We present the fabrication and light transmission through a hollow core fiber bundle with seven cores arranged in a hexagonal pattern. Each individual core facilitates independent light propagation and exhibits several transmission windows in the near infrared region. The lowest measured loss is 2.5 dB/m near 600 nm, with the broadest transmission window located between 1250 nm and 1450 nm with a loss of 4 dB/m.
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Sufian et al. (2024) studied this question.
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