Remote characterization and delivery of dispersion-compensated ultrashort pulses over dynamic optical fiber links

Lakshmi C. G.; V. R. Supradeepa

doi:10.1117/12.2609739

4 March 2022 Remote characterization and delivery of dispersion-compensated ultrashort pulses over dynamic optical fiber links

Lakshmi C. G., V. R. Supradeepa

Author Affiliations +

Proceedings Volume 11991, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXII; 119910A (2022) https://doi.org/10.1117/12.2609739
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

Ultrashort optical pulses find uses in many areas such as multiphoton microscopy, spectroscopy, and material processing. These pulse sources are complex systems that are resource-intensive. This necessitates methods for the robust delivery of pulses to time-varying satellite locations. Characterization of the power spectrum and the temporal profile of the delivered pulses without the need for specialized equipment at the satellite location is highly desirable. Here, we demonstrate a simple method using a compact measurement apparatus at satellite locations with power detectors at the fundamental and second harmonic wavelengths (Germanium and Silicon detectors, respectively). The module also includes a thin β-Barium Borate crystal for second harmonic generation and a communication link to the source using standard data protocols. A pulse shaper at the source emulates an interferometer by creating pulse pairs with varying time delays. At satellite locations, fundamental and SHG power measurements of the pulse pair provide the field autocorrelation function (Fourier transform of the power spectrum) and the intensity autocorrelation function, respectively. Transform-limited pulses can be delivered by compensating the measured dispersion dynamically using the pulse shaper. We have delivered sub-picosecond pulses from a C-band mode-locked fiber laser with a bandwidth of 20nm over 50 and 100m using existing telecom fiber links. The pulse widths and spectra obtained using the remote measurement matched with those made directly at the satellite location. This provides easy distribution and remote characterization for femtosecond lasers from a central location to various satellite locations.

Conference Presentation

Citation Download Citation

Lakshmi C. G. and V. R. Supradeepa "Remote characterization and delivery of dispersion-compensated ultrashort pulses over dynamic optical fiber links", Proc. SPIE 11991, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXII, 119910A (4 March 2022); https://doi.org/10.1117/12.2609739

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