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15 February 2006 GHz repetition-rate femtosecond sources with desired repetition-rate and wavelength
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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.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tzu-Ming Liu, Cheng-Ta Yu, Chi-Kuang Sun, Franz X. Kärtner, and James G. Fujimoto "GHz repetition-rate femtosecond sources with desired repetition-rate and wavelength", Proc. SPIE 6118, Ultrafast Phenomena in Semiconductors and Nanostructure Materials X, 61180A (15 February 2006); https://doi.org/10.1117/12.644048
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