3 papers
physics.optics2024
Chirped pulse waveguide amplifier
Alexander Rudenkov, Vladimir L. Kalashnikov, Maxim Demesh +3
We introduce a single-mode Cr:ZnS crystalline waveguide ultrafast amplifier that provides a high gain of 5.5 dB/cm and 2.35 W of average output power. The depressed-cladding buried…
physics.optics2022
Femtosecond laser writing of the depressed cladding buried channel waveguides in ZnS crystal
E. Sorokin, A. Okhrimchuk, N. Tolstik +4
We report the first direct femtosecond laser-writing of buried channel waveguides in monocrystalline ZnS. We also report the first single-mode Cr:ZnS depressed cladding buried wave…
physics.optics2019
Sub-surface modifications in silicon with ultrashort pulsed lasers above 2 microns
Roland A. Richter, Nikolai Tolstik, Sebastien Rigaud +7
Nonlinear optical phenomena in silicon such as self-focusing and multi-photon absorption are strongly dependent on the wavelength, energy and duration of the exciting pulse. Thus,…