THERMAL EFFECTS IN END-PUMPED ND:PHOSPHATE GLASSES

Thermal effects in continuous‐wave end‐pumped Nd:phosphate glass were studied. Thermally induced fracture was due to the tangential stress at the peripheries of the samples near the front entrance. For pump beam size much smaller than the diameter of a cylinder rod or the thickness of the cross section of a rectangular slab, the critical pump power causing thermal fracture depends only on the heat absorbed per unit length. The focal length of thermal lensing was measured to be ∼1 cm at an incident pump power of 2 W. Thermally induced birefringence significantly affected the laser oscillation.

[1]  J. Foster,et al.  Thermal Effects in a Nd:YAG Laser , 1970 .

[2]  J. C. Jaeger,et al.  Conduction of Heat in Solids , 1952 .

[3]  Emil Wolf,et al.  Principles of Optics: Contents , 1999 .

[4]  A. K. Cousins,et al.  Temperature and thermal stress scaling in finite-length end-pumped laser rods , 1992 .

[5]  W. Koechner,et al.  Thermal Lensing in a Nd:YAG Laser Rod. , 1970, Applied optics.

[6]  S. Kishida,et al.  cw oscillation in a Nd : phosphate glass laser , 1979 .

[7]  P. Ho,et al.  Generation of ultrashort pulses from a neodymium glass laser system , 1989 .

[8]  U. O. Farrukh,et al.  An analysis of the temperature distribution in finite solid-state laser rods , 1988 .

[9]  T. Royt.  Passive mode-locking of the Nd-glass oscillator at high repetition rate with thermally compensated phosphate glasses , 1980 .

[10]  R. Byer,et al.  The slab geometry laser - Part II: Thermal effects in a finite slab , 1985, IEEE Journal of Quantum Electronics.

[11]  P. Ho,et al.  An actively mode-locked continuous wave Nd:phosphate glass laser oscillator and regenerative amplifier , 1988 .

[12]  John E. Marion,et al.  Fracture of solid state laser slabs , 1986 .

[13]  W. Koechner,et al.  Effect of birefringence on the performance of linearly polarized YAG:Nd lasers , 1970 .

[14]  R. A. Fields,et al.  Thermal modeling of continuous‐wave end‐pumped solid‐state lasers , 1990 .

[15]  Walter Koechner,et al.  Solid-State Laser Engineering , 1976 .

[16]  H. Weber,et al.  Modeling of thermal lensing and higher order ring mode oscillation in end-pumped C-W Nd:YAG lasers , 1992 .