双光子泵浦碱金属蓝光研究
发布时间：2018-09-01 14:05
【摘要】：由于蓝光在水中的吸收系数较低,因此蓝光激光器(400 nm~500 nm)在水下光通信方面有着重要的应用,蓝光激光器在海洋资源探测、高密度光存储、激光生物医学等领域具有广泛的应用前景。但是蓝光激光器的发展与红光激光器、绿光激光器相比较而言,有明显的落后,因此在其应用上也受到了很大的限制。目前,蓝光的产生方法包括固体激光器倍频、染料激光器、OPO和四波混频等。四波混频可以实现激光波长的转化,是一种无腔镜激光。近年来,在金属铷蒸汽中的原子能级52D5/2、62P3/2共振、近共振四波混频过程吸引了众多研究者的兴趣。本论文主要基于对铷原子的物理性质和铷原子能级结构的分析,在铷蒸汽中通过四波混频机理实现了778.1 nm→420.3 nm纳秒级脉冲激光束波长转化输出,在45cm长,170℃均匀加热的铷增益池中,转化能量效率可超过1%。文中对增益池温度、增益池长度、泵浦能量等因素对于四波混频转化效率影响进行了研究和分析。同时,通过对泵浦波长与出射波长关系的研究,初步解析了此四波混频转化过程的机理。
[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，
本文编号：2217432
[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，
本文编号：2217432
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