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We report the highest pulse energy from a mid-IR acetylene-filled hollow-core fiber laser. The 1.41 μJ, ns pulses are emitted at 3.11 μm and 3.17 μm with 30 Hz repetition rate, ∼20% overall efficiency at 9.8 torr.
Toward an all-fiber system, an erbium fiber laser-based comb is directly stabilized to a 12C2H2 transition at 1539.4 nm. The comb fractional instability at 1532.8 nm is 6×10−12 at 100 ms gate time.
A newly-developed, single-mode hollow-core fiber is employed for saturated absorption spectroscopy in a molecular gas. Lack of surface modes, ease of angle splicing, and single-modedness make it promising for portable frequency references.
A potentially portable optical metrology system is demonstrated by using an acetylene-filled optical fiber frequency reference as an optical reference to a fiber-laser based frequency comb without an intracavity EOM.
A repeatable, robust, low-loss angle splice between large-core kagome hollow-core photonic crystal fiber and a solid single-mode fiber is achieved. Saturated absorption spectroscopy is performed inside acetylene-filled kagome with one end angle spliced to SMF.
A CW fiber laser is stabilized to near-infrared transitions of 12C2H2 inside kagome fibers and characterized with a frequency comb. ±10 kHz accuracy is achieved, and performance in sealed photonics microcells is explored.
We demonstrate what we believe is the first hollow fiber gas laser based on population inversion. A single-cell-defect Kagome fiber with a core diameter of about 40 microns was filled with a few torr of acetylene (12C2H2). Acetylene has absorption transitions in the attractive telecommunication C band region and recently lasing was observed at about 3 microns from a gas cell when optically pumped...
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