Methods for measuring the RF half-wave voltage of LiNbO3 optical modulators

2005 ◽  
Vol 46 (5) ◽  
pp. 440-443 ◽  
Author(s):  
Y. Di ◽  
P. Gardner ◽  
H. Ghafouri-Shiraz
Keyword(s):  
Optical Modulators ◽  
Half Wave Voltage ◽  
Half Wave

scholarly journals Folded Heterogeneous Silicon and Lithium Niobate Mach–Zehnder Modulators with Low Drive Voltage

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 823
Author(s):  
Shihao Sun ◽  
Mengyue Xu ◽  
Mingbo He ◽  
Shengqian Gao ◽  
Xian Zhang ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Optical Networks ◽  
Transmission Lines ◽  
Optical Waveguides ◽  
Optical Loss ◽  
Optical Modulators ◽  
Drive Voltage ◽  
Half Wave Voltage ◽  
Half Wave ◽  
Overall Performance

Optical modulators were, are, and will continue to be the underpinning devices for optical transceivers at all levels of the optical networks. Recently, heterogeneously integrated silicon and lithium niobate (Si/LN) optical modulators have demonstrated attractive overall performance in terms of optical loss, drive voltage, and modulation bandwidth. However, due to the moderate Pockels coefficient of lithium niobate, the device length of the Si/LN modulator is still relatively long for low-drive-voltage operation. Here, we report a folded Si/LN Mach–Zehnder modulator consisting of meandering optical waveguides and meandering microwave transmission lines, whose device length is approximately two-fifths of the unfolded counterpart while maintaining the overall performance. The present devices feature a low half-wave voltage of 1.24 V, support data rates up to 128 gigabits per second, and show a device length of less than 9 mm.

scholarly journals Novel High-Efficiency High Step-Up DC–DC Converter with Soft Switching and Low Component Voltage Stress for Photovoltaic System

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1112
Author(s):  
Yu-En Wu ◽  
Jyun-Wei Wang
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
High Efficiency ◽  
Low Voltage ◽  
Leakage Inductance ◽  
Power Switch ◽  
Half Wave Voltage ◽  
Half Wave ◽  
Voltage Stress ◽  
Voltage Doubler

This study developed a novel, high-efficiency, high step-up DC–DC converter for photovoltaic (PV) systems. The converter can step-up the low output voltage of PV modules to the voltage level of the inverter and is used to feed into the grid. The converter can achieve a high step-up voltage through its architecture consisting of a three-winding coupled inductor common iron core on the low-voltage side and a half-wave voltage doubler circuit on the high-voltage side. The leakage inductance energy generated by the coupling inductor during the conversion process can be recovered by the capacitor on the low-voltage side to reduce the voltage surge on the power switch, which gives the power switch of the circuit a soft-switching effect. In addition, the half-wave voltage doubler circuit on the high-voltage side can recover the leakage inductance energy of the tertiary side and increase the output voltage. The advantages of the circuit are low loss, high efficiency, high conversion ratio, and low component voltage stress. Finally, a 500-W high step-up converter was experimentally tested to verify the feasibility and practicability of the proposed architecture. The results revealed that the highest efficiency of the circuit is 98%.

A New Method to Measure Half-Wave Voltage of Phase Modulator Based on Sagnac Optical-Fiber Interferometer

2011 ◽  
Vol 31 (6) ◽  
pp. 0612006
Author(s):  
魏正军 Wei Zhengjun ◽  
李华锃 Li Huazeng ◽  
王金东 Wang Jindong ◽  
刘颂豪 Liu Songhao
Keyword(s):  
Optical Fiber ◽  
New Method ◽  
Phase Modulator ◽  
Half Wave Voltage ◽  
Half Wave

Characterization of Bulk BaTiO3 Material for Optical Modulator Applications

2020 ◽  
Vol 1002 ◽  
pp. 132-139
Author(s):  
Sabah Al-Ithawi ◽  
Wasan A. Hekmat ◽  
Kadhim A. Hubeatir ◽  
Shams B. Ali ◽  
Suad M. Kadhim ◽  
...  
Keyword(s):  
Sample Size ◽  
Crystalline Structure ◽  
Figure Of Merit ◽  
Optical Modulator ◽  
Effective Parameters ◽  
Good Efficiency ◽  
Half Wave Voltage ◽  
Half Wave ◽  
Electro Optic

In this work, different sizes of BaTiO3 (BTO) were characterized. The effective parameters were studied to reach optimum performance in order to realize an optical modulator. The parameters such as spectroscopy, electro-optic coefficient, crystalline structure, and birefringence indicated that BaTiO3 has an excellent behavior to manipulate the light by Pockels modulator, spatially in the field of telecom. The sample size (10×3 mm) was shown a good performance compare with other samples, for example, the BTO has low absorption, high variation of output as a function of voltage applied and good efficiency that showed by figure of merit. In addition, a low half-wave voltage (Vπ) was observed.

Structure optimization of electro-optic polymer waveguides for low half-wave voltage modulators

2010 ◽  
Author(s):  
Hind Mahé ◽  
Dominique Bosc ◽  
Nicolas Gayet ◽  
Fabrice Odobel ◽  
Pierre-Antoinne Bonnardel ◽  
...  
Keyword(s):  
Structure Optimization ◽  
Polymer Waveguides ◽  
Half Wave Voltage ◽  
Half Wave ◽  
Electro Optic

A biased push-pull technique to achieve fractional volt half-wave voltage of Mach-Zehnder modulators

2005 ◽  
Author(s):  
Nishant P. Bhatambrekar ◽  
Anna Pyajt ◽  
Jingdong Luo ◽  
Larry Dalton ◽  
Alex K. Jen ◽  
...  
Keyword(s):  
Half Wave Voltage ◽  
Half Wave
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