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keikha M, Abedi A, Massudi R. Design of Nanosecond-Scale High-Voltage Switching Circuit for Pockels Cell-Based Q-Switching Lasers. IJOP 2024; 18 (1) :85-94
URL: http://ijop.ir/article-1-582-en.html
Design of Nanosecond-Scale High-Voltage Switching Circuit for Pockels Cell-Based Q-Switching Lasers
Mehdi Keikha *1 , Abolfazl Abedi1 , Reza Massudi1
1- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
Abstract:   (105 Views)

Electro-optic modulators are essential components in many optical systems, including laser amplifiers, Q-switching for pulsed lasers, pulse pickers for ultrafast laser systems, and pulse reshaping. Pockels cells, as the active components in an electro-optic modulator, require an electronic circuit capable of fast and clean high-voltage switching. In this paper, we report a suitable electronic circuit consisting of a chain of MOSFET transistors and evaluate its performance in terms of switching speed and precision. The results demonstrate that this circuit can generate high-voltage pulses with low power loss, rise times in the nanosecond range, and fall times in the microsecond range. Therefore, the proposed circuit can meet the diverse demands of advanced optical systems, particularly Q-switched lasers. The advantages and limitations of the circuit are analyzed, and some other potential applications are also suggested.

Keywords: Electro-optic modulators, Fast high voltage switching, MOSFET chain, Pockels cell, Q-switched lasers.
Full-Text [PDF 710 kb]   (48 Downloads)    
Type of Study: Applicable | Subject: Lasers, Optical Amplifiers, Laser Optics
Received: 2025/04/13 | Revised: 2025/09/14 | Accepted: 2025/09/7 | Published: 2024/10/7
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