【作者】 郝怀庆；

【导师】 高兰兰；

【作者基本信息】 长春理工大学 ， 物理电子学， 2011， 硕士

【摘要】 LD泵浦全固态激光器是激光技术领域的一个重要分支,因此研制与其配套的激光功率检测设备也是一个不可或缺的内容。本文从功率计的工作原理出发设计了一种以硅光电池为探测元件的结构简单、成本低但非常实用的智能化三波长激光功率计,可以实现对绿光532nm,蓝光473nm和红光671nm三种不同波长激光的精确检测。论文首先介绍了热电和光电两种类型探测器的基本工作原理,对比和分析其优缺点。指出热电探测器虽然响应频率宽,但是响应时间长,而且价格昂贵；以硅光电池为基础的光电型探测器,精确度高,响应时间短,制作成本低廉。因此本文设计的三波长功率计采用了光电探测器。其次,在滤光片问题上,我们选择了在532nm、473nm和671nm都具有一定透过率的型号为DTB545带通滤光片作为三波长功率计的滤光元件,一方面消除了杂散光,另一方面也保证了三个波长激光的有效透过。最后,在波长切换控制方面设计了两种方案,一种是手动控制波长切换,另一种是自动控制波长切换。并对手动控制方案进行了实验检测。检测结果与用标准单波长功率计的测量结果基本一致。更多还原

【Abstract】 LD pumped solid-state laser is an important branch of laser technology, so researching on the matching power detectors are necessary. This meter is simple in configuration, low cost and practical, which can realize the precise measurement for three different wavelengths such as 532nm,473nm and 671nm.Firstly the basic working principles of thermoelectric and photoelectric detectors are introduced, and the advantages and disadvantage are compared and analyzed. It points out that although thermoelectric detector response wider frequency width but the response time is long and the cost is expensive. Photoelectrical detector of silicon photocell is of high precision and the response time is short and the price is low. Therefore the three wavelengths power meter designed in this paper adopts photoelectric detector.In addition, we select model of DTB545 band-pass filters which have certain transmittances at 671nm,532nm,473nm wave as filtering element, which not only eliminate stray light but also ensure effective transmission of three wavelengths.In the end, two schemes are design in wavelength switching control. The one is a hand control wavelength switch, the other is automation control wavelength switch. Moreover, we carry out experiment detection for the second scheme, whose result is consistent with the measuring results which are detected by the standard single wavelength power meters.更多还原