Study of synthetic aperture imaging using chirp microwave modulated infrared laser

2017 Fiscal Year Final Research Report

• Project/Area Number: 26289126
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Measurement engineering
• Research Institution: Fukuoka Institute of Technology
• Principal Investigator: Mase Atsushi 福岡工業大学, 付置研究所, 研究員 (00023325)
• Co-Investigator(Kenkyū-buntansha): 近木 祐一郎 福岡工業大学, 工学部, 教授 (10398109) ; 伊藤 直樹 (伊藤直樹) 宇部工業高等専門学校, 制御情報工学科, 准教授 (50604849) ; 犬竹 正明 東北大学, 電気通信研究所, その他 (90023738)
• Research Collaborator: INUTAKE Masaaki 東北大学, 電気通信研究所, 研究員 (90023738) ; IKEZI Hiroyuki 九州大学, 産学連携センター, 前客員教授
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: マイクロ波 / レーザ / 光無線融合技術 / イメージング / リモートセンシング / 防災

Outline of Final Research Achievements

We have studied an ultra-wideband microwave-modulated laser radar for improvement of the spatial resolution, and performed an experiment of imaging formation of an object. The frequency and the bandwidth are assigned by the Administration of Radio under the Ministry of Internal Affairs and Communications. There is no such limitation in the infrared region. The amplitude modulation in a range of 18GHz is applied to an infrared laser with 1550nm wavelength.
There are several benefits using microwave-modulated laser. The speckle is one of the serious problems for obtaining good signal to noise ratio in the microwave region. This problem can be eliminated because an IR laser is used as a carrier wave. The drop of coherence length can also be neglected since the data processing is performed in microwave region.
We have succeeded to obtain 3D image of objects by scanning a laser beam in two dimensions and the phase analysis of the reflected waves.

Free Research Field

マイクロ波工学、計測工学、プラズマ科学