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Proceedings Paper

GHz repetition-rate femtosecond sources with desired repetition-rate and wavelength
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Paper Abstract

In this talk, we will review our recent works about the GHz-repetition-rate (GRR) femtosecond lasers. These works make GRR femtosecond lasers more flexible in the manipulation of pulse repetition-rate and the operating wavelength. We first demonstrate a phase insensitive way to multiply the repetition-rate of a passive mode-locked laser in femtosecond regime. By inserting an intracavity flat surface with low reflectivity, we multiplied the repetition-rate of a femtosecond Cr:forsterite laser by ten times. It provides a simple and stable way to modify MHz-repetition-rate femtosecond lasers into GRR lasers. To achieve desired wavelength, which can't be directly generated by a gain medium, nonlinear conversion is required. But for GRR femtosecond lasers, the efficiency of single-pass conversion is low due to its low pulse energy. In order to increase the yield, we adopt the method of resonant-enhanced external cavity. With a resonant cavity matched to a 2-GHz repetition-rate Ti:sapphire laser, we demonstrated a high power femtosecond blue source at 2-GHz repetition-rate.

Paper Details

Date Published: 15 February 2006
PDF: 10 pages
Proc. SPIE 6118, Ultrafast Phenomena in Semiconductors and Nanostructure Materials X, 61180A (15 February 2006); doi: 10.1117/12.644048
Show Author Affiliations
Tzu-Ming Liu, National Taiwan Univ. (Taiwan)
Cheng-Ta Yu, National Taiwan Univ. (Taiwan)
Chi-Kuang Sun, National Taiwan Univ. (Taiwan)
Franz X. Kärtner, Massachusetts Institute of Technology (United States)
James G. Fujimoto, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 6118:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials X
Kong-Thon Tsen; Jin-Joo Song; Hongxing Jiang, Editor(s)

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