Inline laser power measurement by photon momentum

Lehman John H.; Rogers Kyle; Rahn Daniel; Williams Paul

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Inline laser power measurement by photon momentum

机译：通过光子动量在线激光功率测量

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We present a novel measurement scheme and instrumentation for quantifying laser power by means of photon momentum. The optical design is optimized such that the incoming laser beam is minimally perturbed and is available for other purposes along the incoming beans axis. Additionally, the geometry of the instrument gives access to the small but measurable transmittance between two passive mirrors that face the force sensor. The force sensor is based on a commercially available weighing instrument ("scale") that has a temporal response of approximately 5 s and a readability of approximately 1 mu g (similar to 2W). Our measurement results demonstrate beam profile and power for 500 W, but the mirror and mass (or force) calibration are suitable for very high power up to 50 kW and beyond. The optics are based on commercially available, off-the-shelf mirrors optimized for the angle of incidence and maximum reflectance at the wavelength of 1070 nm. The size of the complete instrument has an input aperture of empty set75 mm, but this constraint is only a matter of optimizing the beam path and box geometry.

机译：我们通过光子动量提出了一种新的测量方案和用于量化激光功率的仪器。光学设计被优化，使得输入的激光束最小地扰动并且可用于沿着进入的豆轴的其他目的。另外，仪器的几何形状可访问面对力传感器的两个无源镜之间的小但可测量的透射率。力传感器基于市售的称重仪器（“刻度”），其具有大约5秒的时间响应和约1μg的可读性（类似于2W）。我们的测量结果展示了500W的光束轮廓和功率，但镜子和质量（或力）校准适用于高达50千瓦及更远的非常高的功率。光学元件基于市售的现成镜，针对1070nm波长的入射角和最大反射率优化。完整仪器的尺寸具有空SET75mm的输入光圈，但该约束只是优化光束路径和盒子几何形状的问题。

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来源
《Applied optics》 |2019年第5期|共3页
作者
Lehman John H.; Rogers Kyle; Rahn Daniel; Williams Paul;
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作者单位

Natl Inst Stand &

Technol 325 Broadway Boulder CO 80305 USA;

Natl Inst Stand &

Technol 325 Broadway Boulder CO 80305 USA;

Natl Inst Stand &

Technol 325 Broadway Boulder CO 80305 USA;

Natl Inst Stand &

Technol 325 Broadway Boulder CO 80305 USA;

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正文语种 eng
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Inline laser power measurement by photon momentum

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