Study of simultaneous multiple target shot technique for space debris mitigation

空间碎片缓减同时多目标射击技术研究

• 批准号: 11450380
• 负责人: UCHIDA Shigeaki
• 金额: $ 6.78万
• 依托单位: Institute for Laser Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450380/
• 关键词: space debris; optical phase conjugation; momentum coupling coefficient; laser ablation; Brilluoin enhanced four wave mixing; high power laser; Acquisition, tracking, targeting; optical wave front control; スペースデブリ; 位相共役光; レーザー; ブリルアン散乱; 四光波混合 /

A scheme of space debris mitigation using high-power space-born laser has been proposed. The scheme targets so called small debris that has not been treated before. The scheme uses optical phase conjugation for target acquisition, tracking and targeting with a single optical system. Basic characteristics of Brillouin enhanced four wave mixing as a phase conjugation technique was studied.An initial impact has been calculated to push space debris into the upper atmospheric layer when instantaneous impact is exerted. Required laser energy was also calculated using momentum coupling coefficient, an efficiency of laser energy conversion to momentum of laser ablation. Thus laser pulse energies were estimated necessary to cause large enough orbital deflection to debris. Distance, time of trespassing and energy of deflection were also calculated so that average power that the laser system has to generate can be designed.Wave front control of laser beam then investigated to study the feasibility of the use of phase conjugation for debris acquisition, tracking and targeting. A degree of compensation of wave front distortion caused by various aberrations. The source of aberrations tested include lens, cylindrical lens, random phase plate. For all the aberrations, about 90 % fidelity has been confirmed.Carbon Fluorinert (FG72) that is environmentally safe material was tested as a nonlinear optical medium. Temporal response of the material in terms of holding efficient holographic grating was tested and found to be as high as 100 MHz.In order to realize a debris mitigation system using the phase conjugation technique, multi functional telescope equipped with a convex secondary mirror with concentric diffraction grating was proposed.

提出了一种利用高功率星载激光减缓空间碎片的方案。该计划的目标是以前没有处理过的所谓小碎片。该方案利用光学相位共轭技术，利用单个光学系统实现目标捕获、跟踪和瞄准。研究了布里渊增强四波混频相位共轭技术的基本特性，计算了空间碎片在瞬时碰撞作用下的初始碰撞，并将空间碎片推入大气上层。利用动量耦合系数（激光能量转化为激光烧蚀动量的效率）计算了所需的激光能量。因此，估计激光脉冲能量是使碎片产生足够大的轨道偏转所必需的。还计算了距离、侵入时间和偏转能量，以便设计激光系统必须产生的平均功率，然后研究了激光束的波前控制，以研究利用相位共轭进行碎片捕获、跟踪和瞄准的可行性。由各种像差引起的波前畸变的补偿程度。所测试的像差源包括透镜、柱面透镜、随机位相板。实验结果表明，对于所有的像差，保真度都在90%左右。测试了该材料在保持有效全息光栅方面的时间响应，发现其响应高达100 MHz。为了实现利用相位共轭技术的碎片减缓系统，提出了配备同心衍射光栅凸次镜的多功能望远镜。

项目成果

Uchida, Shigeaki, Imasaki, Kazuo, et al.: "Enhancement of momentum coupling efficiency using repetitive pulse ablation"Proceedings of SPIE. 4065. 495-501 (2000)

Uchida、Shigeaki、Imasaki、Kazuo 等人：“使用重复脉冲消融增强动量耦合效率”SPIE 论文集。

Uchida, Shigeaki: "Enhancement of momentum coupling efficiency using repetitive pulse ablation"Proc. SPIE. 4065. 495-501 (2000)

Uchida，Shigeaki：“使用重复脉冲消融增强动量耦合效率”Proc。

Oleg Kotyayev et al.: "Study of Possibility of Phase Conjugation of Laser Radiation by Brilloiun Enhanced Four Wave Mixing in Flourinert FC-72"電気学会論文誌 A. 119・7(to be published). (2000)

Oleg Kotyayev 等：“Study of Possibility of Phase Conjugation of Laser Radiation by Brilloiun Enhanced Four Wave Mixing in Flourinert FC-72” Transactions of the Institute of Electrical Engineers of Japan A. 119・7（待出版）。 ）

澤田寛他: "FC-72中でブリルアン増強4光波混合による増幅及び波面歪除去特性"レーザー学会学術講演会第20回年次大会予稿集. 23-23 (2000)

Hiroshi Sawada 等人：“FC-72 中布里渊增强四波混频的放大和波前畸变消除特性”第 20 届日本激光学会年会论文集（2000 年）。

Kotiaev Oleg: "Brillouin nonlinearity as a mechanism of dynamic holography"Proc. of SPIE. 4353. 266-272 (2000)

Kotiaev Oleg：“布里渊非线性作为动态全息术的机制”Proc。