Steve Lecomte
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View article: Fabrication-tolerant modal phase matching for all-optical frequency conversion in layer-poled thin film lithium niobate waveguide
Fabrication-tolerant modal phase matching for all-optical frequency conversion in layer-poled thin film lithium niobate waveguide Open
Thin film lithium niobate (TFLN) combines strong second-order nonlinearity with low propagation loss, making it an ideal platform for on-chip frequency conversion and quantum light generation. Frequency conversion is usually achieved by qu…
View article: Fabrication-tolerant frequency conversion in thin film lithium niobate waveguide with layer-poled modal phase matching
Fabrication-tolerant frequency conversion in thin film lithium niobate waveguide with layer-poled modal phase matching Open
Thanks to its high quadratic nonlinear susceptibilty and low propagation losses, thin film lithium niobate (TFLN) on insulator is an ideal platform for laser frequency conversion and generation of quantum states of light. Frequency convers…
View article: nAncestor: an artificial satellite-borne star for accurate frequency calibration of ground-based EPRV spectrographs
nAncestor: an artificial satellite-borne star for accurate frequency calibration of ground-based EPRV spectrographs Open
The accuracy of state-of-the-art Extreme Precision Radial Velocity (EPRV) spectrographs depends on the access to extremely precise and stable wavelength calibration sources. There are several available calibration sources (e.g., emission l…
View article: Dual optical frequency transfer through wavelength-division and polarization multiplexing in an 184-meter fiber link
Dual optical frequency transfer through wavelength-division and polarization multiplexing in an 184-meter fiber link Open
Stabilized dual optical frequency transfer is demonstrated through wavelength-division or polarization multiplexing in a 184-meter long polarization-maintaining fiber link. The latter is stabilized at a primary frequency in the telecom C-b…
View article: Towards space-deployable laser stabilization systems based on vibration-insensitive cubic cavities with crystalline coatings
Towards space-deployable laser stabilization systems based on vibration-insensitive cubic cavities with crystalline coatings Open
We present the development of a transportable laser frequency stabilization system with application to both optical clocks and a next-generation gravity mission (NGGM) in space. This effort leverages a 5-cm long cubic cavity with crystalli…
View article: An Artificial Neural Network to Eliminate the Detrimental Spectral Shift on Mid-Infrared Gas Spectroscopy
An Artificial Neural Network to Eliminate the Detrimental Spectral Shift on Mid-Infrared Gas Spectroscopy Open
We demonstrate the successful implementation of an artificial neural network (ANN) to eliminate detrimental spectral shifts imposed in the measurement of laser absorption spectrometers (LASs). Since LASs rely on the analysis of the spectra…
View article: ADVANCED DIGITAL TECHNOLOGIES IN LIFE SCIENCES: PHOTONICS AND BEYOND
ADVANCED DIGITAL TECHNOLOGIES IN LIFE SCIENCES: PHOTONICS AND BEYOND Open
CSEM technologies aim to improve the quality of life of patients and make new treatments accessible for all. Life sciences companies’ central role in drug pricing and access to medicines puts them on the frontline of societal challenges li…
View article: STE-QUEST -- Space Time Explorer and QUantum Equivalence principle Space Test: The 2022 medium-class mission concept
STE-QUEST -- Space Time Explorer and QUantum Equivalence principle Space Test: The 2022 medium-class mission concept Open
Space-borne quantum technologies, particularly those based on atom interferometry, are heralding a new era of strategic and robust space exploration. The unique conditions of space, characterized by low noise and low gravity environments, …
View article: Digital OPLL-based distributed Brillouin sensing system in optical fibers
Digital OPLL-based distributed Brillouin sensing system in optical fibers Open
A digital optical phase-locked loop (OPLL) has been implemented to develop a distributed Brillouin sensing system in optical fibers. In our experiment, two commercial semiconductor lasers are phase-locked to each other with a highly flexib…
View article: Stable and compact RF-to-optical link using lithium niobate on insulator waveguides
Stable and compact RF-to-optical link using lithium niobate on insulator waveguides Open
Optical frequency combs have become a very powerful tool in metrology and beyond, thanks to their ability to link radio frequencies with optical frequencies via a process known as self-referencing. Typical self-referencing is accomplished …
View article: Stable and compact RF-to-optical link using lithium niobate on insulator waveguides
Stable and compact RF-to-optical link using lithium niobate on insulator waveguides Open
Stable and compact RF-to-optical link using lithium niobate on insulator waveguides Optical frequency combs have become a very powerful tool in metrology and beyond thanks to their ability to link radio frequencies with optical frequencies…
View article: Stable and compact RF-to-optical link using lithium niobate on insulator waveguides
Stable and compact RF-to-optical link using lithium niobate on insulator waveguides Open
Stable and compact RF-to-optical link using lithium niobate on insulator waveguides Optical frequency combs have become a very powerful tool in metrology and beyond thanks to their ability to link radio frequencies with optical frequencies…
View article: Photonics-based ultra-low phase noise X-band microwave generation
Photonics-based ultra-low phase noise X-band microwave generation Open
Mode-locked lasers, and in particular solid-state femtosecond lasers, are oscillators with a unique physics capable to exhibit extremely low-phase noise of the emitted pulse train. Here we report ultra-low phase noise microwave generation …
View article: High-power photoreceivers for large dynamic range: high frequency photonic RF links
High-power photoreceivers for large dynamic range: high frequency photonic RF links Open
This contribution summarizes the status of our current development of a novel, high-power and high-linearity photodiode. This photodiode is specifically designed to operate over an exceptionally wide optical input power range from below - …
View article: Exploring the foundations of the physical universe with space tests of the equivalence principle
Exploring the foundations of the physical universe with space tests of the equivalence principle Open
We present the scientific motivation for future space tests of the equivalence principle, and in particular the universality of free fall, at the 10 − 17 level or better. Two possible mission scenarios, one based on quantum technologies, t…
View article: Ultra-broadband infrared gas sensor for pollution detection: the TRIAGE project
Ultra-broadband infrared gas sensor for pollution detection: the TRIAGE project Open
Air pollution is one of the largest risk factors for disease or premature death globally, yet current portable monitoring technology cannot provide adequate protection at a local community level. Within the TRIAGE project, a smart, compact…
View article: Airborne campaign results of a compact 2-4um broadband supercontinuum-based spectrometer system for multi-species atmospheric gas analysis at ppm level
Airborne campaign results of a compact 2-4um broadband supercontinuum-based spectrometer system for multi-species atmospheric gas analysis at ppm level Open
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View article: Nonlinear filtering of an optical pulse train using dissipative Kerr solitons
Nonlinear filtering of an optical pulse train using dissipative Kerr solitons Open
The capability to store light for extended periods of time enables optical cavities to act as narrow-band optical filters, whose linewidth corresponds to the cavity's inverse energy storage time. Here, we report on nonlinear filtering of a…
View article: Nonlinear filtering of an optical pulse train using dissipative Kerr\n solitons
Nonlinear filtering of an optical pulse train using dissipative Kerr\n solitons Open
The capability to store light for extended periods of time enables optical cavities to act as narrow-band optical filters, whose linewidth corresponds to the cavity's inverse energy storage time. Here, we report on nonlinear filtering of a…
View article: LISA laser system and European development strategy
LISA laser system and European development strategy Open
The Laser Interferometer Space Antenna (LISA), with its extreme distance measurement requirements (pm over arm lengths of 2.5 million km), imposes many stringent requirements on the laser systems used for the distance metrological measurem…
View article: Exploring the Foundations of the Universe with Space Tests of the Equivalence Principle
Exploring the Foundations of the Universe with Space Tests of the Equivalence Principle Open
We present the scientific motivation for future space tests of the\nequivalence principle, and in particular the universality of free fall, at the\n$10^{-17}$ level or better. Two possible mission scenarios, one based on\nquantum technolog…
View article: Broadband Efficient Soliton Microcombs in Pulse-Driven Photonic Microresonators
Broadband Efficient Soliton Microcombs in Pulse-Driven Photonic Microresonators Open
Broadband single-soliton based frequency combs, with a detectable repetition rate of 28 GHz, are efficiently generated through pulse-driving of a chip-based Si3N4 microresonator. We observe an influence of the pulse-driving rate on the com…
View article: Broadband near-infrared astronomical spectrometer calibration and on-sky validation with an electro-optic laser frequency comb
Broadband near-infrared astronomical spectrometer calibration and on-sky validation with an electro-optic laser frequency comb Open
The quest for extrasolar planets and their characterization as well as studies of fundamental physics on cosmological scales rely on capabilities of high-resolution astronomical spectroscopy. A central requirement is a precise wavelength c…
View article: Frequency comb up- and down-conversion in synchronously driven χ<sup>(2)</sup> optical microresonators
Frequency comb up- and down-conversion in synchronously driven χ<sup>(2)</sup> optical microresonators Open
Optical frequency combs are key to optical precision measurements. While most frequency combs operate in the near-infrared (NIR) regime, many applications require combs at mid-infrared (MIR), visible (VIS), or even ultra-violet (UV) wavele…
View article: A Microphotonic Astrocomb
A Microphotonic Astrocomb Open
One of the essential prerequisites for detection of Earth-like extra-solar planets or direct measurements of the cosmological expansion is the accurate and precise wavelength calibration of astronomical spectrometers. It has already been r…
View article: Performance demonstration of a single-frequency optically-pumped cesium beam frequency standard for space applications
Performance demonstration of a single-frequency optically-pumped cesium beam frequency standard for space applications Open
Observatoire de Neuchâtel (ON) is developing a compact optically-pumped cesium beam frequency standard in the frame of an ESA-ARTES 5 project. The simplest optical scheme, which is based on a single optical frequency for both preparation a…
View article: High speed, high frequency electro-photonic ADC for space enabled routers and flexible antennas
High speed, high frequency electro-photonic ADC for space enabled routers and flexible antennas Open
The trend in future telecom satellites is to employ increasingly powerful digital payloads for antenna beam forming and switching.