High-repetition-rate quasi-CW side-pumped mJ eye-safe laser with a monolithic KTP crystal for intracavity optical parametric oscillator

Abstract

We demonstrate a high-repetition-rate millijoule passively Q-switched eye-safe Nd:YVO(4) laser pumped by a quasi-CW diode stack. A theoretical analysis has been explored for the design criteria of generating TEM(n,0) mode in the diode-stack directly side-pumping configuration. We successfully generate TEM(n,0) modes at 1064 nm by adjusting the gain medium with respected to the laser axis. We further observe the spatial cleaning ability for generating an nearly TEM(0,0) mode output at 1573 nm with a monolithic OPO cavity. At the repetition rate up to 200 Hz, the output pulse energy reaches 1.21 mJ with the threshold pump energy of 17.9 mJ.

16.7 W 885 nm diode-side-pumped activelyQ-switched Nd:YAG/YVO4intracavity Raman laser at 1176 nm

“…Nonlinear frequency conversion, such as stimulated Raman scattering (SRS) [1][2][3][4][5][6][7][8][9][10][11][12] and optical parametric oscillators (OPO) [13,14], is widely employed for extending the laser wavelength. Due to the intrinsic properties of high efficiency and Raman clean-up of the spatial beam profile, SRS provides a promising route to achieve high-quality all-solidstate coherent radiation sources from the visible to the 1.5x µm eye-safe infrared region [1][2][3][4][5].…”

Super-luminescence and spectral hole burning effect in ultra-short length Er/Yb-doped phosphate fiber

“…Yb-Er-co-doped phosphate glasses are characterized also by reasonably high photosensitivity, what gives an opportunity to design effective DFB lasers [12]. Due to these properties, phosphate glasses have recently become appealing for optical communications [13], laser sources as well as optical amplifiers with record values of the gain per unit [14][15][16][17] and optical parametric oscillators [18].…”

The influence of energy transfer upconversion on Q-switched single resonator optical parametric oscillator

“…In the previous studies on intracavity optical parametric oscillator (IOPO) in a pulse regime, the influence of ETU was not considered [9][10][11][12][13][14][15][16], though the ETU process has a significant influence on the initial population inversion of Nd : doped based in, IOPOs.…”