activity
20232026
most citedUltraviolet astronomical spectrograph calibration with laser frequency combs from nanophotonic lithium niobate waveguides

31 citations · 32 across the 5 of their papers we have counts for

collaborators

5 papers

physics.optics2026

Backward-Wave Difference-Frequency Generation in Thin-Film Lithium Niobate

Yesim Koyaz, Ozan Yakar, Furkan Ayhan +3

Second-order nonlinear processes involving counter-propagating light generation have been explored for quantum applications and optical parametric oscillators. However, realizing t…

astro-ph.IM2026

Test of a 34 GHz EOM laser frequency comb at ESPRESSO

Tobias M. Schmidt, Ewelina Obrzud, François Bouchy +18

Laser frequency combs (LFCs) are a promising technology for wavelength calibration of astronomical high-resolution spectrographs requiring utmost accuracy and stability, since they…

physics.optics2025

Mid-infrared continua via spectral broadening and difference frequency generation in a nanophotonic lithium niobate waveguide

Markus Ludwig, Furkan Ayhan, Thibault Voumard +5

Periodically poled thin film lithium niobate waveguides provide simultaneous access to efficient second and third order nonlinear processes, enabling broadband generation of cohere…

physics.optics2025★ 1 cited

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…

physics.optics2023★ 31 cited

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…