We present an environmentally stable Yb ultrafast ring oscillator utilizing a new method of passive mode-locking. The laser is using all-fiber architecture which makes it insensitive to environmental factors, like temperature, humidity, vibrations, and shocks. The new method of mode-locking is utilizing crossed bandpass transmittance filters in ring architecture to discriminate against CW lasing. Broadband pulse evolves from cavity noise under amplification, after passing each filter, causing strong spectral broadening. The laser is self-starting. It generates transform limited spectrally flat pulses of 1 – 50 nm width at 6 – 15 MHz repetition rate and pulse energy 0.2 – 15 nJ at 1010 – 1080 nm CWL.
Igor Samartsev, Andrey Bordenyuk, and Valentin Gapontsev, "Environmentally stable seed source for high power ultrafast laser," Proc. SPIE 10085, Components and Packaging for Laser Systems III, 100850S (Presented at SPIE LASE: February 02, 2017; Published: 22 February 2017); https://doi.org/10.1117/12.2250641.
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