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High-speed and wide-range swept source using acousto-optic deflector as tunable grating and its application on OCT

Research Project

Project/Area Number 21K04922
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 30020:Optical engineering and photon science-related
Research InstitutionNiigata University

Principal Investigator

Suzuki Takamasa  新潟大学, 自然科学系, 教授 (40206496)

Co-Investigator(Kenkyū-buntansha) 崔 森悦  新潟大学, 自然科学系, 准教授 (60568418)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords波長走査光源 / OCT / 音響光学デバイス / 周期可変回折格子 / 音響光学偏向器
Outline of Research at the Start

超音波偏向器(AOD)を単なる光偏向の用途だけではなく同時に、周期可変な回折格子として用い、従来の波長走査光源に比べてシンプルかつ広帯域な波長走査光源を実現する。これにより、1)波長走査範囲の飛躍的な拡大と性能向上、2)新規 SS 光源の光コヒーレンストモグラフィへの展開を図る。

Outline of Final Research Achievements

A wavelength scanning light sources (SSs) using an acousto-optic (AO) device as tunable grating were constructed. Additionally, its characteristics and performance as an OCT light source were examined. The SSs were assembled in three wavelength bands: 840nm, 1060nm, and 1310nm. We confirmed that the wavelength scanning characteristics in the 840nm and 1310nm bands agreed with the the theoretical calculations. However, in the 1060nm band, we could not make detailed characteristics evaluations because of the heat-dissipation problem at the AO device. Further, we confirmed that the OCT equipped with our SS operating at the 1310 nm band can accurately measured the cross-sectional structure of the object.
All results of the research were presented at one international conference and two academic papers, and one patent application was filed.

Academic Significance and Societal Importance of the Research Achievements

眼や皮膚などに光を当てて非接触かつ非侵襲で計測し、医療診断を行う光コヒーレンストモグラフィ(OCT)と呼ばれる装置がある。OCTの光源としてよく用いられるのが波長を時間的に変化させる波長走査光源(SS)である。
これまでSSの構築には、波長選択と光偏向を行う光学素子をセットで用いることが当然と考えられてきたが、本研究では、その両方を1つの素子で実現する手法を提案し、その優位性を明らかにした(学術的意義)。本研究で提案したSSは、コンパクトかつ安価であり、波長の走査速度も速い。また、イメージングに必要な信号処理も高速に行えるため、高速かつ高精度なOCT装置を実現することが可能となる(社会的意義)。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (6 results)

All 2023 2022 2021

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Linear-wavenumber swept source based on an acousto-optic device for optical coherence tomography2023

    • Author(s)
      Ji Xuanxuan、Suzuki Takamasa、Choi Samuel、Sasaki Osami、Pu Jixiong
    • Journal Title

      Optics Express

      Volume: 31 Issue: 26 Pages: 44611-44621

    • DOI

      10.1364/oe.509217

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] External-cavity laser diode using acousto-optic deflector as tunable grating2022

    • Author(s)
      Suzuki T, Kaneko Y, Choi S, and Sasaki O.
    • Journal Title

      Optics Letters

      Volume: 47 Issue: 7 Pages: 1871-1874

    • DOI

      10.1364/ol.454021

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Optical coherence tomography based on a linear wavenumber swept-source2023

    • Author(s)
      Ji Xuanxuan、Suzuki Takamasa、Choi Samuel、Sasaki Osami
    • Organizer
      The 14th Japan-Finland Joint Symposium on Optics in Engineering
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 周期可変回折格子を用いた高速広帯域波長走査光源の開発2023

    • Author(s)
      金子 優月,鈴木 孝昌,崔 森悦
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] 周期可変回折格子を用いた高速広帯域波長走査光源の構築2021

    • Author(s)
      金子 優月,鈴木 孝昌,崔 森悦
    • Organizer
      令和3年(第31回)電気学会東京支部新潟支所研究発表会
    • Related Report
      2021 Research-status Report
  • [Patent(Industrial Property Rights)] レーザー装置2021

    • Inventor(s)
      鈴木孝昌
    • Industrial Property Rights Holder
      国立大学法人新潟大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-102910
    • Filing Date
      2021
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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