Abstract

A ray-tracing code has been developed, and the design parameters of the laser pump head were analyzed in terms of crystal diameter, doping concentration, and optical cavity diameter. According to the numerical analysis, we fabricated an efficient diode-pumped Nd:YAG laser and experimentally obtained 500-W output power. The output power is close to the numerically calculated output power of approximately 450 W and corresponds to an optical-to-optical conversion efficiency of 46.7% and an optical slope efficiency of 49%.

© 2002 Optical Society of America

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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef] [PubMed]

2000 (4)

1999 (4)

J. Lee, H. J. Moon, J. Yi, B. H. Cha, “Efficient CW operation of TEM00 mode from a diffusive reflector-type diode-side pumped Nd:YAG laser,” Jpn. J. Appl. Phys. 15, L315–L317 (1999).
[CrossRef]

J. Lee, H. J. Moon, J. Yi, S. Lee, B. H. Cha, “Measurement of absorption efficiency by a leakage power analysis method from an efficient Nd:YAG rod laser pumped by diode bars,” Jpn. J. Appl. Phys. 38, 2769–2774 (1999).
[CrossRef]

H. J. Moon, J. Yi, J. Han, B. Cha, J. Lee, “Efficient diffusive reflector-type diode side-pumped Nd:YAG rod with an optical slope efficiency of 55%,” Appl. Opt. 38, 1772–1776 (1999).
[CrossRef]

S. Lee, S. K. Kim, M. Yun, B. H. Cha, J. Lee, “Design of a diode array pumped Nd:YAG laser with a truncated compound parabolic concentrator and a diffusive optical cavity,” J. Korean Phys. Soc. 35, 268–274 (1999).

1997 (2)

1996 (1)

1991 (1)

P. Laporta, M. Brussard, “Design criteria for a mode size optimization in diode-pumped solid-state lasers,” IEEE J. Quantum Electron. 27, 2319–2326 (1991).
[CrossRef]

1966 (1)

D. Findlay, R. A. Clay, “The measurement of internal losses in 4-level lasers,” Phys. Lett. 20, 277–278 (1966).
[CrossRef]

Agnesi, A.

Bass, I. L.

J. J. Chang, E. P. Dragon, I. L. Bass, “315 W pulsed-green generation with a diode-pumped Nd:YAG laser,” in Conference on Lasers and Electro-Optics (CLEO/U.S.), Vol. 6 of 1998 OSA Technical Digests (Optical Society of America, Washington, D.C., 1998), pp. CPD2-2-CPD2-3.

Brussard, M.

P. Laporta, M. Brussard, “Design criteria for a mode size optimization in diode-pumped solid-state lasers,” IEEE J. Quantum Electron. 27, 2319–2326 (1991).
[CrossRef]

Cha, B.

Cha, B. H.

S. K. Kim, S. Lee, M. Yun, S. M. Nam, B. H. Cha, J. Lee, “Numerical calculation of laser output power for various Hermite-Gaussian modes in a diode-pumped Nd:YAG laser with a modified reflective compound parabolic concentrator,” J. Korean Phys. Soc. 37, 774–777 (2000).

J. Lee, H. J. Moon, J. Yi, S. Lee, B. H. Cha, “Measurement of absorption efficiency by a leakage power analysis method from an efficient Nd:YAG rod laser pumped by diode bars,” Jpn. J. Appl. Phys. 38, 2769–2774 (1999).
[CrossRef]

J. Lee, H. J. Moon, J. Yi, B. H. Cha, “Efficient CW operation of TEM00 mode from a diffusive reflector-type diode-side pumped Nd:YAG laser,” Jpn. J. Appl. Phys. 15, L315–L317 (1999).
[CrossRef]

S. Lee, S. K. Kim, M. Yun, B. H. Cha, J. Lee, “Design of a diode array pumped Nd:YAG laser with a truncated compound parabolic concentrator and a diffusive optical cavity,” J. Korean Phys. Soc. 35, 268–274 (1999).

Chang, J. J.

J. J. Chang, E. P. Dragon, I. L. Bass, “315 W pulsed-green generation with a diode-pumped Nd:YAG laser,” in Conference on Lasers and Electro-Optics (CLEO/U.S.), Vol. 6 of 1998 OSA Technical Digests (Optical Society of America, Washington, D.C., 1998), pp. CPD2-2-CPD2-3.

Clay, R. A.

D. Findlay, R. A. Clay, “The measurement of internal losses in 4-level lasers,” Phys. Lett. 20, 277–278 (1966).
[CrossRef]

Dell’Acqua, S.

Dragon, E. P.

J. J. Chang, E. P. Dragon, I. L. Bass, “315 W pulsed-green generation with a diode-pumped Nd:YAG laser,” in Conference on Lasers and Electro-Optics (CLEO/U.S.), Vol. 6 of 1998 OSA Technical Digests (Optical Society of America, Washington, D.C., 1998), pp. CPD2-2-CPD2-3.

Findlay, D.

D. Findlay, R. A. Clay, “The measurement of internal losses in 4-level lasers,” Phys. Lett. 20, 277–278 (1966).
[CrossRef]

Fujikawa, S.

Gilbert, M.

Gobbi, P. G.

Gu, J.

Han, J.

Hirano, Y.

Kim, S. K.

S. K. Kim, S. Lee, M. Yun, S. M. Nam, B. H. Cha, J. Lee, “Numerical calculation of laser output power for various Hermite-Gaussian modes in a diode-pumped Nd:YAG laser with a modified reflective compound parabolic concentrator,” J. Korean Phys. Soc. 37, 774–777 (2000).

S. Lee, S. K. Kim, M. Yun, B. H. Cha, J. Lee, “Design of a diode array pumped Nd:YAG laser with a truncated compound parabolic concentrator and a diffusive optical cavity,” J. Korean Phys. Soc. 35, 268–274 (1999).

Kojima, T.

Konno, S.

Koyata, Y.

Lam, Y.-L.

Laporta, P.

P. Laporta, M. Brussard, “Design criteria for a mode size optimization in diode-pumped solid-state lasers,” IEEE J. Quantum Electron. 27, 2319–2326 (1991).
[CrossRef]

Le Garrec, B. J.

Lee, J.

S. K. Kim, S. Lee, M. Yun, S. M. Nam, B. H. Cha, J. Lee, “Numerical calculation of laser output power for various Hermite-Gaussian modes in a diode-pumped Nd:YAG laser with a modified reflective compound parabolic concentrator,” J. Korean Phys. Soc. 37, 774–777 (2000).

S. Lee, S. K. Kim, M. Yun, B. H. Cha, J. Lee, “Design of a diode array pumped Nd:YAG laser with a truncated compound parabolic concentrator and a diffusive optical cavity,” J. Korean Phys. Soc. 35, 268–274 (1999).

J. Lee, H. J. Moon, J. Yi, S. Lee, B. H. Cha, “Measurement of absorption efficiency by a leakage power analysis method from an efficient Nd:YAG rod laser pumped by diode bars,” Jpn. J. Appl. Phys. 38, 2769–2774 (1999).
[CrossRef]

J. Lee, H. J. Moon, J. Yi, B. H. Cha, “Efficient CW operation of TEM00 mode from a diffusive reflector-type diode-side pumped Nd:YAG laser,” Jpn. J. Appl. Phys. 15, L315–L317 (1999).
[CrossRef]

H. J. Moon, J. Yi, J. Han, B. Cha, J. Lee, “Efficient diffusive reflector-type diode side-pumped Nd:YAG rod with an optical slope efficiency of 55%,” Appl. Opt. 38, 1772–1776 (1999).
[CrossRef]

Lee, S.

S. K. Kim, S. Lee, M. Yun, S. M. Nam, B. H. Cha, J. Lee, “Numerical calculation of laser output power for various Hermite-Gaussian modes in a diode-pumped Nd:YAG laser with a modified reflective compound parabolic concentrator,” J. Korean Phys. Soc. 37, 774–777 (2000).

J. Lee, H. J. Moon, J. Yi, S. Lee, B. H. Cha, “Measurement of absorption efficiency by a leakage power analysis method from an efficient Nd:YAG rod laser pumped by diode bars,” Jpn. J. Appl. Phys. 38, 2769–2774 (1999).
[CrossRef]

S. Lee, S. K. Kim, M. Yun, B. H. Cha, J. Lee, “Design of a diode array pumped Nd:YAG laser with a truncated compound parabolic concentrator and a diffusive optical cavity,” J. Korean Phys. Soc. 35, 268–274 (1999).

Liu, J.

Moon, H. J.

J. Lee, H. J. Moon, J. Yi, B. H. Cha, “Efficient CW operation of TEM00 mode from a diffusive reflector-type diode-side pumped Nd:YAG laser,” Jpn. J. Appl. Phys. 15, L315–L317 (1999).
[CrossRef]

H. J. Moon, J. Yi, J. Han, B. Cha, J. Lee, “Efficient diffusive reflector-type diode side-pumped Nd:YAG rod with an optical slope efficiency of 55%,” Appl. Opt. 38, 1772–1776 (1999).
[CrossRef]

J. Lee, H. J. Moon, J. Yi, S. Lee, B. H. Cha, “Measurement of absorption efficiency by a leakage power analysis method from an efficient Nd:YAG rod laser pumped by diode bars,” Jpn. J. Appl. Phys. 38, 2769–2774 (1999).
[CrossRef]

Nam, S. M.

S. K. Kim, S. Lee, M. Yun, S. M. Nam, B. H. Cha, J. Lee, “Numerical calculation of laser output power for various Hermite-Gaussian modes in a diode-pumped Nd:YAG laser with a modified reflective compound parabolic concentrator,” J. Korean Phys. Soc. 37, 774–777 (2000).

Pavel, N.

Ragazzi, D.

Razé, G. J.

Reali, G. C.

Tajime, T.

Tam, S.-C.

Tan, W.

Thro, P. Y.

Xie, W.

Yamamoto, S.

Yang, H.

Yasui, K.

Yi, J.

J. Lee, H. J. Moon, J. Yi, S. Lee, B. H. Cha, “Measurement of absorption efficiency by a leakage power analysis method from an efficient Nd:YAG rod laser pumped by diode bars,” Jpn. J. Appl. Phys. 38, 2769–2774 (1999).
[CrossRef]

H. J. Moon, J. Yi, J. Han, B. Cha, J. Lee, “Efficient diffusive reflector-type diode side-pumped Nd:YAG rod with an optical slope efficiency of 55%,” Appl. Opt. 38, 1772–1776 (1999).
[CrossRef]

J. Lee, H. J. Moon, J. Yi, B. H. Cha, “Efficient CW operation of TEM00 mode from a diffusive reflector-type diode-side pumped Nd:YAG laser,” Jpn. J. Appl. Phys. 15, L315–L317 (1999).
[CrossRef]

Yun, M.

S. K. Kim, S. Lee, M. Yun, S. M. Nam, B. H. Cha, J. Lee, “Numerical calculation of laser output power for various Hermite-Gaussian modes in a diode-pumped Nd:YAG laser with a modified reflective compound parabolic concentrator,” J. Korean Phys. Soc. 37, 774–777 (2000).

S. Lee, S. K. Kim, M. Yun, B. H. Cha, J. Lee, “Design of a diode array pumped Nd:YAG laser with a truncated compound parabolic concentrator and a diffusive optical cavity,” J. Korean Phys. Soc. 35, 268–274 (1999).

Appl. Opt. (5)

IEEE J. Quantum Electron. (1)

P. Laporta, M. Brussard, “Design criteria for a mode size optimization in diode-pumped solid-state lasers,” IEEE J. Quantum Electron. 27, 2319–2326 (1991).
[CrossRef]

J. Korean Phys. Soc. (2)

S. Lee, S. K. Kim, M. Yun, B. H. Cha, J. Lee, “Design of a diode array pumped Nd:YAG laser with a truncated compound parabolic concentrator and a diffusive optical cavity,” J. Korean Phys. Soc. 35, 268–274 (1999).

S. K. Kim, S. Lee, M. Yun, S. M. Nam, B. H. Cha, J. Lee, “Numerical calculation of laser output power for various Hermite-Gaussian modes in a diode-pumped Nd:YAG laser with a modified reflective compound parabolic concentrator,” J. Korean Phys. Soc. 37, 774–777 (2000).

Jpn. J. Appl. Phys. (2)

J. Lee, H. J. Moon, J. Yi, B. H. Cha, “Efficient CW operation of TEM00 mode from a diffusive reflector-type diode-side pumped Nd:YAG laser,” Jpn. J. Appl. Phys. 15, L315–L317 (1999).
[CrossRef]

J. Lee, H. J. Moon, J. Yi, S. Lee, B. H. Cha, “Measurement of absorption efficiency by a leakage power analysis method from an efficient Nd:YAG rod laser pumped by diode bars,” Jpn. J. Appl. Phys. 38, 2769–2774 (1999).
[CrossRef]

Opt. Lett. (2)

Phys. Lett. (1)

D. Findlay, R. A. Clay, “The measurement of internal losses in 4-level lasers,” Phys. Lett. 20, 277–278 (1966).
[CrossRef]

Other (1)

J. J. Chang, E. P. Dragon, I. L. Bass, “315 W pulsed-green generation with a diode-pumped Nd:YAG laser,” in Conference on Lasers and Electro-Optics (CLEO/U.S.), Vol. 6 of 1998 OSA Technical Digests (Optical Society of America, Washington, D.C., 1998), pp. CPD2-2-CPD2-3.

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Figures (8)

Fig. 1
Fig. 1

Schematic of a three-slit symmetric pump head consisting of a Nd:YAG rod, a cooling sleeve, a diffusive optical cavity, and three diode array modules.

Fig. 2
Fig. 2

Absorption efficiency calculated for the various inner diameters of a diffusive optical cavity.

Fig. 3
Fig. 3

Absorbed power distributions calculated for cavity diameters of (a) 10 mm and (b) 16 mm.

Fig. 4
Fig. 4

Absorption efficiency calculated for various absorption coefficients of the crystal rod.

Fig. 5
Fig. 5

Absorbed power distributions calculated for the absorption coefficients of (a) 2.78 cm-1 and (b) 5.5 cm-1.

Fig. 6
Fig. 6

Absorption efficiency calculated for various diameters of the crystal rod.

Fig. 7
Fig. 7

Absorbed power distributions calculated for crystal rod diameters of (a) 5 cm and (b) 6 cm. Fluorescence distributions measured for crystal rod diameters of (c) 5 cm and (d) 6 cm.

Fig. 8
Fig. 8

Laser output powers calculated and measured for the different input pump powers.

Equations (5)

Equations on this page are rendered with MathJax. Learn more.

P1θ1=12πσexp-θ122σ2,
n2rˆ2=n1rˆ1+n2rˆ2 · nˆ-n1rˆ1 · nˆnˆ,
Pabs i,j=P0i,j1-exp-αΔd1
P2=-θ+θ p2θ2dθ2=12-θ+θcos θ2dθ2=ad2,
1Pu=2IsatL02π0g0¯r, θfr, θ1+2Poutfr, θ/TocIsat rdrdθ,

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