Presentation Information
[25a-12P-7]Development of Optical Auto Alignment System for Homodyne Measurement
〇(B)Katsuki Nakashima1, Ryuhoh Ide1, Akito Kawasaki1, Kan Takase1,2, Mamoru Endo1,2, Warit Asavanant1,2, Akira Furusawa1,2 (1.The Univ. of Tokyo, 2.Riken RQC)
Keywords:
quantum optics
Researchers have developed various technologies for practical optical quantum computers. In conventional optical experiments, alignment has been performed manually by reading changes of measured values. However, in realization of optical quantum computers, which require more complex optical systems, it is essential to introduce an auto alignment system.
Continuous variable optical quantum computers are composed of linear optical systems and homodyne measurements. In this research, the alignment of homodyne measurement was automated by optimizing three parameters from a computer. These parameters were visibility, coupling to photodiode, and balance. As an example of the results, visibility was successfully achieved from 2.4% to 97.0% in 292 seconds. We also worked on other parameter optimizations in this study. In this presentation we will report on the latest progress. This research will be useful not only in implementing optical quantum computers, but also in reducing costs for general optical experiments with complex systems.
Continuous variable optical quantum computers are composed of linear optical systems and homodyne measurements. In this research, the alignment of homodyne measurement was automated by optimizing three parameters from a computer. These parameters were visibility, coupling to photodiode, and balance. As an example of the results, visibility was successfully achieved from 2.4% to 97.0% in 292 seconds. We also worked on other parameter optimizations in this study. In this presentation we will report on the latest progress. This research will be useful not only in implementing optical quantum computers, but also in reducing costs for general optical experiments with complex systems.