A New Optical Angle Measurement Method Based on Second Harmonic Generation with a Mode-Locked Femtosecond Laser

Hiraku Matsukuma; Shuhei Madokoro; Wijayanti Dwi Astuti; Yuki Shimizu; Wei Gao

doi:10.1007/s41871-019-00052-4

A New Optical Angle Measurement Method Based on Second Harmonic Generation with a Mode-Locked Femtosecond Laser

Hiraku Matsukuma, Shuhei Madokoro, Wijayanti Dwi Astuti, Yuki Shimizu, Wei Gao

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

14 Citations (Scopus)

Abstract

This paper proposes a new optical angle measurement method based on second harmonic generation with a mode-locked femtosecond laser source by taking use of the unique characteristic of high peak power and high-intensity electric field of the femtosecond laser pulses. The angle is measured from the second harmonic wave intensity, which is a function of the angle between the laser beam axis and the optic axis of a nonlinear crystal attached to the target of interest. It is found that the beta barium borate (BBO) crystal is suitable as the nonlinear crystal for this purpose through theoretical simulation. As the first step of research, an experimental demonstration is also carried out in such a way that a change of the second harmonic wave intensity due to the angular displacement of BBO crystal is measured to verify the feasibility of the proposed principle of the angle measurement method.

Original language	English
Pages (from-to)	187-198
Number of pages	12
Journal	Nanomanufacturing and Metrology
Volume	2
Issue number	4
DOIs	https://doi.org/10.1007/s41871-019-00052-4
Publication status	Published - 2019 Dec 1
Externally published	Yes

Keywords

Angle measurement
Femtosecond laser
Second harmonic generation

ASJC Scopus subject areas

Industrial and Manufacturing Engineering
Mechanical Engineering
Materials Science (miscellaneous)

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10.1007/s41871-019-00052-4

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title = "A New Optical Angle Measurement Method Based on Second Harmonic Generation with a Mode-Locked Femtosecond Laser",

abstract = "This paper proposes a new optical angle measurement method based on second harmonic generation with a mode-locked femtosecond laser source by taking use of the unique characteristic of high peak power and high-intensity electric field of the femtosecond laser pulses. The angle is measured from the second harmonic wave intensity, which is a function of the angle between the laser beam axis and the optic axis of a nonlinear crystal attached to the target of interest. It is found that the beta barium borate (BBO) crystal is suitable as the nonlinear crystal for this purpose through theoretical simulation. As the first step of research, an experimental demonstration is also carried out in such a way that a change of the second harmonic wave intensity due to the angular displacement of BBO crystal is measured to verify the feasibility of the proposed principle of the angle measurement method.",

keywords = "Angle measurement, Femtosecond laser, Second harmonic generation",

author = "Hiraku Matsukuma and Shuhei Madokoro and Astuti, {Wijayanti Dwi} and Yuki Shimizu and Wei Gao",

note = "Funding Information: Grants-in-Aid for Scientific Research (KAKENHI), Japan Society for the Promotion of Science (JSPS). Publisher Copyright: {\textcopyright} 2019, International Society for Nanomanufacturing and Tianjin University and Springer Nature Singapore Pte Ltd.",

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doi = "10.1007/s41871-019-00052-4",

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AU - Matsukuma, Hiraku

AU - Madokoro, Shuhei

AU - Astuti, Wijayanti Dwi

AU - Shimizu, Yuki

AU - Gao, Wei

N1 - Funding Information: Grants-in-Aid for Scientific Research (KAKENHI), Japan Society for the Promotion of Science (JSPS). Publisher Copyright: © 2019, International Society for Nanomanufacturing and Tianjin University and Springer Nature Singapore Pte Ltd.

PY - 2019/12/1

Y1 - 2019/12/1

N2 - This paper proposes a new optical angle measurement method based on second harmonic generation with a mode-locked femtosecond laser source by taking use of the unique characteristic of high peak power and high-intensity electric field of the femtosecond laser pulses. The angle is measured from the second harmonic wave intensity, which is a function of the angle between the laser beam axis and the optic axis of a nonlinear crystal attached to the target of interest. It is found that the beta barium borate (BBO) crystal is suitable as the nonlinear crystal for this purpose through theoretical simulation. As the first step of research, an experimental demonstration is also carried out in such a way that a change of the second harmonic wave intensity due to the angular displacement of BBO crystal is measured to verify the feasibility of the proposed principle of the angle measurement method.

AB - This paper proposes a new optical angle measurement method based on second harmonic generation with a mode-locked femtosecond laser source by taking use of the unique characteristic of high peak power and high-intensity electric field of the femtosecond laser pulses. The angle is measured from the second harmonic wave intensity, which is a function of the angle between the laser beam axis and the optic axis of a nonlinear crystal attached to the target of interest. It is found that the beta barium borate (BBO) crystal is suitable as the nonlinear crystal for this purpose through theoretical simulation. As the first step of research, an experimental demonstration is also carried out in such a way that a change of the second harmonic wave intensity due to the angular displacement of BBO crystal is measured to verify the feasibility of the proposed principle of the angle measurement method.

KW - Angle measurement

KW - Femtosecond laser

KW - Second harmonic generation

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ER -

A New Optical Angle Measurement Method Based on Second Harmonic Generation with a Mode-Locked Femtosecond Laser

Abstract

Keywords

ASJC Scopus subject areas

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