically and experimentally investigated. When the pump power is28dBm,41dB on-off gain and105nm bandwidth (>28dB), in detection range (limited by the range of TSL), are achieved by300m highly nonlinear fiber. Moreover, the influences of pump power, pump wavelength and the power of signal on the on-off gain of small signal in PI-FOPA are analyzed. Those results provide some basis for further researches on high gain, large bandwidth PI-FOPA.(6) The non-degeneration cascade-type phase sensitive fiber optical parametric amplifier (PS-FOPA) experimentally built. When the pump power is30dBm,41dB on-off gain is achieved. The influences of fiber length of different cascade of the cascade-type PS-FOPA, the pump power and wavelength on the on-off gain of PS-FOPA are investigated. These fruits instructive to further using the cascade-type to achieve signal amplification, shaping and regeneration.(7)8dB maximum gain and354nm3dB bandwidth in the dual-pump silicon on insulator waveguide OPA are achieved by simulation. The influence of structures parameters on the dispersion and nonlinear coefficient of ridge silicon on insulator waveguide are analyzed. Furthermore, the influences of structures parameters, pump power, pump pulse repetition rate and free carrier lifetime on noise figure and net gain of dual-pump optical parametric amplifier are numerical simulated. This fruits provide some useful suggestion for further analysis to the dispersion and nonlinear characteristics of silicon on insulator waveguide and the realization of OPA.
Keywords/Search Tags:optical parametric amplifier (OPA), stimulated brillouinscattering (SBS), four wave mixing (FWM), photonic crystal fiber (PCF), hollow-core photonic crystal fiber (HC-PCF), cherenkov radiations(CRs), anti-stokes signal (ASS)
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