Photonic integrated circuits for terahertz source generation

Hou, Lianping; Song, Tao; Hou, Bin; Marsh, J.H.

doi:10.1049/iet-opt.2019.0089

Cited by 7 publications

(2 citation statements)

References 24 publications

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“…On the other hand, the opto-electronics approach which based on photonic generation on a high data rate THz signal. There are some approaches, such as Photonic Integrated Circuits (PICs) [18], Quantum Cascade Lasers (QCLs) [19], and photomixers or photodiodes [20].…”

Section: Thz Waves: Meeting High-speed Communication Needsmentioning

confidence: 99%

Phase Stabilization of a Terahertz Wave Using Mach–Zehnder Interference Detection

Ibrahim

et al. 2023

Electronics

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As a high-frequency carrier, the terahertz (THz) wave is essential for achieving high-data-rate wireless transmission due to its ultra-wide bandwidth. Phase stabilization becomes crucial to enable phase-shift-based multilevel modulation for high-speed data transmission. We developed a Mach–Zehnder interferometric phase stabilization technique for photomixing, which has proved a promising method for phase-stable continuous THz-wave generation. However, this method faced inefficiencies in generating phase-modulated THz waves due to the impact of the phase modulator on the phase stabilization system. By photomixing, which is one of the promising methods for generating THz waves, the phase of the generated THz waves can be controlled in the optical domain so that the stability of the generated THz wave can be controlled by photonics technologies. Thus, we devised a new phase stabilization approach using backward-directional lightwave, which is overlapped with the THz wave generation system. This study presented a conceptual and experimental framework for stabilizing the phase differences of optical carrier signals. We compared the optical domain and transmission performances between forward-directional and backward-directional phase stabilization methods. Remarkably, our results demonstrated error-free transmission at a modulation frequency of 3 Gbit/s and higher.

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Section: Thz Waves: Meeting High-speed Communication Needsmentioning

confidence: 99%

Phase Stabilization of a Terahertz Wave Using Mach–Zehnder Interference Detection

Ibrahim

et al. 2023

Electronics

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“…To achieve higher optical power and keep the noise figure at the minimum, a hybrid III–V silicon nitride laser has achieved a record on-chip power of up to 20.7 dBm, a tuning range of 120 nm, and an ultralow linewidth of 320 Hz [ 80 ]. Although the existing integrated lasers which have been used for THz generation are mostly based on III–V distributed feedback (DFB) and distributed Bragg Reflector (DBR) lasers [ 81 , 82 , 83 , 84 , 85 , 86 , 87 ], as shown in Figure 5 b,c, it can be predicted that hybrid and heterogeneously integrated silicon lasers with higher performance have the potential to achieve the target metrics and extend their applicability in THz band.…”

Section: Silicon Photonics For Thz Techniquesmentioning

confidence: 99%

A Review on Terahertz Technologies Accelerated by Silicon Photonics

Xie

Zhou

et al. 2021

Nanomaterials

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In the last couple of decades, terahertz (THz) technologies, which lie in the frequency gap between the infrared and microwaves, have been greatly enhanced and investigated due to possible opportunities in a plethora of THz applications, such as imaging, security, and wireless communications. Photonics has led the way to the generation, modulation, and detection of THz waves such as the photomixing technique. In tandem with these investigations, researchers have been exploring ways to use silicon photonics technologies for THz applications to leverage the cost-effective large-scale fabrication and integration opportunities that it would enable. Although silicon photonics has enabled the implementation of a large number of optical components for practical use, for THz integrated systems, we still face several challenges associated with high-quality hybrid silicon lasers, conversion efficiency, device integration, and fabrication. This paper provides an overview of recent progress in THz technologies based on silicon photonics or hybrid silicon photonics, including THz generation, detection, phase modulation, intensity modulation, and passive components. As silicon-based electronic and photonic circuits are further approaching THz frequencies, one single chip with electronics, photonics, and THz functions seems inevitable, resulting in the ultimate dream of a THz electronic–photonic integrated circuit.

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