| Autor: |
Curtis R. Menyuk, Jason D. McKinney, Seyed Ehsan Jamali Mahabadi, Thomas F. Carruthers, Keith J. Williams |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
IEEE Photonics Journal. 13:1-7 |
| ISSN: |
1943-0647 |
| DOI: |
10.1109/jphot.2021.3091039 |
| Popis: |
We use a drift-diffusion model that includes the effect of bleaching to study the impact of nonlinear distortion in a $p$ - $i$ - $n$ photodetector (PD) on RF-modulated frequency combs. This work complements a similar study that we carried out for a modified uni-traveling carrier (MUTC) PD. We begin by using experimental responsivity data to develop an empirical model of the bleaching in a $p$ - $i$ - $n$ PD when operating in pulsed mode. We then incorporate this model of bleaching into a drift-diffusion model. Next, we use this drift-diffusion model to determine the impact of nonlinearity on the second- and third-order intermodulation distortion products IMD2 $_n$ and IMD3 $_n$ as a function of the comb line number $n$ . We then determine the corresponding output intercept points OIP2 $_n$ and OIP3 $_n$ and distortion-to-signal ratios $\rho _{\mathrm{2}n}$ and $\rho _{\mathrm{3}n}$ . In contrast to MUTC devices, we find that bleaching increases $\rho _{\mathrm{2}n}$ and $\rho _{\mathrm{3}n}$ at all comb line numbers. However, these distortion products change little as $n$ increases, in contrast to MUTC devices where they grow rapidly as $n$ increases. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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