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Nanonew ton thrust measurement of photon pressure propulsion using semiconductor laser

机译：半导体激光器用于光子压力推进的纳米牛顿推力测量

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To evaluate the thrust produced by photon pressure emitted from a 100 W class continuous-wave semiconductor laser, a torsion-balance precise thrust stand is designed and tested. Photon emission propulsion using semiconductor light sources attract interests as a possible candidate for deep-space propellant-less propulsion and attitude control system. However, the thrust produced by photon emission as large as several ten nanonewtons requires precise thrust stand. A resonant method is adopted to enhance the sensitivity of the biflier torsional-spring thrust stand. The torsional spring constant and the resonant of the stand is 1.245 × 10~(-3) Nm/rad and 0.118 Hz, respectively. The experimental results showed good agreement with the theoretical estimation. The thrust efficiency for photon propulsion was also defined. A maximum thrust of 499 nN was produced by the laser with 208 W input power (75 W of optical output) corresponding to a thrust efficiency of 36.7%. The minimum detectable thrust of the stand was estimated to be 2.62 nN under oscillation at a frequency close to resonance.
机译：为了评估由100 W级连续波半导体激光器发出的光子压力产生的推力，设计并测试了扭力平衡精确推力支架。使用半导体光源的光子发射推进吸引了人们的兴趣，因为它们可能成为无深空推进剂推进和姿态控制系统的候选者。但是，由几十个纳牛顿的光子发射产生的推力需要精确的推力架。采用共振方法来增强双弹簧扭转弹簧推力支架的灵敏度。支架的扭转弹簧常数和共振分别为1.245×10〜（-3）Nm / rad和0.118 Hz。实验结果与理论估计吻合良好。还定义了光子推进的推力效率。输入功率为208 W（光输出为75 W）的激光器产生的最大推力为499 nN，对应推力效率为36.7％。在接近共振频率的振动下，机架的最小可检测推力估计为2.62 nN。

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