A diode pumped tunable single-frequency Tm:YAG laser using twisted-mode technique

Abstract

A diode pumped tunable single-frequency Tm:YAG laser using the twisted-mode cavity is reported. The maximum single-frequency output power is 514 mW with a slope efficiency of 9.7%. The wavelength tuning range from 2011.587 nm to 2016.065 nm is achieved by tuning the obliquity of a 1-mm-thick etalon. The single frequency laser has a beam quality of M2 < 1.3 at the maximum single-frequency output power.

2 μm single-frequency Tm:YAG laser generated from a diode-pumped L-shaped twisted mode cavity

“…Up to 514 mW 2 µm single-frequency laser was generated from a diode-pumped Tm:YAG twisted-mode-cavity, and the slope efficiency was 9.7%. Because it was not easy to realize polarization control in higher pumping power, the 2 µm single-frequency output power could not be further increased in [15]. In this paper, we report a 2 µm single-frequency laser from an Lshaped twisted-mode-cavity Tm:YAG oscillator.…”

“…Up to 867 mW 2 µm single-frequency lasers were obtained with the diffraction limited beam quality. Compared with the microchip laser, the ring laser, and the NPRO, the twistedmode-cavity (TMC) is also a useful technique to obtain the 2 µm single-frequency laser operation [15]. The spatial hole-burning in the active medium is eliminated in the twisted-mode-cavity.…”

High power Tm:YLF bulk laser wavelength-stabilized by two F-P etalons

“…A diode-pumped Tm:YLF laser is an attractive 1.9 m source. It has a lot of advantages compared with other mediums [2][3][4][5][6], such as, no thermally induced birefringence, low up-conversion loss, higher optical damage threshold, better thermal stability and the polarizing emission laser output. Diode dual-end-pumped Tm:YLF laser is a excellent 1.9 m source, because the thulium-doped crystals have high absorption peaks at 790 nm which is just the emission wavelength of the fiber coupled output diode laser [7,8].…”

Amplification of spontaneous emission in 2μm single frequency master oscillator and fiber power amplifier

“…microchip [2,3], non-planar ring oscillators (NPRO) [4,5], twisted-mode [6], and intra-cavity etalons [7,8]. As for microchip laser, it was difficult to obtain high power single frequency output due to very short active medium.…”