Computational Study of Amplitude-to-Phase Conversion in a Modified Unitraveling Carrier Photodetector
We calculate the amplitude-to-phase (AM-to-PM) noise conversion in a modified unitraveling carrier photodetector. We obtained two nulls as measured in the experiments, and we explain their origin. The nulls appear due to the transit time variation when the average photocurrent varies, and the transi...
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IEEE
2017-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/7879266/ |
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| author | Yue Hu Curtis R. Menyuk Xiaojun Xie Meredith N. Hutchinson Vincent J. Urick Joe C. Campbell Keith J. Williams |
| author_facet | Yue Hu Curtis R. Menyuk Xiaojun Xie Meredith N. Hutchinson Vincent J. Urick Joe C. Campbell Keith J. Williams |
| author_sort | Yue Hu |
| collection | DOAJ |
| description | We calculate the amplitude-to-phase (AM-to-PM) noise conversion in a modified unitraveling carrier photodetector. We obtained two nulls as measured in the experiments, and we explain their origin. The nulls appear due to the transit time variation when the average photocurrent varies, and the transit time variation is due to the change of electron velocity when the average photocurrent varies. We also show that the AM-to-PM conversion coefficient depends only on the pulse energy and is independent of the pulse duration when the duration is less than 500 fs. When the pulse duration is larger than 500 fs, the nulls of the AM-to-PM conversion coefficient shift to larger average photocurrents. This shift occurs because the increase in that pulse duration leads to a decrease in the peak photocurrent. The AM-to-PM noise conversion coefficient changes as the repetition rate varies. However, the repetition rate does not change the AM-to-PM conversion coefficient as a function of input optical pulse energy. The repetition rate changes the average photocurrent. We propose a design that would in theory improve the performance of the device. |
| format | Article |
| id | doaj-art-cc0c099f74cf435189faeb2f4c448e94 |
| institution | DOAJ |
| issn | 1943-0655 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-cc0c099f74cf435189faeb2f4c448e942025-08-20T02:42:00ZengIEEEIEEE Photonics Journal1943-06552017-01-019211110.1109/JPHOT.2017.26822517879266Computational Study of Amplitude-to-Phase Conversion in a Modified Unitraveling Carrier PhotodetectorYue Hu0Curtis R. Menyuk1Xiaojun Xie2Meredith N. Hutchinson3Vincent J. Urick4Joe C. Campbell5Keith J. Williams6Department of Computer Science and Electrical Engineering, University of Maryland Baltimore County, Baltimore, MD, USAUniversity of Maryland Baltimore County, Baltimore, MD, USAUniversity of Virginia, Charlottesville, VA, USANaval Research Laboratory, Washington, DC, USANaval Research Laboratory, Washington, DC, USAUniversity of Virginia, Charlottesville, VA, USANaval Research Laboratory, Washington, DC, USAWe calculate the amplitude-to-phase (AM-to-PM) noise conversion in a modified unitraveling carrier photodetector. We obtained two nulls as measured in the experiments, and we explain their origin. The nulls appear due to the transit time variation when the average photocurrent varies, and the transit time variation is due to the change of electron velocity when the average photocurrent varies. We also show that the AM-to-PM conversion coefficient depends only on the pulse energy and is independent of the pulse duration when the duration is less than 500 fs. When the pulse duration is larger than 500 fs, the nulls of the AM-to-PM conversion coefficient shift to larger average photocurrents. This shift occurs because the increase in that pulse duration leads to a decrease in the peak photocurrent. The AM-to-PM noise conversion coefficient changes as the repetition rate varies. However, the repetition rate does not change the AM-to-PM conversion coefficient as a function of input optical pulse energy. The repetition rate changes the average photocurrent. We propose a design that would in theory improve the performance of the device.https://ieeexplore.ieee.org/document/7879266/Photodetectoramplitude-to-phase (AM-to-PM)microwave generation. |
| spellingShingle | Yue Hu Curtis R. Menyuk Xiaojun Xie Meredith N. Hutchinson Vincent J. Urick Joe C. Campbell Keith J. Williams Computational Study of Amplitude-to-Phase Conversion in a Modified Unitraveling Carrier Photodetector IEEE Photonics Journal Photodetector amplitude-to-phase (AM-to-PM) microwave generation. |
| title | Computational Study of Amplitude-to-Phase Conversion in a Modified Unitraveling Carrier Photodetector |
| title_full | Computational Study of Amplitude-to-Phase Conversion in a Modified Unitraveling Carrier Photodetector |
| title_fullStr | Computational Study of Amplitude-to-Phase Conversion in a Modified Unitraveling Carrier Photodetector |
| title_full_unstemmed | Computational Study of Amplitude-to-Phase Conversion in a Modified Unitraveling Carrier Photodetector |
| title_short | Computational Study of Amplitude-to-Phase Conversion in a Modified Unitraveling Carrier Photodetector |
| title_sort | computational study of amplitude to phase conversion in a modified unitraveling carrier photodetector |
| topic | Photodetector amplitude-to-phase (AM-to-PM) microwave generation. |
| url | https://ieeexplore.ieee.org/document/7879266/ |
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