Application of an Acousto-optic Laser Deflector to Interferometric Measurement of Discharges in Air

Tetsuo Fukuchi; Koshichi Nemoto; Kouji Matsumoto; Kiichiro Uchino

doi:10.1541/ieejfms.124.56

Application of an Acousto-optic Laser Deflector to Interferometric Measurement of Discharges in Air

Tetsuo Fukuchi, Koshichi Nemoto, Kouji Matsumoto, Kiichiro Uchino

Electrical Engineering Sciences

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

An acousto-optic laser deflector was applied to laser interferometric measurement of impulse discharges in air as a high-speed shutter. Laser interference fringes were obtained at exposure times of about 1 µs. The deflector was also used for time-resolved imaging of laser interference fringes by using a sequence of high frequency signals with different frequencies to deflect the laser beam to different angles at different times, allowing multiple interference images to be captured on a single video frame. Changes in laser interference fringes due to an impulse discharge in air showed electron densities of about 2×10²⁴ m⁻³ and perturbation in the neutral density expanding at speeds of about 10³ m/s.

Original language	English
Pages (from-to)	56-61
Number of pages	6
Journal	The transactions of the Institute of Electrical Engineers of Japan.A
Volume	124
Issue number	1
DOIs	https://doi.org/10.1541/ieejfms.124.56
Publication status	Published - 2004

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

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10.1541/ieejfms.124.56

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abstract = "An acousto-optic laser deflector was applied to laser interferometric measurement of impulse discharges in air as a high-speed shutter. Laser interference fringes were obtained at exposure times of about 1 µs. The deflector was also used for time-resolved imaging of laser interference fringes by using a sequence of high frequency signals with different frequencies to deflect the laser beam to different angles at different times, allowing multiple interference images to be captured on a single video frame. Changes in laser interference fringes due to an impulse discharge in air showed electron densities of about 2×1024 m−3 and perturbation in the neutral density expanding at speeds of about 103 m/s.",

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AU - Matsumoto, Kouji

AU - Uchino, Kiichiro

PY - 2004

Y1 - 2004

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AB - An acousto-optic laser deflector was applied to laser interferometric measurement of impulse discharges in air as a high-speed shutter. Laser interference fringes were obtained at exposure times of about 1 µs. The deflector was also used for time-resolved imaging of laser interference fringes by using a sequence of high frequency signals with different frequencies to deflect the laser beam to different angles at different times, allowing multiple interference images to be captured on a single video frame. Changes in laser interference fringes due to an impulse discharge in air showed electron densities of about 2×1024 m−3 and perturbation in the neutral density expanding at speeds of about 103 m/s.

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Application of an Acousto-optic Laser Deflector to Interferometric Measurement of Discharges in Air

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