All-solid-state sub-40-fs self-starting Cr4+:forsterite laser with holey-fiber beam delivery and chirp control for coherence-domain and nonlinear-optical biomedical applications

A. A. Ivanov; Michael V. Alfimov; Andrei B. Fedotov; A. A. Podshivalov; Dusan Chorvat; Alexei M. Zheltikov

doi:10.1117/12.431561

4 May 2001 All-solid-state sub-40-fs self-starting Cr⁴⁺:forsterite laser with holey-fiber beam delivery and chirp control for coherence-domain and nonlinear-optical biomedical applications

A. A. Ivanov, Michael V. Alfimov, Andrei B. Fedotov, A. A. Podshivalov, Dusan Chorvat, Alexei M. Zheltikov

Author Affiliations +

Proceedings Volume 4241, Saratov Fall Meeting 2000: Optical Technologies in Biophysics and Medicine II; (2001) https://doi.org/10.1117/12.431561
Event: Saratov Fall Meeting 2000, 2001, Saratov, Russian Federation

Abstract

An all-solid-state sub-40-fs self-starting Cr⁴⁺:forsterite laser with a wavelength tunable within the range of 1.21-1.29 micrometers adapted in its power, temporal, and spectral parameters for high-resolution optical coherence tomography (OCT) and nonlinear optical tissue imaging is presented. Stable self-starting mode locking in the created laser is achieved both with and without semiconductor saturable-absorber mirrors, while the double-pulse regime of lasing permits time-resolved measurements on biological systems to be performed. Frequency doubling is implemented through second harmonic generation in a 2.5-mm-long DCDA crystal, ensuring group velocity matching for femtosecond pulses produced by the Cr:forsterite laser. A set of holey fibers with a period of the photonic crystal structure of the cladding ranging from 468 nm to 32 micrometers ensure the tunability of the photonic band gap of the cladding within a broad spectral range, providing different waveguiding regimes for Cr⁴⁺:forsterite laser radiation.

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A. A. Ivanov, Michael V. Alfimov, Andrei B. Fedotov, A. A. Podshivalov, Dusan Chorvat, and Alexei M. Zheltikov "All-solid-state sub-40-fs self-starting Cr⁴⁺:forsterite laser with holey-fiber beam delivery and chirp control for coherence-domain and nonlinear-optical biomedical applications", Proc. SPIE 4241, Saratov Fall Meeting 2000: Optical Technologies in Biophysics and Medicine II, (4 May 2001); https://doi.org/10.1117/12.431561

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