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Proceedings Paper

Detection of terahertz radiation from quantum cascade laser using vanadium oxide microbolometer focal plane arrays
Author(s): Naoki Oda; Hajime Yoneyama; Tokuhito Sasaki; Masahiko Sano; Seiji Kurashina; Iwao Hosako; Norihiko Sekine; Takayuki Sudoh; Tomoko Irie
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Paper Abstract

The authors tried real-time imaging of THz radiation from Quantum Cascade Laser (QCL), using vanadium oxide (VOx) microbolometer focal plane arrays (FPAs) of 320x240 with pitches of 37 μm and 23.5 μm as well as 640x480 with 23.5μm pitch. The QCL has such parameters as 3.1 THz emission frequency (97μm in wavelength), 300-400 nsec pulse width, 1.07 msec repetition period, 30 mW peak intensity, 15K operation temperature. The THz radiation from QCL is collimated by off-axis parabola (OAP) and focused on FPA by another OAP. The 10 μm range infrared radiation from scene is blocked by sapphire disk or metal mesh filter. Noise Equivalent Power (NEP) at 3.1 THz is estimated to be 200~400 pW.

Paper Details

Date Published: 1 May 2008
PDF: 12 pages
Proc. SPIE 6940, Infrared Technology and Applications XXXIV, 69402Y (1 May 2008); doi: 10.1117/12.781630
Show Author Affiliations
Naoki Oda, NEC Guidance and Electro-Optics Division (Japan)
Hajime Yoneyama, NEC Guidance and Electro-Optics Division (Japan)
Tokuhito Sasaki, NEC Guidance and Electro-Optics Division (Japan)
Masahiko Sano, NEC Guidance and Electro-Optics Division (Japan)
Seiji Kurashina, NEC Guidance and Electro-Optics Division (Japan)
Iwao Hosako, National Institute of Information and Communications Technology (Japan)
Norihiko Sekine, National Institute of Information and Communications Technology (Japan)
Takayuki Sudoh, Nippon Avionics Co., Ltd. (Japan)
Tomoko Irie, NEC San-ei Instruments, Ltd. (Japan)


Published in SPIE Proceedings Vol. 6940:
Infrared Technology and Applications XXXIV
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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