Exploration Of Optical Energy Storage And NIR Wavelength Conversion In Rare Earth Doped Relaxation Ceramics

With the explosive development of information and energy technology, in the fieldof optical communication and laser detection, more and more application of newmaterials promote the technology progress and achieve the successful commercialapplication. Good performance of the multifunctional light detection andcommunication devices can meet the demand of modern people. In a variety ofmaterials applications, lead lanthanum zirconate titanate ((Pb, La)(Zr, Ti) O3), referredas PLZT, which application is very extensive. With the production process of rare earthelement doped transparent ceramic improvement, such material have many excellentperformance, for example, price is low, sintering bulk is large volume easy tomanufacture and it has high doping concentration, good stability. At the same time suchmaterial, which get more and more research emphasis, have excellent ferroelectric,piezoelectric, pyroelectric and excellent electro-optic effect. All the electro-opticalproperties of ceramic materials in solid laser field gradually displace single crystalmaterials and the study based on electro-optic ceramic for multifunction amplifier gainmedium mentioned again. This dissertation studied basic properties of rare earth dopedPLZT ceramics and optical amplifier and wavelength conversion based on energystorage.First of all, the spectral properties of Nd:PLZT is studied. Using spectrophotometermeasured Nd:PLZT absorption spectrum, we got Nd:PLZT ceramics characteristicabsorption peak and absorbing boundary. With the center wavelength of804nmsemiconductor diode laser excitation, measured the emission spectrum of Nd:PLZTceramics. From measurement of Nd:PLZT absorption spectrum and fluorescencespectrum was analyzed by using the J-O theory. Transparent ceramic internal spectralparameters of the Nd:PLZT as light amplification has the theoretical basis.Secondly, according to the results of theoretical analysis, experiment is designed. Itwas observed at room temperature Nd:PLZT light amplification phenomenon, and alsoobserved the tailing time and reascend curve. Systematic studied the influence factors ofaffect the optical gain, we got the conclusion that the pump, induction light, purple light all have certain influence on optical gain. Using capture electron traps model of PLZT,the tailing time, the theoretical explanation of reascend curve and optical gainphenomenon is given.Finally, in the near infrared area, we studied the wavelength conversion based onenergy storage in Nd:PLZT. We found that by violet light irradiation in advance samplesreally able to store energy with photochromic effect. Under the stimulus of inductionlight, it can produce1064nm and1344nm wavelength conversion, which will guidethe research of future MIR-FIR wavelength conversion in materials.