Influence of energy-transfer upconversion on the performance of high-power diode-end-pumped CW lasers

The influence of energy-transfer upconversion (ETU) on the performance of diode-end-pumped lasers is studied by including ETU effects into the space-dependent rate equations. The dependence of ETU rates on the mode-to-pump size ratio and on the output mirror transmission is derived. Experiments for Nd:YAG and Nd:YVO/sub 4/ crystals are performed to validate the present model. It is found that the ETU process increases the sensitivity of the output power to the output mirror transmission but its influence on the output power is not significant for low output transmission.

[1]  William L. Nighan,et al.  Diode-bar-pumped Nd:YVO 4 lasers with >13-W TEM 00 output at >50% efficiency , 1995 .

[2]  P. Laporta,et al.  Design criteria for mode size optimization in diode-pumped solid-state lasers , 1991 .

[3]  Chia-Chun Liao,et al.  Determination of the Auger upconversion rate in fiber-coupled diode end-pumped Nd:YAG and Nd:YVO4 crystals , 2000 .

[4]  Yung-Fu Chen,et al.  Optimization in scaling fiber-coupled laser-diode end-pumped lasers to higher power: influence of thermal effect , 1997 .

[5]  Kenju Otsuka,et al.  Single‐transverse‐mode LiNdP4O12 slab waveguide laser , 1979 .

[6]  Mikhail A. Noginov,et al.  Study of luminescence concentration quenching and energy transfer upconversion in Nd-doped LaSc 3 (BO 3 ) 4 and GdVO 4 laser crystals , 1998 .

[7]  D. C. Hanna,et al.  Energy-transfer upconversion and thermal lensing in high-power end-pumped Nd:YLF laser crystals , 1999 .

[8]  R L Byer,et al.  Diode laser--pumped solid-state lasers. , 1988, Science.

[9]  Anne C. Tropper,et al.  High-inversion densities in Nd:YAG-upconversion and bleaching , 1998 .

[10]  M. S. Bowers,et al.  Scaling CW diode-end-pumped Nd:YAG lasers to high average powers , 1992 .

[11]  D. Sipes,et al.  Highly efficient neodymium:yttrium aluminum garnet laser end pumped by a semiconductor laser array , 1985 .

[12]  D. C. Hanna,et al.  Upconversion, lifetime quenching, and ground-state bleaching in Nd3+:LiYF4 , 1998 .

[13]  William F. Krupke,et al.  Auger upconversion losses in Nd-doped laser glasses , 1994 .

[14]  David Jones,et al.  High power , 1994, Nature.

[15]  Garnier,et al.  Excited-state-absorption and upconversion studies of Nd3+-doped single crystals Y3Al5O12, YLiF4, and LaMgAl11O19. , 1995, Physical review. B, Condensed matter.

[16]  David F. Welch,et al.  High power, high efficient neodymium:yttrium aluminum garnet laser end pumped by a laser diode array , 1987 .

[17]  Aaas News,et al.  Book Reviews , 1893, Buffalo Medical and Surgical Journal.

[18]  Yung-Fu Chen,et al.  Design criteria for concentration optimization in scaling diode end-pumped lasers to high powers: influence of thermal fracture , 1999 .