Search Results - "Hald, Jan"

Saturated absorption in acetylene and hydrogen cyanide in hollow-core photonic bandgap fibers by Henningsen, Jes, Hald, Jan, Peterson, Jan C

“…Saturated absorption is studied in overtone transitions of C2H2 and H13CN molecules confined in the hollow core of a photonic bandgap fiber. The dynamics of…”
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High resolution spectroscopy of ammonia in a hollow-core fiber by Cubillas, Ana M, Hald, Jan, Petersen, Jan C

“…We have demonstrated frequency modulation saturation spectroscopy of the nu(1) +nu(3) band of ammonia in hollow-core photonic bandgap fibers (HC-PBFs)…”
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Generation of UV light by frequency doubling in BIBO by Ruseva, Valentina, Hald, Jan

“…We consider generation of 384 nm UV radiation by cavity enhanced second harmonic generation. The newly developed BIBO (BiB 3O 6) crystal is compared to a LBO…”
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Portable optical frequency standard based on sealed gas-filled hollow-core fiber using a novel encapsulation technique by Triches, Marco, Brusch, Anders, Hald, Jan

“…A portable stand-alone optical frequency standard based on a gas-filled hollow-core photonic crystal fiber is developed to stabilize a fiber laser to the 13 C…”
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Enhancement of the performance of a fiber-based frequency comb by referencing to an acetylene-stabilized fiber laser by Talvard, Thomas, Westergaard, Philip G, DePalatis, Michael V, Mortensen, Nicolai F, Drewsen, Michael, Gøth, Bjarke, Hald, Jan

“…We demonstrate a significant improvement in the performance of a fiber-based frequency comb when a GPS-disciplined Rb clock is replaced with an…”
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Cavity-enhanced sum-frequency generation of blue light with near-unity conversion efficiency by Kerdoncuff, Hugo, Christensen, Jesper B, Brasil, Túlio B, Novikov, Valeriy A, Polzik, Eugene S, Hald, Jan, Lassen, Mikael

“…We report on double-resonant highly efficient sum-frequency generation in the blue range. The system consists of a 10-mm-long periodically poled KTP crystal…”
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Saturated optical absorption by slow molecules in hollow-core photonic band-gap fibers by Hald, Jan, Petersen, Jan C, Henningsen, Jes

“…We report on saturated absorption in a hollow-core photonic band-gap fiber filled with 12C2H2 molecules. We find that slow molecules provide a major…”
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Optical frequency standard using acetylene-filled hollow-core photonic crystal fibers by Triches, Marco, Michieletto, Mattia, Hald, Jan, Lyngsø, Jens K, Lægsgaard, Jesper, Bang, Ole

“…Gas-filled hollow-core photonic crystal fibers are used to stabilize a fiber laser to the 13C2H2 P(16) (ν1+ν3) transition at 1542 nm using saturated…”
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Fiber laser optical frequency standard at 1.54 μm by Hald, Jan, Nielsen, Lars, Petersen, Jan C, Varming, Poul, Pedersen, Jens E

“…A 32 mW fiber laser is stabilized to the (13)C(2)H(2) P(16) (ν1 + ν3) transition at 1542 nm using saturated absorption. The short-term shot-noise limited…”
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Interference Cancellation for Hollow-Core Fiber Reference Cells by Seppa, Jeremias, Merimaa, Mikko, Manninen, Albert, Triches, Marco, Hald, Jan, Lassila, Antti

“…Doppler-free saturated absorption spectroscopy of gases in hollow-core fiber (HCF)-based cells can be used for realizing new compact, robust, and portable…”
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Compact, CO2-stabilized tuneable laser at 2.05 microns by Westergaard, Philip G, Thomsen, Jan W, Henriksen, Martin R, Michieletto, Mattia, Triches, Marco, Lyngsø, Jens K, Hald, Jan

“…We demonstrate a compact fibre-based laser system at 2.05 microns stabilized to a CO2 transition using frequency modulation spectroscopy of a gas-filled…”
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Microwave optical double resonance spectroscopy of ammonia in a hollow-core fiber by Petersen, Jan C, Hald, Jan

“…We have demonstrated microwave optical double resonance spectroscopy of the nu(1) + nu(3) and nu(1) + 2nu(4) bands of ammonia in a hollow-core photonic bandgap…”
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Compact, CO 2 -stabilized tuneable laser at 2.05 microns by Westergaard, Philip G, Thomsen, Jan W, Henriksen, Martin R, Michieletto, Mattia, Triches, Marco, Lyngsø, Jens K, Hald, Jan

“…We demonstrate a compact fibre-based laser system at 2.05 microns stabilized to a CO transition using frequency modulation spectroscopy of a gas-filled…”
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Fiber-based portable optical frequency standard for telecommunication by Triches, Marco, Brusch, Anders, Hald, Jan, Laegsgaard, Jesper, Bang, Ole

“…Gas-filled hollow-core photonic crystal fibers are used to stabilize a fiber laser to the 13 C 2 H2 P(16) (V 1 + V 3 ) transition at 1542 nm using saturated…”
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An Acetylene-Based Optical Clock with Fractional Frequency Instability by Droste, Stefan, Attar, Andrew, Timmers, Henry, Phillips, Nate, Smith, Cole, Hald, Jan, Kjaer, Michael, Sodergren, Bennett, Vogel, Kurt, Knabe, Kevin

“…We demonstrate an acetylene-based optical clock that achieves < 3\times 10^{-13}/\sqrt{\tau} fractional frequency instability and a flicker floor below 10 −14…”
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Cavity-enhanced sum-frequency generation of blue light with near-unity conversion efficiency by Kerdoncuff, Hugo, Christensen, Jesper B, Brasil, Túlio B, Novikov, Valeriy A, Polzik, Eugene S, Hald, Jan, Lassen, Mikael

“…Opt. Express 28, 3975-3984 (2020) We report on double-resonant highly efficient sum-frequency generation in the blue range. The system consists of a 10-mm-long…”
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Double-Resonant Sum-Frequency Generation of Blue Light with Near-Unity Quantum Conversion Efficiency by Kerdoncuff, Hugo, Christensen, Jesper B., Brasil, Tulio B., Novikov, Valeriy A., Polzik, Eugene, Hald, Jan, Lassen, Mikael

“…We demonstrate double-resonant sum-frequency generation of coherent blue light in a bow-tie cavity with record high quantum conversion efficiency of 95% of…”
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Compact, CO2-stabilized tuneable laser at 2.05 microns by Westergaard, Philip G, Thomsen, Jan W, Henriksen, Martin R, Michieletto, Mattia, Triches, Marco, Lyngsø, Jens K, Hald, Jan

“…Optics Express Vol. 24, Issue 5, pp. 4872-4880 (2016) We demonstrate a compact fibre-based laser system at 2.05 microns stabilized to a CO2 transition using…”
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Frequency and wavelength standards based on gas filled HC-PBFs by Petersen, J.C., Hald, J.

“…We demonstrate the observation of saturated absorption in several molecules in HC-PBFs. Characteristics of these molecular reference lines are discussed and…”
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A spectroscopic determination of the Boltzmann constant by Hald, J., Nielsen, L., Petersen, J.C.

“…A new determination of the Boltzmann constant (k B ) is conducted using a spectroscopic measurement, through the collaboration of various metrological…”
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