Design and Analysis of Waveguide-Coupled Photonic THz Transmitters With an Extremely Wide Fractional Bandwidth
| Autor: | Jhih-Min Wun, Jin-Wei Shi, Hao-Chen Wang, Cooper H. Dreyfus, Rui-Lin Chao, Nan-Wei Chen, Christopher Koh |
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| Rok vydání: | 2018 |
| Předmět: |
Waveguide (electromagnetism)
Materials science Terahertz radiation business.industry Bandwidth (signal processing) Transmitter Impedance matching 020206 networking & telecommunications 02 engineering and technology Atomic and Molecular Physics and Optics Cutoff frequency 020210 optoelectronics & photonics 0202 electrical engineering electronic engineering information engineering Optoelectronics Antenna feed Photonics business |
| Zdroj: | Journal of Lightwave Technology. 36:4235-4242 |
| ISSN: | 1558-2213 0733-8724 |
| DOI: | 10.1109/jlt.2018.2808932 |
| Popis: | The design and analysis of novel waveguide-coupled photonic transmitters, which can have an extremely wide $ \pm $ 3-dB fractional optical-to-electrical (O–E) bandwidth at near the terahertz (THz) operating frequency regime (100%; 0.1–0.3 THz), are presented. This novel module is composed of a customized WR-10-based wideband antenna and an ultrafast/high-power photodiode with a 0.33-THz 3-dB O–E bandwidth, which is flip-chip bonded onto an aluminum nitride substrate, integrated with an impedance matching circuit as well as a bow-tie radiator to serve as the antenna feed. The WR-10-based dual-ridge horn structure is adopted to realize the extremely wideband antenna because the dominant TEM mode supported by the dual ridges has no cutoff frequency. The proposed antenna exhibits more than 18 dB gain across the whole operating bandwidth (0.1–0.3 THz). With the transmitter operating at an output photocurrent of 10 mA and employing the same dual ridge-horn antenna at the receiving end, we can detect a reasonable power (31.6 μ W) at 0.24 THz through 1 cm wireless transmission. |
| Databáze: | OpenAIRE |
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