Diode-pumped mode-locked femtosecond 2-um Tm:CaYAlO4 laser

TL;DR

This paper reports the experimental demonstration of a stable, high-power femtosecond laser at 2 micrometers using a Tm:CaYAlO4 gain medium, achieving sub-picosecond pulses with significant output power.

Contribution

It introduces the use of Tm:CaYAlO4 as an effective gain medium for femtosecond lasers at 2 micrometers, demonstrating stable mode-locking and high output power.

Findings

Pulse duration of 496 fs achieved

Average output power of 531 mW

Repetition rate of 97 MHz

Abstract

Continuous-wave mode-locked femtosecond 2 um solid-state laser with a c-cut Tm:CaYAlO4 as gain medium was experimentally demonstrated. The mode locked laser generated stable pulses with average output power as high as 531 mW, pulse duration of 496 fs, and repetition rate of 97 MHz at 1975 nm. The research results show that Tm:CaYAlO4 is an excellent gain medium for femtosecond pulse generation at 2um wavelength.