It is already five years that I blogged nothing here. Just give a short outlines here to show the main research achievements.
We have improved and maturized the Raman fiber amplifier based guide star lasers. The laser can now operate at CW, 100 microsecond quasi-CW, and pulsed at Larmor frequency. Laser prototypes were tested at telescopes for sodium guide star, and also for mesospheric magnetometry.
With cascaded random Raman fiber laser, we have demonstrated up to 11 th Raman Stokes light generation. With a Yb pump laser at 1 micron, continuous wavelength tuning up to 2 micron were demonstrated. With this technology, fiber lasers can now output more than 100 W at any wavelength from 1030 nm to 2000 nm.
We continued our study on mode locked Raman fiber lasers, have made some interesting demonstrations including NPR mode locked dissipative soliton, figure of 8 dissipative soliton, rectangular pulse generation etc. We believe we have improved the understanding of mode locked Raman fiber lasers now.
Amplified spontanesou emission sources were found to be useful for pumping cascaded random Raman fiber lasers and mode locked Raman fiber lasers.
Specialty lasers at various wavelengths were demonstrated with wavelength tuning of fiber lasers and second harmonic generations.
Besides, we have made contributions in scattered topics. Many of them are actually more interesting and look for futher developments. Check out our publication list.