2021 Fiscal Year Final Research Report
spatial mode conversion technique by using a spatial light modulator and an optical diffuser
| Project/Area Number |
20K22416
|
|---|
| Research Category |
Grant-in-Aid for Research Activity Start-up
|
| Allocation Type | Multi-year Fund |
|---|
| Review Section |
0302:Electrical and electronic engineering and related fields
|
|---|
| Research Institution | Aoyama Gakuin University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2020-09-11 – 2022-03-31
|
| Keywords | モード分割多重伝送 / 空間光変調器 / 空間モード変換 / 光ファイバ通信 |
|---|
| Outline of Final Research Achievements |
In this study, we aimed to establish the technique of the spatial mode conversion from higher order modes, toward the realization of flexible routing based on spatial modes in the future mode-division multiplexed network. In the first year, we showed that the spatial cross modulation can be applied to the mode conversion from higher-order modes by subtracting the input phase distribution from the phase modulation function to be displayed on the spatial light modulator. In the second year, we confirmed that the progress of the optimization in the direction of improving both insertion loss and crosstalk by introducing the generic algorithm to the process to calculate the phase modulation function. In addition, we conducted an experiment on the mode conversion from higher-order modes and evaluated the performance of the conversion.
|
| Free Research Field |
光情報処理
|
| Academic Significance and Societal Importance of the Research Achievements |
本研究が挑戦した「あらゆる空間モードを自在に変換する技術」の確立は，将来の超大容量光ファイバネットワークにおけるフレキシブルなルーティングの実現に寄与するものである．実験では，実験環境の困難さから現行の400 Gbit/s伝送システムで採用されている16QAM信号のクロストークしきい値である－25 dBを満足する精度は得られなかったが，数値解析では極めて高い精度での変換が可能であることが示された．また，提案技術では任意の波面を全く異なる別の波面へと変換することができるため，空間モード変換以外にも，「補償光学」や「3Dディスプレイ」など他分野への応用が期待できる．
|
