Terahertz inverse synthetic aperture radar (ISAR) imaging with a quantum cascade laser transmitter

被引：79

作者：

Danylov, Andriy A. ^{[1
]}

Goyette, Thomas M. ^{[1
]}

Waldman, Jerry ^{[1
]}

Coulombe, Michael J. ^{[1
]}

Gatesman, Andrew J. ^{[1
]}

Giles, Robert H. ^{[1
]}

Qian, Xifeng ^{[2
]}

Chandrayan, Neelima ^{[2
]}

Vangala, Shivashankar ^{[2
]}

Termkoa, Krongtip ^{[2
]}

Goodhue, William D. ^{[2
]}

Nixon, William E. ^{[3
]}

机构：

[1] Univ Massachusetts Lowell, Submillimeter Wave Technol Lab, Lowell, MA 01854 USA

[2] Univ Massachusetts Lowell, Photon Ctr, Lowell, MA 01854 USA

[3] USA, Natl Ground Intelligence Ctr, Charlottesville, VA 22911 USA

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 15期

关键词：

PHASE-LOCKING; THZ; FREQUENCY;

D O I：

10.1364/OE.18.016264

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A coherent transceiver using a THz quantum cascade (TQCL) laser as the transmitter and an optically pumped molecular laser as the local oscillator has been used, with a pair of Schottky diode mixers in the receiver and reference channels, to acquire high-resolution images of fully illuminated targets, including scale models and concealed objects. Phase stability of the received signal, sufficient to allow coherent image processing of the rotating target ( in azimuth and elevation), was obtained by frequency-locking the TQCL to the free-running, highly stable optically pumped molecular laser. While the range to the target was limited by the available TQCL power ( several hundred microwatts) and reasonably strong indoor atmospheric attenuation at 2.408 THz, the coherence length of the TQCL transmitter will allow coherent imaging over distances up to several hundred meters. Image data obtained with the system is presented. (C) 2010 Optical Society of America

引用

页码：16264 / 16272

页数：9

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