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Infrared Lasers
In article number 1700273, Jinwei Zhang and co‐workers investigate two different gain materials—Tm:YAG and Ho:YAG—in thin‐disk configuration. Using a 72‐pass pump cavity, thin‐disk lasers with high powers and optical‐to‐optical efficiencies at 2 µm are realized, paving the way for further scaling of power towards kW‐level based on thin‐disk technology. The image was made and processed...
Continuous‐wave Tm:YAG and Ho:YAG thin‐disk lasers with maximum optical‐to‐optical efficiencies of 41% and 58% respectively are presented. Pumped by a 780 nm laser diode, the Tm:YAG laser generated a maximum output power of 24 W. In comparison, the Ho:YAG laser, pumped by a fiber laser at 1908 nm, delivered a maximum output power of 50 W. The reported output powers are, to the best of our knowledge,...
We report the first mode-locked Ho:YAG thin-disk oscillator delivering 220 fs pulses at 20 W average power and 2090 nm central wavelength. The output parameters constitute the highest average power of any mode-locked oscillator around 2 μm.
High peak power, few cycle pulses at 2 um are highly sought after for their ability to generate ultrabroad, passively CEP stabilized continua in the mid-infrared (IR) [1] using highly nonlinear non-oxide crystals, which promises numerous applications in physics, environmental and life sciences. Recently, a Kerr-lens mode-locked Ho:YAG thin disk (based on TRUMPF technology) oscillator has directly...
High power ultrafast laser sources at 2 μm are highly desirable as primary sources in many fields such as mid-IR generation, remote sensing, Lidar systems, and medical use. Ho:YAG is an excellent gain crystal for such kind of sources due to its low quantum defect, good crystal quality and broad emission bandwidth. To date, Ho:YAG has been utilized in q-switched and actively mode-locked systems [1,...
Two schemes for multi-μJ pulse compression in noble-gas-filled hollow-core kagomé-PCF are demonstrated and compared. A fiber-plus-chirped-mirror combination compresses 150 fs, 9.5 μJ pulses to 26 fs, and soliton-effect compression produces sub 7 fs pulses.
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