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Proceedings Article

Detection of terahertz radiation from quantum cascade laser using vanadium oxide microbolometer focal plane arrays

[+] Author Affiliations
Naoki Oda, Hajime Yoneyama, Tokuhito Sasaki, Masahiko Sano, Seiji Kurashina

NEC Guidance and Electro-Optics Division (Japan)

Iwao Hosako, 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)

Proc. SPIE 6940, Infrared Technology and Applications XXXIV, 69402Y (May 01, 2008); doi:10.1117/12.781630
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From Conference Volume 6940

  • Infrared Technology and Applications XXXIV
  • Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton
  • Orlando, FL | March 16, 2008

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.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Naoki Oda ; Hajime Yoneyama ; Tokuhito Sasaki ; Masahiko Sano ; Seiji Kurashina, et al.
"Detection of terahertz radiation from quantum cascade laser using vanadium oxide microbolometer focal plane arrays", Proc. SPIE 6940, Infrared Technology and Applications XXXIV, 69402Y (May 01, 2008); doi:10.1117/12.781630; http://dx.doi.org/10.1117/12.781630


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