1 June 2017 Optimizing an integrated waveguide modulator for sensitive low-frequency alternating-current electric-field sensors
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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 V π 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 V π and electrical bandwidth before testing the sensor sensitivity. The results show that reducing the segment width achieves a low V π 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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Musab A. M. Al-Tarawni, A. Ashrif A. Bakar, Ahmad Rifqi Md Zain, Mou’ad A. Tarawneh, Sahrim Hj. Ahmad, "Optimizing an integrated waveguide modulator for sensitive low-frequency alternating-current electric-field sensors," Optical Engineering 56(6), 067101 (1 June 2017). https://doi.org/10.1117/1.OE.56.6.067101 . Submission: Received: 5 April 2017; Accepted: 16 May 2017
Received: 5 April 2017; Accepted: 16 May 2017; Published: 1 June 2017
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