Presentation Information
[9a-PA5-3]Low-Loss Large Mode Area Hollow-Core Anti-resonant Fiber for High-Power Delivery
〇(D)Arpita Pradhan1, Bishnu P. Pal1, Somnath Ghosh1 (1.Mahindra Univ.)
Keywords:
Optical fibers
The mid-infrared (mid-IR) spectral region (∼ 2--10~μm) has attracted considerable attention owing to its wide range of applications in medicine, defense, spectroscopy, sensing, astronomy, and environmental monitoring. High-power ultrafast laser systems operating in this wavelength range have demonstrated outstanding performance in applications such as LiDAR, spectroscopy, and biomedical imaging. Hollow-core anti-resonant fibers (HC-ARFs) have emerged as promising platforms for ultrafast laser delivery because of their low optical nonlinearity, high damage threshold, and reduced light--matter interaction. Nevertheless, scaling the delivered power while maintaining single-mode operation remains a significant challenge. Large-mode-area (LMA) HC-ARFs provide an effective solution for achieving high-power transmission without compromising beam quality. In this work, we propose a node-less LMA HC-ARF that exhibits a broad ultra-low-loss transmission bandwidth of 1400~nm, an ultra-low confinement loss of 0.67~dB/km, and a large mode area of approximately 22{,}100~μm^{2}, making it a promising candidate for high-power mid-IR laser delivery.