Comparison of thermal lensing effects between single-end and double-end diffusion-bonded Nd:YVO_4 crystals for ^4F_3/2?^4I_11/2 and ^4F_3/2?^4I_13/2 transitions

Abstract

The effective focal lengths of thermal lens in diode-end-pumped continuous-wave Nd:YVO(4) lasers for the (4)F(3/2)-->(4)I(11/2) and (4)F(3/2)-->(4)I(13/2) transitions were determined. The experimental results revealed that the thermal lensing effect for the (4)F(3/2)-->(4)I(11/2) transition can be sufficiently improved by employing a single-end diffusion-bonded Nd:YVO(4) crystal replacing a conventional Nd:YVO(4) crystal. However, using a double-end diffusion-bonded Nd:YVO(4) crystal was a great improvement over a single-end diffusion-bonded Nd:YVO(4) crystal for the (4)F(3/2)-->(4)I(13/2) transition with stronger thermal lensing effect.

Optical characterisation of hydroxide catalysed bonds applied to phosphate glass

“…The LIDT tests at 1535 nm gave a value between 1620 MW/cm 2 in these studies alongside the ones of this work suggest that the LIDT of the bond is well above what is required for common applications in photonics and high power lasers. The results from this work do not allow any highlight of the influence of the concentration on the power at which the first damage is witnessed as all thresholds measured are in the same range.…”

“…All these properties are also sought in the photonics industry where composite components allow the tackling of problems such as thermal lensing by bonding appropriate materials 2 . Some other techniques have been consistently used in the past years for that purpose.…”

Crystal growth and thermal properties of the laser crystal Yb3+:Gd3(Al Ga1−)5O12

“…[30,31], the thermal-optical coefficient ðdn=dTÞ can be calculated by the thermal focal length (f) using the following formulas:…”

Compact and efficient Kerr-lens mode-locked diode-pumped actively Q-switched YVO4–Nd:YVO4 laser

“…Then the deposited thermal energy is diffused effectively to the "cool" undoped region. In 2008, Chang [18]. Though a lot of excellent experimental results have revealed that application of the bonding crystal can effectively reduce the thermal effects and increase the conversion efficiency [15][16][17], no study on the characteristics of the Q-switched and mode locking laser using the bonding crystal as the gain medium has been carried out up to date.…”