【摘 要】
：
本文讨论了蓝-绿激光技术的现状和将来的可能性。着重于讨论对海洋光学可能最有用的激光器的发展状况。历来，氩离子激光器实质上被用于要求相干连续光源的所有水下实验中，而倍频Nd:YAG激光器则提供了脉冲式的蓝-绿辐射。这两种激光器都不适合高平均功率场合使用。对于高脉冲能量具有头等重要意义的应用来讲，目前最好的待选者是闪光灯泵浦的染料激光器。对于需要5~20亳微秒脉冲的测距选通应用，铜蒸汽激光器是最接近的选取者。适合这两种应用的单脉冲激光器还没有。具有适当效率的连续波激光器也没有。随着紫外/可见分子气体激光器的发
论文部分内容阅读
本文讨论了蓝-绿激光技术的现状和将来的可能性。着重于讨论对海洋光学可能最有用的激光器的发展状况。历来，氩离子激光器实质上被用于要求相干连续光源的所有水下实验中，而倍频Nd:YAG激光器则提供了脉冲式的蓝-绿辐射。这两种激光器都不适合高平均功率场合使用。对于高脉冲能量具有头等重要意义的应用来讲，目前最好的待选者是闪光灯泵浦的染料激光器。对于需要5~20亳微秒脉冲的测距选通应用，铜蒸汽激光器是最接近的选取者。适合这两种应用的单脉冲激光器还没有。具有适当效率的连续波激光器也没有。随着紫外/可见分子气体激光器的发展，可能满足多数海洋光学需要的单台蓝-绿光源将在3至5年内出现。有希望的器件，包括KrF激光和XeF激光泵浦的蓝-绿染料激光器以及XeF激光输出的喇曼降频变换。还找出了几种较长期可能实现的蓝-绿带内分子气体激光器。
其他文献
A new grouped precoding technique based on discrete cosine transform (DCT) is presented for peak to average power ratio (PAPR) reduction of optical intensity modulated/direct detection (IM/DD) orthogonal frequency division multiplexing (OFDM) system. The
All-dielectric metamaterials have emerged as a promising platform for low-loss and highly efficient terahertz devices. However, existing fabrication methods have difficulty in achieving a good balance between precision and cost. Here, inspired by the nano
This paper designs an energy-quality multilevel framework for the coding and transmission of aerial images, and then introduces a scaling-based intra encoder with flexible sampling factor (SF) and quantization parameter (QP). By experimentally investigati
A novel direct writing technique using submicron-diameter fibers is presented. This technique adopts contact mode in the process of writing, and submicron lines with different widths have been obtained. Experimental results demonstrate that the resolution
用染料激光对热管炉中Ba蒸气进行研究时,在4200～4340A波长范围内,发现一宽带结构及一系列Ba原子的非基态能级产生的跃迁线,用Ba_2准分子的解离对可能产生跃迁的动力学过程做了分析,此宽带结构被归结为Ba_2准分子峰.
美国西屋公司研制出的新型共轴激光泵，据说是迄今为止用于高能激光系统的最大、最有效、防冲击的高能激光源。
A novel and precise micron-scale nanosecond laser spot measurement based on film-scanning method is presented. The method can be used to measure the spot size, beam profile, and intensity distribution of the pulse. The central spot radius of the pulsed Be
The applications of white light-emitting diodes (LEDs) have become more and more wide recently, while the low light-extraction e±ciency of white LED limits its development. In this letter, a new structure of multilayer phosphor package of white LED is pro
空间激光通信中发射波面质量接近衍射极限, 测量波面是调整和检验发射系统的依据。传统的平板剪切干涉仪是测量波面的有效手段之一, 但应用在测量波面高度小于0.3个波长, 口径100～300 mm, 短相干长度的半导体激光器时存在一些限制。大口径横向双剪切激光干涉仪改进于马赫曾德尔结构, 可以实现这一功能。干涉仪主要由两块透射反射镜和四块反射镜组成, 其中一块反射镜结构上下分开, 形成一定的夹角, 通过干涉图上下条纹的差分求出波像差, 提高灵敏度。目前建成的仪器有效通光口径为290 mm, 等光程相干涉, 可适