Terahertz-wave signal synthesizer for fiber-wireless seamless access network

2016 ◽  
Author(s):  
Atsushi Kanno ◽  
Pham Tien Dat ◽  
Norihiko Sekine ◽  
Akifumi Kasamatsu ◽  
Naokatsu Yamamoto ◽  
...  
Keyword(s):  
Access Network ◽  
Terahertz Wave ◽  
Wave Signal ◽  
Seamless Access

scholarly journals A Filterless Frequency 32-Tupling Photonic Scheme To Generate Sub-Terahertz Wave Signal Enabled By Optical Polarization Modulators

2021 ◽  
Author(s):  
Xinqiao Chen ◽  
Xiaorui Liu ◽  
Zhihan Li
Keyword(s):  
Theoretical Analysis ◽  
Radio Frequency ◽  
Suppression Ratio ◽  
Phase Shifter ◽  
Optical Signal ◽  
Terahertz Wave ◽  
Optical Polarization ◽  
Optical Carrier ◽  
Wave Signal ◽  
Thz Wave

Abstract A novel scheme based on polarization modulators to generate Sub-Terahertz wave (Sub-THz) signal with frequency 32-tupling is proposed. The system consists of two subsystems in cascade, and each subsystem consists of 4 paralleled polarization modulators. In this scheme, by properly controlling two subsystems, an optical signal with optical carrier and ±16th-order optical sidebands is achieved. Next, by adjusting the optical attenuator and optical phase shifter, the optical carrier can be canceled. Finally, the Sub-THz wave with frequency 32-tupling can be obtained after beaten in the photodetector. The results show the ±16th-order optical sideband suppression ratio (OSSR) is derived as 55.7 dB and the radio frequency sideband suppression ratio (RFSSR) of the 32-tupling Sub-THz wave is derived as 43.66 dB, which are consistent with the theoretical analysis very well. Meanwhile, the effects of phase offset, modulation index, and attenuator deviation on suppression ratio are analyzed.

Integrated Microwave Photonics: The Path to High Quality Millimeter and Terahertz Wave Signal Generation?

2019 ◽  
Author(s):  
Guillermo Carpintero ◽  
Robinson Cruzoe Guzman ◽  
Alberto Zarzuelo ◽  
Jessica Cesar ◽  
Muhsin Ali ◽  
...  
Keyword(s):  
Microwave Photonics ◽  
Terahertz Wave ◽  
Signal Generation ◽  
High Quality ◽  
Wave Signal

scholarly journals 16-QAM Vector Terahertz-wave Signal Generation by Simple MZM-Based Optical Frequency Comb

2020 ◽  
pp. 1-1
Author(s):  
Kaile Li ◽  
Yuanxian Chen ◽  
Yongtao Huang ◽  
Yitong Li ◽  
Ying Han ◽  
...  
Keyword(s):  
Frequency Comb ◽  
Terahertz Wave ◽  
Optical Frequency Comb ◽  
Signal Generation ◽  
Optical Frequency ◽  
Wave Signal

scholarly journals Opto-Electronic Oscillators for Micro- and Millimeter Wave Signal Generation

Electronics ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 857
Author(s):  
Mehmet Alp Ilgaz ◽  
Bostjan Batagelj
Keyword(s):  
Phase Noise ◽  
Millimeter Wave ◽  
Delay Line ◽  
Access Network ◽  
Local Oscillator ◽  
Signal Generation ◽  
High Frequency Signal ◽  
Wave Signal ◽  
Noise Characteristics ◽  
Low Phase Noise

High-frequency signal oscillators are devices needed for a variety of scientific disciplines. One of their fundamental requirements is low phase noise in the micro- and millimeter wave ranges. The opto-electronic oscillator (OEO) is a good candidate for this, as it is capable of generating a signal with very low phase noise in the micro- and millimeter wave ranges. The OEO consists of an optical resonator with electrical feedback components. The optical components form a delay line, which has the advantage that the phase noise is independent of the oscillator’s frequency. Furthermore, by using a long delay line, the phase noise characteristics of the oscillator are improved. This makes it possible to widen the range of possible OEO applications. In this paper we have reviewed the state of the art for OEOs and micro- and millimeter wave signal generation as well as new developments for OEOs and the use of OEOs in a variety of applications. In addition, a possible implementation of a centralized OEO signal distribution as a local oscillator for a 5G radio access network (RAN) is demonstrated.

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