【摘要】：由于藍光在水中的吸收系數(shù)較低,因此藍光激光器(400 nm~500 nm)在水下光通信方面有著重要的應(yīng)用,藍光激光器在海洋資源探測、高密度光存儲、激光生物醫(yī)學(xué)等領(lǐng)域具有廣泛的應(yīng)用前景。但是藍光激光器的發(fā)展與紅光激光器、綠光激光器相比較而言,有明顯的落后,因此在其應(yīng)用上也受到了很大的限制。目前,藍光的產(chǎn)生方法包括固體激光器倍頻、染料激光器、OPO和四波混頻等。四波混頻可以實現(xiàn)激光波長的轉(zhuǎn)化,是一種無腔鏡激光。近年來,在金屬銣蒸汽中的原子能級52D5/2、62P3/2共振、近共振四波混頻過程吸引了眾多研究者的興趣。本論文主要基于對銣原子的物理性質(zhì)和銣原子能級結(jié)構(gòu)的分析,在銣蒸汽中通過四波混頻機理實現(xiàn)了778.1 nm→420.3 nm納秒級脈沖激光束波長轉(zhuǎn)化輸出,在45cm長,170℃均勻加熱的銣增益池中,轉(zhuǎn)化能量效率可超過1%。文中對增益池溫度、增益池長度、泵浦能量等因素對于四波混頻轉(zhuǎn)化效率影響進行了研究和分析。同時,通過對泵浦波長與出射波長關(guān)系的研究,初步解析了此四波混頻轉(zhuǎn)化過程的機理。
[Abstract]:Because of the low absorption coefficient of blue light in water, blue laser (400 nm~500 nm) has an important application in underwater optical communication. Blue light laser is used in ocean resource detection and high density optical storage. Laser biomedicine and other fields have a wide range of applications. However, the development of blue laser is obviously backward compared with red laser and green laser, so it is limited in its application. At present, blue light generation methods include solid-state laser frequency doubling, dye laser OPO and four-wave mixing. Four-wave mixing can realize the conversion of laser wavelength and is a non-mirror laser. In recent years, the atomic level of 52D 5 / 2 / 62 P / 3 / 2 resonance and near-resonance four-wave mixing process in rubidium vapor have attracted many researchers' interest. Based on the analysis of the physical properties of rubidium atom and the structure of rubidium atomic energy, the wavelength conversion output of 778.1 nm ~ 420.3 nm nanosecond pulse laser beam is realized by four-wave mixing mechanism in rubidium vapor. The conversion energy efficiency can exceed 1 in the rubidium gain cell which is uniformly heated at 170 鈩，

本文編號：2217432