2022 Fiscal Year Final Research Report
Study on a photodetector using optically-amplified feedback circuit with high optical power resolutions
| Project/Area Number |
19K04410
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 21030:Measurement engineering-related
|
|---|
| Research Institution | Shimane University |
|---|
Principal Investigator |
MASUDA Hiroji 島根大学, 学術研究院理工学系, 教授 (60583127)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
長瀬 亮 千葉工業大学, 工学部, 教授 (40570685)
北村 心 島根大学, 学術研究院理工学系, 助教 (60549179)
|
|---|
| Project Period (FY) |
2019-04-01 – 2023-03-31
|
| Keywords | 光ファイバセンシング / 増幅自然放出光 / 非線形 |
|---|
| Outline of Final Research Achievements |
We have proposed a novel technique called “OAFD” that can significantly improve the optical power resolution (OPR) of a photodetector using an optically amplified feedback circuit (ASEFC) in the optical sensing research/application area. The improvement factor is denoted as IF. We also clarified experimentally and theoretically the characteristics and performance of the proposed technique so that IFs of the order of approximately 100 were achieved. When we constructed a temperature controlled OAFC in which the temperature of the gain medium used was kept constant, there was no influence of the intrinsic internal noise to the OPR, and we successfully achieved an OPR of the order of 0.1 mdB (mdB: milli dB) for our proposed OAFD. In the period of study of four years, we have achieved two journal papers accepted, three international conference papers with review, and 38 proceeding papers of domestic conferences.
|
| Free Research Field |
光計測
|
| Academic Significance and Societal Importance of the Research Achievements |
光計測分野において、光検出器は最も基本的な測定器の一つであり、光パワー測定における高分解能化、すなわち、光パワー変動における高感度化は、重要な研究課題である。本提案の光増幅帰還回路OAFCを用いた光増幅帰還型光検出器OAFDにより、レーザ光源出力パワーの微少変動、各種光部品の損失・利得、歪などの微少変動を極めて高い光パワー分解能（従来技術の10～100倍以上、分解能の数値としては10～100分の1以下）で測定可能であることを実証している。本提案OAFDは、新原理「高スロープの非線形領域動作」に基づいて動作する光検出器であり、関連する学術及び技術分野に対して、大きな寄与と波及効果を有する。
|
