Materials, Photonic Devices, and Sensors

Optimizing an integrated waveguide modulator for sensitive low-frequency alternating-current electric-field sensors

[+] Author Affiliations
Musab A. M. Al-Tarawni, A. Ashrif A. Bakar

National University of Malaysia, Department of Electrical, Electronic and System Engineering, Faculty of Engineering and Built Environment, Bangi, Malaysia

Ahmad Rifqi Md Zain

National University of Malaysia, Institute of Microengineering and Nanoelectronics, Bangi, Malaysia

Harvard University, School of Engineering and Applied Science, John A. Paulson, Cambridge, Massachusetts, United States

Mou’ad A. Tarawneh

Al-Hussein Bin Talal University, College of Science, Department of Physics, Ma’an, Jordan

Sahrim Hj. Ahmad

National University of Malaysia, Faculty of Science and Technology, Bangi, Malaysia

Opt. Eng. 56(6), 067101 (Jun 01, 2017). doi:10.1117/1.OE.56.6.067101
History: Received April 5, 2017; Accepted May 16, 2017
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Abstract.  The use of integrated waveguide modulators is a common technique in electric-field sensing. However, the distortion in the modulated signal caused by high half-voltage Vπ and the difficulty in obtaining low-frequency responses are challenging issues for the use of low-frequency alternating-current (AC) electric-field sensors. This study investigates the use of an optimized segmented slot waveguide as the core of a sensor to determine the sensor features that produce useful frequency responses and sensitivity. The segmented slot waveguide is optimized in terms of periodicity and segment width to produce low Vπ and electrical bandwidth before testing the sensor sensitivity. The results show that reducing the segment width achieves a low Vπ of 0.32 V and a very low electrical bandwidth of 4.3 kHz. Our study provides evidence of the feasibility of using a segmented slot waveguide as the primary element for highly sensitive, low-frequency AC electric-field sensors.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Musab A. M. Al-Tarawni ; A. Ashrif A. Bakar ; Ahmad Rifqi Md Zain ; Mou’ad A. Tarawneh and Sahrim Hj. Ahmad
"Optimizing an integrated waveguide modulator for sensitive low-frequency alternating-current electric-field sensors", Opt. Eng. 56(6), 067101 (Jun 01, 2017). ; http://dx.doi.org/10.1117/1.OE.56.6.067101


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