1. Femtosecond pulse amplification on a chip
- Author
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Gaafar, Mahmoud A., Ludwig, Markus, Wang, Kai, Wildi, Thibault, Voumard, Thibault, Sinobad, Milan, Lorenzen, Jan, Francis, Henry, Zhang, Shuangyou, Bi, Toby, DeľHaye, Pascal, Geiselmann, Michael, Singh, Neetesh, Kärtner, Franz X., Garcia-Blanco, Sonia M., and Herr, Tobias
- Subjects
Physics - Optics - Abstract
Femtosecond laser pulses enable the synthesis of light across the electromagnetic spectrum and provide access to ultrafast phenomena in physics, biology, and chemistry. Chip-integration of femtosecond technology could revolutionize applications such as point-of-care diagnostics, bio-medical imaging, portable chemical sensing, or autonomous navigation. However, current chip-integrated pulse sources lack the required peak power and on-chip amplification of femtosecond pulses has been an unresolved challenge. Here, addressing this challenge, we report >50-fold amplification of 1 GHz-repetition-rate chirped femtosecond pulses in a CMOS-compatible photonic chip to 800 W peak power with 116 fs pulse duration. This power level is 2-3 orders of magnitude higher compared to those in previously demonstrated on-chip pulse sources and can provide the power needed to address key applications. To achieve this, detrimental nonlinear effects are mitigated through all-normal dispersion, large mode-area and rare-earth-doped gain waveguides. These results offer a pathway to chip-integrated femtosecond technology with peak power-levels characteristic of table-top sources., Comment: 15 pages, 7 figures
- Published
- 2023