C2H2 Gas Laser Inside Hollow-Core Photonic Crystal Fiber Based on Population Inversion

Abstract

Abstract:Lasing from population inversion is demonstrated from gas contained in a hollow-core kagome structured photonic crystal fiber. Laser pulses in the mid-IR (3.1-3.2 µm) were generated by optically pumping at λ ~ 1.5 µm.

Gas-Filled Hollow Core Fiber Lasers Based on Population Inversion

“…This grant began after the initial demonstration of the HOFGLAS, but has made possible the improvement in stability and quantitative assessment, the demonstration in HCN, CO and CO 2 , and most particularly the improvement in fiber loss due to the fabrication of extremely low loss fibers spanning the near and mid-IR. We have published much of this work in an invited review paper [1], a Ph.D. thesis [2], and in additional journal and conference publications [3][4][5][6][7][8]. Furthermore, groundwork for additional progress in CW C 2 H 2 lasers and I 2 lasers has been laid with this grant, and should see fruition soon.…”

Generation of a low divergent supercontinuum for mid-IR high power delivery through a large mode area photonic bandgap fiber

“…Recently the mid-IR spectral domain, with the development of ultra low-loss transmission fibers using novel materials, has been recognized to be the best avenue for this targeted paradigm shift in optical communication. With the advent of reasonably transparent materials such as soft glasses, chalcogenide glasses, fluoride glasses in the wavelength range of 2-10 µm, and the development of mature fabrication technologies based on extrusion and other suitably modified state-of-the-art methods such as chemical vapour deposition (CVD) and modified CVD (MCVD), the ongoing research to develop active as well as passive devices and components for mid-IR applications has gained huge momentum [5][6][7][8][9][10]. Discrete/continuum mid-IR light sources based on optical fiber geometry are the building blocks for most of these applications [11][12][13].…”

Low Loss, Wide Bandwidth, Low Bend Sensitivity HC-PBGF for Mid-IR Applications

“…Hollow core fibers have several applications in the mid-IR including gas sensing [1], gas lasers [2] and high power laser delivery for medical applications [3]. While soft glass based structures have been favored for transmission in this wavelength region, due to their lower material attenuation compared to more conventional silica beyond 2.5 µm [4], several low loss hollow core silica-based fibers have recently been reported which deliver low loss guidance up to 4 µm (e.g.…”