This paper presents an optical angle sensor using characteristics of second harmonic generation (SHG) which is a nonlinear process of electromagnetic field. In a SHG process, the fundamental wave is made incidence into a non-linear optical crystal. The second harmonic wave which has double frequency of the fundamental wave is then generated. The light intensity of the generated second harmonic wave changes with the incident angle of the fundamental wave to the non-linear optical crystal due to phase mismatch which is a factor of determining the conversion efficiency of SHG. The dependence of second harmonic generation on angular displacement is calculated theoretically for mode-locked femto second laser light source. Experiment is also carried out in order to demonstrate the theoretical calculation.
|ジャーナル||Proceedings of SPIE - The International Society for Optical Engineering|
|出版ステータス||Published - 2019|
|イベント||Optical Technology and Measurement for Industrial Applications Conference 2019 - Yokohama, Japan|
継続期間: 2019 4 22 → 2019 4 26
ASJC Scopus subject areas
- コンピュータ サイエンスの応用