Systematic Analysis of a Modified Uni-Traveling-Carrier Photodiode under High-Power Operating Conditions
| Autor: | Wanshu Xiong, Zhangwan Peng, Ruoyun Yao, Qianwen Guo, Chaodan Chi, Chen Ji |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Photonics, Vol 10, Iss 4, p 471 (2023) |
| Druh dokumentu: | article |
| ISSN: | 10040471 2304-6732 |
| DOI: | 10.3390/photonics10040471 |
| Popis: | We theoretically analyzed the detailed carrier transport process based on the drift-diffusion model in the InGaAs/InP modified Uni-Traveling-Carrier Photodiode (MUTC-PD) under high optical input power conditions. A high-speed MUTC-PD design was simulated in depth using the commercial simulation software APSYS. The complex interplay between photo-electron and hole transport processes was quantitatively analyzed. The slowdown of hole transit time due to E field reduction in the undoped InGaAs absorber layer dominated the response speed of MUTC-PDs at a high optical power level. The optimized MUTC-PD design has a relatively strong dependence on optical power level. Based on an optimized design, an O–E conversion responsivity around 0.15 A/W and the intrinsic 3 dB bandwidth of 172 GHz were demonstrated when the input optical power density reached 20 mW/μm2. Our simulation analysis results presented here can be utilized for designing broadband MUTC-PDs in future sub-Terahertz free-space data link applications. |
| Databáze: | Directory of Open Access Journals |
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