Browsing by Research Areas "Photonics"
Now showing items 1-20 of 236
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1/f noise in external-cavity InGaN diode laser at 420  nm wavelength for atomic spectroscopy
(2014-03-15)We have extensively studied the frequency noise and relative intensity noise spectra in a tunable external-cavity InGaN diode laser at blue (420 nm) wavelengths. We report flicker (1/f) frequency-noise behavior at low ... -
2016_Kjelberg_Thermo-Mechanical Design.pdf
(2016-09-05) -
9.6 GHz ultra-low phase noise signal generation from a diode-pumped solid-state laser
(2015-10)We present ultra-low phase noise microwave generation based on a photonics oscillator. By using an ultra-narrow linewidth continuous-wave laser stabilized on a high-finesse optical cavity as a frequency reference, an optical ... -
A Kerr polarization controller
(2022-01-19)Kerr-effect-induced changes of the polarization state of light are well known in pulsed laser systems. An example is nonlinear polarization rotation, which is critical to the operation of many types of mode-locked lasers. ... -
A microphotonic astrocomb
(2019-01)A microphotonic astrocomb is demonstrated via temporal dissipative Kerr solitons in photonic-chip-based silicon nitride microresonators with a precision of 25?cm?s–1 (radial velocity equivalent), useful for Earth-like ... -
A Photothermal Spectrometer for Fast and Background-Free Detection of Individual Nanoparticles in Flow
(2017)Sensitive detection and quantification of individual plasmonic nanoparticles is critical in a range of applications in the biological, nanomaterials, and analytical sciences. Although a wide range of techniques can be ... -
Absorption spectroscopy of 85Rb atoms at 420 nm: Pressure broadening with N2 buffer gas and saturation intensity
(2014-06)We experimentally measure the pressure broadening coefficient of absorption linewidth in the 85Rb 52S1/2-62P3/2 transition (420 nm wavelength) due to collisions with N2 buffer gas. In addition, we measure the saturation ... -
ADVANCED DIGITAL TECHNOLOGIES IN LIFE SCIENCES: PHOTONICS AND BEYOND
(2022-12-13)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 ... -
AI-enabled real-time dual-comb molecular fingerprint imaging
(2020-12-15)Hyperspectral imaging provides spatially resolved spectral information. Utilizing dual-frequency combs as active illumination sources, hyperspectral imaging with ultra-high spectral resolution can be implemented in a ... -
Altimetry, Imaging and Landing Location Selection Lidars for ESA Space Applications
(2019-07-28)Following the successful launch of ADM-Aeolus as well as BepiColombo, European Space Agency has developed the last years a large number of Lidar instrument breadboards to cover a variety of space mission requirements, such ... -
Analytical expression for Risken-Nummedal-Graham-Haken instability threshold in quantum cascade lasers
(2016-11-14)We have obtained a closed-form expression for the threshold of Risken-Nummedal-Graham-Haken (RNGH) multimode instability in a Fabry-Pérot (FP) cavity quantum cascade laser (QCL). This simple analytical expression ... -
Astrocombs: Recent Advances
(2019-12-01)Precision calibration of astronomical spectrographs is essential to the hunt for exoplanets, the study of cosmology and determining variation of the fundamental constants. Frequency combs (‘astrocombs’) can serve as ... -
Blue iridium complexes as electron trapping sites and efficient recombination centres in poly(N-vinylcarbazole) seen by spectrally resolved thermoluminescence
(2016)Spectrally resolved thermoluminescence (SRTL) of poly(N-vinylcarbazole) (PVK) doped with blue iridium (III) complexes: bis(4,6-difluorophenyI)-pyridinato-N,C-2)(picolinate) (FIrpic) or tris[2-(2,4-difluorophenyl)pyridine] ... -
Broadband Efficient Soliton Microcombs in Pulse-Driven Photonic Microresonators
(2019-05-05)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 ...