Affiliation:
1. The Hong Kong Polytechnic University
2. The Hong Kong Polytechnic University Shenzhen Research Institute
3. Institute of Photonics Technology, Jinan University
Abstract
We studied the effect of varying gas concentration, buffer gas, length, and type of fibers on the performance of optical fiber photothermal phase modulators based on C2H2-filled hollow-core fibers. For the same control power level, the phase modulator with Ar as the buffer gas achieves the largest phase modulation. For a fixed length of hollow-core fiber, there exists an optimal C2H2 concentration that achieves the largest phase modulation. With a 23-cm-long anti-resonant hollow-core fiber filled with 12.5% C2H2 balanced with Ar, phase modulation of π-rad at 100 kHz is achieved with a control power of 200 mW. The modulation bandwidth of the phase modulator is 150 kHz. The modulation bandwidth is extended to ∼1.1 MHz with a photonic bandgap hollow-core fiber of the same length filled with the same gas mixture. The measured rise and fall time of the photonic bandgap hollow-core fiber phase modulator are 0.57 µs and 0.55 µs, respectively.
Funder
National Key Research and Development Program of China
Local Innovative and Research Teams Project of Guangdong Pear River Talents Program
National Natural Science Foundation of China
Hong Kong Polytechnic University
Subject
Atomic and Molecular Physics, and Optics
Cited by
1 articles.
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