Stable reference wave generation using a repeater laser for remote digital holography

We experimentally evaluate the tolerance of a repeater laser (RL) method, which generates a reference wave using a phase-locked laser. The tolerance to the optical power variation of a plane wave component in a split object wave is limited by the dynamic range of an imager to record holograms in a c...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2022-07, Vol.61 (7), p.78001
Main Authors: Sakuma, Hiroki, Akatsuka, Tomoya, Imai, Hiromitsu, Arai, Kaoru, Sugiyama, Ryuta, Oguri, Katsuya, Miyamura, Takashi
Format: Article
Language:English
Subjects:
digital holography
Locking
phase-locked laser
Photometers
Plane waves
Wave generation
wavefront measurement
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Summary:We experimentally evaluate the tolerance of a repeater laser (RL) method, which generates a reference wave using a phase-locked laser. The tolerance to the optical power variation of a plane wave component in a split object wave is limited by the dynamic range of an imager to record holograms in a conventional method, whereas it is limited by that of a photodetector for phase-locking in the RL method. The RL method using a commercial imager and photodetector achieved constant high measurement accuracy under the varying range of 50 dB and 100 times higher tolerance than the conventional method.
ISSN:0021-4922
1347-4065
DOI:10.35848/1347-4065/ac72de