Papers by Tobias Kippenberg
Advanced Solid-State Lasers Congress, 2013
ABSTRACT We observe the formation of single temporal soliton states, which leads to an outcoupled... more ABSTRACT We observe the formation of single temporal soliton states, which leads to an outcoupled pulse-train that corresponds to low noise optical frequency comb. Pulse durations below 200fs are observed.
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Nonlinear Optics: Materials, Fundamentals and Applications, 2004
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Phys Rev a, 2011
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Summaries of Papers Presented at the Lasers and Electro-Optics. CLEO '02. Technical Diges, 2002
Summary form only given. We investigated the modification of external coupling properties in the ... more Summary form only given. We investigated the modification of external coupling properties in the presence of modal coupling using high-Q silica microspheres coupled to fiber-tapers. The long photon lifetime of high-Q microresonators makes possible a counter-intuitive effect where minute scattering gives rise to the regime of strong modal coupling. In this regime, scattering into the oppositely oriented mode is the dominant scattering process. We demonstrate that it is possible to experimentally obtain extremely large modal coupling, while maintaining quality factors of 108. Normalized modal splitting ratios as large as 30 were observed.
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2005 Quantum Electronics and Laser Science Conference, 2005
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A silica microcavity is shown to allow both circulation of long lived cavity photons as well as m... more A silica microcavity is shown to allow both circulation of long lived cavity photons as well as mechanical vibrations at characteristic radio frequencies. Radiation pressure or the force due to impact of photons can couple the mechanical modes of an optical cavity structure to its optical modes, leading to regenerative RF mechanical oscillations of the micro structure with only micro-Watts of optical threshold power. Embodied within a microscale, chip-based device, this mechanism can benefit both research into macroscale quantum mechanical phenomena and improve the understanding of the mechanism within the context of Laser interferometer gravitational-wave observatory (LIGO). This novel class of oscillators that acquire gain directly from CW optical fields may also find applications in all-optical photonic systems. Through a detailed study of the short-term stability of these optomechanical oscillators we demonstrate that thermo-mechanical noise also referred to as Brownian noise, i...
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We describe a monolithic frequency comb generator. Using four-wave mixing enhanced by the high-Q ... more We describe a monolithic frequency comb generator. Using four-wave mixing enhanced by the high-Q optical modes of a microresonator, a continuous wave laser is converted into an optical frequency comb, whose equidistant mode spacing is verified to a precision better than 1 part in 1017. Balance of geometric and material dispersion allows to flatten dispersion and to create combs spanning 500 nm in the 1550 nm band. Moreover, scaling of this approach to microwave repetition rates is described.© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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The mid-infrared (mid-IR) regime (typically the wavelength regime of $\lambda \sim 2.5-20 \ \math... more The mid-infrared (mid-IR) regime (typically the wavelength regime of $\lambda \sim 2.5-20 \ \mathrm{\mu m}$) is an important spectral range for spectroscopy as many molecules have their fundamental rotational-vibrational absorption in this band. Recently optical frequency combs based on optical microresonators ("Kerr" combs) at the onset of the mid-IR region have been generated using crystalline resonators and integrated planar silicon micro-resonators. Here we extend for the first time Kerr combs deep into the mid-IR i.e. the 'molecular fingerprint' region. This is achieved by combining an ultra high quality (Q) factor mid-IR microresonator based on crystalline $\mathrm{MgF_{2}}$ with the quantum cascade laser (QCL) technology. Using a tapered chalgogenide (ChG) fiber and a QCL continuous wave pump laser, frequency combs at $\lambda\sim 4.4\ \mathrm{\mu m}$ (i.e. 2270cm$^{-1}$) are generated, that span over 600nm (i.e. 300cm$^{-1}$) in bandwidth, with a mode spaci...
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Nonlinear Optics, 2015
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Papers by Tobias Kippenberg