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Proceedings Paper

Single-shot spectroscopy of broadband Yb fiber laser
Author(s): Masayuki Suzuki; Shin Yoneya; Hiroto Kuroda
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Paper Abstract

We have experimentally reported on a real-time single-shot spectroscopy of a broadband Yb-doped fiber (YDF) laser which based on a nonlinear polarization evolution by using a time-stretched dispersive Fourier transformation technique. We have measured an 8000 consecutive single-shot spectra of mode locking and noise-like pulse (NLP), because our developed broadband YDF oscillator can individually operate the mode locking and NLP by controlling a pump LD power and angle of waveplates. A shot-to-shot spectral fluctuation was observed in NLP. For the investigation of pulse formation dynamics, we have measured the spectral evolution in an initial fluctuations of mode locked broadband YDF laser at an intracavity dispersion of 1500 and 6200 fs2 for the first time. In both case, a build-up time between cw and steady-state mode locking was estimated to be 50 us, the dynamics of spectral evolution between cw and mode locking, however, was completely different. A shot-to-shot strong spectral fluctuation, as can be seen in NLP spectra, was observed in the initial timescale of 20 us at the intracavity dispersion of 1500 fs2. These new findings would impact on understanding the birth of the broadband spectral formation in fiber laser oscillator.

Paper Details

Date Published: 22 February 2017
PDF: 6 pages
Proc. SPIE 10089, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications II, 1008905 (22 February 2017); doi: 10.1117/12.2255945
Show Author Affiliations
Masayuki Suzuki, Aichi Medical Univ. (Japan)
Shin Yoneya, Aichi Medical Univ. (Japan)
Hiroto Kuroda, Aichi Medical Univ. (Japan)

Published in SPIE Proceedings Vol. 10089:
Real-time Measurements, Rogue Phenomena, and Single-Shot Applications II
Bahram Jalali; Daniel R. Solli; Sergei K. Turitsyn; Günter Steinmeyer; Neil G. R. Broderick, Editor(s)

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