36 citations · 156 across the 10 of their papers we have counts for
13 papers
Asynchronous Terahertz-field sampling with soliton microcombs
Alexandra Sakharova, Alexander E. Ulanov, Konstantin Wenzel +6
Terahertz time-domain spectroscopy records the electric field of terahertz transients and underpins applications from materials science to non-destructive testing. Asynchronous opt…
-2 self-referencing for silicon nitride photonics via a heterogeneously integrated lithium niobate layer
Weichen Fan, Bastian Ruhnke, Camiel Op de Beeck +4
Heterogeneous integration combines complementary material properties in a single photonic platform. Here, we demonstrate on-chip -2 self-referencing in a heterogeneously inte…
Bright solitons in hybrid-dispersion photonic crystal microresonators
Alexander E. Ulanov, Lukas Bengel, Bastian Ruhnke +2
Bright dissipative Kerr solitons in optical microresonators provide chip-scale sources of ultrashort pulses and frequency combs. Their properties are defined by the cavity dispersi…
Breaking the bandwidth-efficiency trade-off in soliton microcombs via mode coupling
Yang Liu, Andreas Jacobsen, Thibault Wildi +9
Dissipative Kerr solitons in optical microresonators have emerged as a powerful tool for compact and coherent frequency comb generation. Advances in nanofabrication have allowed pr…
Attosecond-level synchronisation of chip-integrated oscillators
Alexander E. Ulanov, Bastian Ruhnke, Theia El Sharkawy +4
Synchronised laser oscillators are essential for probing the fastest processes in chemistry, materials science, and biology down to atto-second timescales. Tight synchronisation is…
Spectral dynamics in broadband frequency combs with overlapping harmonics
Weichen Fan, Furkan Ayhan, Thibault Wildi +8
Optical frequency combs and their spectra of evenly spaced discrete laser lines are essential to modern time and frequency metrology. Recent advances in integrated photonic wavegui…
Quadrature squeezing in a nanophotonic microresonator
Alexander E. Ulanov, Bastian Ruhnke, Thibault Wildi +1
Squeezed states of light are essential for emerging quantum technology in metrology and information processing. Chip-integrated photonics offers a route to scalable and efficient s…
Laser diode self-injection locking to an integrated high-Q Fabry-Perot microresonator
Alexander E. Ulanov, Thibault Wildi, Utkarsh Bhatnagar +1
Self-injection locking (SIL) of laser diodes to microresonators is a powerful technique that enables compact narrow linewidth lasers. Here, we extend this technique to chip-integra…
Supercontinua from integrated gallium nitride waveguides
Weichen Fan, Markus Ludwig, Ian Rousseau +4
Supercontinua are broadband spectra that are essential to optical spectroscopy, sensing, imaging, and metrology. They are generated from ultrashort laser pulses through nonlinear f…
Phase-stabilised self-injection-locked microcomb
Thibault Wildi, Alexander E. Ulanov, Thibault Voumard +2
Microresonator frequency combs (microcombs) hold great potential for precision metrology within a compact form factor, impacting a wide range of applications such as point-of-care…
Femtosecond pulse amplification on a chip
Mahmoud A. Gaafar, Markus Ludwig, Kai Wang +13
Femtosecond laser pulses enable the synthesis of light across the electromagnetic spectrum and provide access to ultrafast phenomena in physics, biology, and chemistry. Chip-integr…
Ultraviolet astronomical spectrograph calibration with laser frequency combs from nanophotonic lithium niobate waveguides
Markus Ludwig, Furkan Ayhan, Tobias M. Schmidt +21
Astronomical precision spectroscopy underpins searches for life beyond Earth, direct observation of the expanding Universe and constraining the potential variability of physical co…
1 GHz dual-comb spectrometer for fast and broadband measurements
Thibault Voumard, John Darvill, Thibault Wildi +4
Dual-frequency comb spectroscopy permits broadband precision spectroscopic measurements with short acquisition time. A dramatic improvement of the maximal spectral bandwidth and th…