| Project/Area Number |
20F20374
|
|---|
| Research Category |
Grant-in-Aid for JSPS Fellows
|
| Allocation Type | Single-year Grants |
|---|
| Section | 外国 |
|---|
| Review Section |
Basic Section 21060:Electron device and electronic equipment-related
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
山下 真司 東京大学, 先端科学技術研究センター, 教授 (40239968)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
CHENG CHIH-HSIEN 東京大学, 先端科学技術研究センター, 外国人特別研究員
|
|---|
| Project Period (FY) |
2020-11-13 – 2023-03-31
|
| Project Status |
Completed (Fiscal Year 2022)
|
| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2022: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2021: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2020: ¥800,000 (Direct Cost: ¥800,000)
|
|---|
| Keywords | Silicon photonics / Nonlinear optics / Group-IV semiconductor / micro-ring resonator / all-optical processing / Mode-locked fiber laser / VCSEL / Nonlinear waveguide |
|---|
| Outline of Research at the Start |
In this project, we will focus and develop the novel Group-IV semiconductor based linear and nonlinear waveguide photonic devices. We will design the Group-IV semiconductor based functional devices such as the straight waveguide, micro-ring resonator,and add-drop devices by using the free-carrier absorption, nonlinear Kerr effect, and other nonlinear optical effects to construct all-optical modulation, phase-shift keying data encoder/decoder, all-optical wavelength converter and all-optical logic gate in the chip-to-chip and intra-chip transmission.
|
| Outline of Annual Research Achievements |
In this JSPS research fund between Apr.2022 and Nov. 2022, we worked on 25-Gbps all-optical data processing based on the silicon carbide (SiC) micro-ring resonator. This SiC micro-ring resonator with a nonlinear refractive index of 3.05×10-14 cm2/W of is retrieved from the pump-probe analysis. In addition, the eye diagram of the wavelength-converted data exhibits its signal-to-noise and on/off-extinction ratios (SNR and ER) of 5.6 dB and 11.8 dB, respectively. For the 25-Gbps data inversion, the SNR and ER can be evaluated as 4.8-dB and 10.2-dB, respectively. In addition, the rising and falling time in an ultrafast switching is also measured as less than 22 ps. This phenomenon causes all-optical data processing including both wavelength switching and format conversion. Therefore, the highly nonlinear optical SiC micro-ring resonator can achieve error-free operation with a bit-error ratio (BER) lower than 1×10-5 at 25 Gbps.
In taddition, the O-band Ge p-i-n photodetector (PD) are demonstrated to receive the NRZ-OOK data beyond 60 Gbps. After optimizing the transmission-line designs, the Ge PD improves its RLC response to enhance the receiving bandwidth. Decreasing the transmission-line length from 280 μm to 80 μm extends the S11 spectral response from 51 to 57 GHz. When the Ge PD is used to receive the optical NRZ-OOK data stream, the long-electrode device exhibts 53-Gbps receiving performance. The short-electrode Ge PD receives the NRZ-OOK data beyond 56 Gbps and 60 Gbps under error-free communication criterion of BER<10－12 and BER<10－9 , respectively.
|
| Research Progress Status |
令和4年度が最終年度であるため、記入しない。
|
| Strategy for Future Research Activity |
令和4年度が最終年度であるため、記入しない。
|
