Vorsitzende der Sitzung
SSL 7 Tm, Ho Lasers
- Uwe Griebner (Max Born Institute, Berlin, Germany)
Präsentationsmaterialien
The development of optical frequency combs, and notably self-referencing, has revolutionized precision measurements over the past decade, and enabled counting of the cycles of light. Frequency combs, have enabled dramatic advances in timekeeping, metrology and spectroscopy.
We report on a mid-infrared thulium laser operating on the 3H4 → 3H5 transition with a dual-wavelength pumping at 0.78 and 1.05 µm (direct and upconversion pumping schemes). The reciprocal interplay between the two pump is studied to evaluate the benefits in terms of the pump absorption and laser efficiency.
In the present work, we explored further reduction of the pulse duration in ML Tm,Ho:CALGO laser via soft-aperture Kerr-lens mode-locking (KLM).Pulses as short as 37 fs were generated from KLM Tm,Ho:CALGO laser at 2061.3 nm with an average output power of 55 mW and a repetition rate of 76 MHz.
We report our recent progress in power-scaling of short-wave infrared laser systems by demonstrating high-power SESAM-modelocked thin-disk Ho:YAG oscillator, delivering record average power of 50 W and more than 2 µJ of pulse energy at the central wavelength of 2092 nm.
We report on a SESAM mode-locked Tm:(Lu,Sc)2O3 ceramic laser in-band pumped by a Raman fiber laser at 1627 nm.An average output power up to 1.02 W at 2060 nm is achieved for transform-limited 280-fs pulses at a repetition rate of 86.5 MHz, giving an optical efficiency of 36.4%.
We have demonstrated an incoherent source centred at 2100nm with a bandwidth of 300nm. It is three times brighter spectrally than a blackbody and 10 times brighter than SWIR LEDs. This source consists of a cascade of luminescent concentrators with a Ce:YAG in first and a CTH:YAG in second.
In this work we present a highly accurate model for simulating laser resonators based on a beam propagation method algorithm including thermal effects in the laser. An experimental Ho3+:YAG resonator setup is used to validate the model, which shows excellent agreement in output power, resulting M2 and output field distribution.
