Abstract

Efficient lasing of Nd:Ca (Nb, Ga)2–x Ga3–garnet (CNGG) disordered crystal pumped by a laser diode was demonstrated. In the end-pumped cw lasing experiment with a single-stripe diode, a slope efficiency of 24.2% and a maximum optical conversion efficiency of 19.3% were obtained. It was shown that the dependence of cw output power on the pump wavelength is insensitive compared with Nd:YAG because of the broad pump absorption bandwidth of Nd:CNGG. From the diode-bar-pumped experiment, it was confirmed that Nd:CNGG is a promising material for diode-bar pumping to obtain high average power with good beam quality, because of its advantages of a broader pump absorption band compared with that of Nd:YAG and the higher thermal conductivity compared with Nd-doped glasses.

© 1993 Optical Society of America

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References

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  1. H. R. Verdun, L. M. Thomas, “Nd:CaYAIO4—a new crystal for solid-state lasers emitting at 1.08 μm,” Appl. Phys. Lett. 56, 608–610 (1990).
    [CrossRef]
  2. F. Hanson, D. Dick, H. R. Verdun, M. Kokta, “Optical properties and lasing of Nd:SrGdGa3O7,” J. Opt. Soc. Am. B 8, 1668–1673 (1991).
    [CrossRef]
  3. A. A. Kaminskii, H. R. Verdun, V. B. Mill, A. A. Paviyuk, A. V. Butashin, “Two new continuous lasers with diode laser pumping on the base of disordered crystals Ca3(Nb, Ga)2Ga3O12 and KLa(MnO4)2 with Nd3+,” Russ. Acad. Sci. Neorg. Mater. 26, 438–440 (1992).
  4. Yu. K. Voron’ko, S. B. Bessen, N. A. Es’kov, V. V. Osiko, A. A. Sobol’, M. I. Timoshechkin, S. N. Ushakov, L. I. Tsymbal, “Spectroscopic and lasing properties of calcium niobium gallium garnet activated with Cr3+ and Nd3+,” Sov. J. Quantum Electron. 18, 198–201 (1988).
    [CrossRef]
  5. T. Y. Fan, R. L. Byer, “Diode laser-pumped solid-state lasers,” IEEE J. Quantum Electron. 28, 895–912 (1988).
    [CrossRef]

1992 (1)

A. A. Kaminskii, H. R. Verdun, V. B. Mill, A. A. Paviyuk, A. V. Butashin, “Two new continuous lasers with diode laser pumping on the base of disordered crystals Ca3(Nb, Ga)2Ga3O12 and KLa(MnO4)2 with Nd3+,” Russ. Acad. Sci. Neorg. Mater. 26, 438–440 (1992).

1991 (1)

1990 (1)

H. R. Verdun, L. M. Thomas, “Nd:CaYAIO4—a new crystal for solid-state lasers emitting at 1.08 μm,” Appl. Phys. Lett. 56, 608–610 (1990).
[CrossRef]

1988 (2)

Yu. K. Voron’ko, S. B. Bessen, N. A. Es’kov, V. V. Osiko, A. A. Sobol’, M. I. Timoshechkin, S. N. Ushakov, L. I. Tsymbal, “Spectroscopic and lasing properties of calcium niobium gallium garnet activated with Cr3+ and Nd3+,” Sov. J. Quantum Electron. 18, 198–201 (1988).
[CrossRef]

T. Y. Fan, R. L. Byer, “Diode laser-pumped solid-state lasers,” IEEE J. Quantum Electron. 28, 895–912 (1988).
[CrossRef]

Bessen, S. B.

Yu. K. Voron’ko, S. B. Bessen, N. A. Es’kov, V. V. Osiko, A. A. Sobol’, M. I. Timoshechkin, S. N. Ushakov, L. I. Tsymbal, “Spectroscopic and lasing properties of calcium niobium gallium garnet activated with Cr3+ and Nd3+,” Sov. J. Quantum Electron. 18, 198–201 (1988).
[CrossRef]

Butashin, A. V.

A. A. Kaminskii, H. R. Verdun, V. B. Mill, A. A. Paviyuk, A. V. Butashin, “Two new continuous lasers with diode laser pumping on the base of disordered crystals Ca3(Nb, Ga)2Ga3O12 and KLa(MnO4)2 with Nd3+,” Russ. Acad. Sci. Neorg. Mater. 26, 438–440 (1992).

Byer, R. L.

T. Y. Fan, R. L. Byer, “Diode laser-pumped solid-state lasers,” IEEE J. Quantum Electron. 28, 895–912 (1988).
[CrossRef]

Dick, D.

Es’kov, N. A.

Yu. K. Voron’ko, S. B. Bessen, N. A. Es’kov, V. V. Osiko, A. A. Sobol’, M. I. Timoshechkin, S. N. Ushakov, L. I. Tsymbal, “Spectroscopic and lasing properties of calcium niobium gallium garnet activated with Cr3+ and Nd3+,” Sov. J. Quantum Electron. 18, 198–201 (1988).
[CrossRef]

Fan, T. Y.

T. Y. Fan, R. L. Byer, “Diode laser-pumped solid-state lasers,” IEEE J. Quantum Electron. 28, 895–912 (1988).
[CrossRef]

Hanson, F.

Kaminskii, A. A.

A. A. Kaminskii, H. R. Verdun, V. B. Mill, A. A. Paviyuk, A. V. Butashin, “Two new continuous lasers with diode laser pumping on the base of disordered crystals Ca3(Nb, Ga)2Ga3O12 and KLa(MnO4)2 with Nd3+,” Russ. Acad. Sci. Neorg. Mater. 26, 438–440 (1992).

Kokta, M.

Mill, V. B.

A. A. Kaminskii, H. R. Verdun, V. B. Mill, A. A. Paviyuk, A. V. Butashin, “Two new continuous lasers with diode laser pumping on the base of disordered crystals Ca3(Nb, Ga)2Ga3O12 and KLa(MnO4)2 with Nd3+,” Russ. Acad. Sci. Neorg. Mater. 26, 438–440 (1992).

Osiko, V. V.

Yu. K. Voron’ko, S. B. Bessen, N. A. Es’kov, V. V. Osiko, A. A. Sobol’, M. I. Timoshechkin, S. N. Ushakov, L. I. Tsymbal, “Spectroscopic and lasing properties of calcium niobium gallium garnet activated with Cr3+ and Nd3+,” Sov. J. Quantum Electron. 18, 198–201 (1988).
[CrossRef]

Paviyuk, A. A.

A. A. Kaminskii, H. R. Verdun, V. B. Mill, A. A. Paviyuk, A. V. Butashin, “Two new continuous lasers with diode laser pumping on the base of disordered crystals Ca3(Nb, Ga)2Ga3O12 and KLa(MnO4)2 with Nd3+,” Russ. Acad. Sci. Neorg. Mater. 26, 438–440 (1992).

Sobol’, A. A.

Yu. K. Voron’ko, S. B. Bessen, N. A. Es’kov, V. V. Osiko, A. A. Sobol’, M. I. Timoshechkin, S. N. Ushakov, L. I. Tsymbal, “Spectroscopic and lasing properties of calcium niobium gallium garnet activated with Cr3+ and Nd3+,” Sov. J. Quantum Electron. 18, 198–201 (1988).
[CrossRef]

Thomas, L. M.

H. R. Verdun, L. M. Thomas, “Nd:CaYAIO4—a new crystal for solid-state lasers emitting at 1.08 μm,” Appl. Phys. Lett. 56, 608–610 (1990).
[CrossRef]

Timoshechkin, M. I.

Yu. K. Voron’ko, S. B. Bessen, N. A. Es’kov, V. V. Osiko, A. A. Sobol’, M. I. Timoshechkin, S. N. Ushakov, L. I. Tsymbal, “Spectroscopic and lasing properties of calcium niobium gallium garnet activated with Cr3+ and Nd3+,” Sov. J. Quantum Electron. 18, 198–201 (1988).
[CrossRef]

Tsymbal, L. I.

Yu. K. Voron’ko, S. B. Bessen, N. A. Es’kov, V. V. Osiko, A. A. Sobol’, M. I. Timoshechkin, S. N. Ushakov, L. I. Tsymbal, “Spectroscopic and lasing properties of calcium niobium gallium garnet activated with Cr3+ and Nd3+,” Sov. J. Quantum Electron. 18, 198–201 (1988).
[CrossRef]

Ushakov, S. N.

Yu. K. Voron’ko, S. B. Bessen, N. A. Es’kov, V. V. Osiko, A. A. Sobol’, M. I. Timoshechkin, S. N. Ushakov, L. I. Tsymbal, “Spectroscopic and lasing properties of calcium niobium gallium garnet activated with Cr3+ and Nd3+,” Sov. J. Quantum Electron. 18, 198–201 (1988).
[CrossRef]

Verdun, H. R.

A. A. Kaminskii, H. R. Verdun, V. B. Mill, A. A. Paviyuk, A. V. Butashin, “Two new continuous lasers with diode laser pumping on the base of disordered crystals Ca3(Nb, Ga)2Ga3O12 and KLa(MnO4)2 with Nd3+,” Russ. Acad. Sci. Neorg. Mater. 26, 438–440 (1992).

F. Hanson, D. Dick, H. R. Verdun, M. Kokta, “Optical properties and lasing of Nd:SrGdGa3O7,” J. Opt. Soc. Am. B 8, 1668–1673 (1991).
[CrossRef]

H. R. Verdun, L. M. Thomas, “Nd:CaYAIO4—a new crystal for solid-state lasers emitting at 1.08 μm,” Appl. Phys. Lett. 56, 608–610 (1990).
[CrossRef]

Voron’ko, Yu. K.

Yu. K. Voron’ko, S. B. Bessen, N. A. Es’kov, V. V. Osiko, A. A. Sobol’, M. I. Timoshechkin, S. N. Ushakov, L. I. Tsymbal, “Spectroscopic and lasing properties of calcium niobium gallium garnet activated with Cr3+ and Nd3+,” Sov. J. Quantum Electron. 18, 198–201 (1988).
[CrossRef]

Appl. Phys. Lett. (1)

H. R. Verdun, L. M. Thomas, “Nd:CaYAIO4—a new crystal for solid-state lasers emitting at 1.08 μm,” Appl. Phys. Lett. 56, 608–610 (1990).
[CrossRef]

IEEE J. Quantum Electron. (1)

T. Y. Fan, R. L. Byer, “Diode laser-pumped solid-state lasers,” IEEE J. Quantum Electron. 28, 895–912 (1988).
[CrossRef]

J. Opt. Soc. Am. B (1)

Russ. Acad. Sci. Neorg. Mater. (1)

A. A. Kaminskii, H. R. Verdun, V. B. Mill, A. A. Paviyuk, A. V. Butashin, “Two new continuous lasers with diode laser pumping on the base of disordered crystals Ca3(Nb, Ga)2Ga3O12 and KLa(MnO4)2 with Nd3+,” Russ. Acad. Sci. Neorg. Mater. 26, 438–440 (1992).

Sov. J. Quantum Electron. (1)

Yu. K. Voron’ko, S. B. Bessen, N. A. Es’kov, V. V. Osiko, A. A. Sobol’, M. I. Timoshechkin, S. N. Ushakov, L. I. Tsymbal, “Spectroscopic and lasing properties of calcium niobium gallium garnet activated with Cr3+ and Nd3+,” Sov. J. Quantum Electron. 18, 198–201 (1988).
[CrossRef]

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Figures (5)

Fig. 1
Fig. 1

Comparison of the (a) absorption spectra and (b) fluorescence spectra of Nd:CNGG, Nd:YAG, and Nd:phosphate glass (Hoya LHG8).

Fig. 2
Fig. 2

Continuous wave input–output characteristics of the end-pumped Nd:CNGG laser using a single-stripe diode.

Fig. 3
Fig. 3

Continuous wave output power dependencies on the pump wavelength. Pump power was 500 mW.

Fig. 4
Fig. 4

Quasi-cw lasing performances with side pumping using a diode bar. Pumping pulse width was 600 μs.

Fig. 5
Fig. 5

Pump bandwidth dependencies of the effective absorption coefficient. The effective absorption coefficient was calculated from the absorption spectrum measured by a monochromator, assuming that the pump light has a rectangular spectral shape and the absorption length is 1 mm.

Tables (3)

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Table 1 Comparison of Spectroscopic Properties

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Table 2 Comparison of Diode-Pumped Lasing Characteristics

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Table 3 Comparison of the Experimental and Theoretical Slope Efficiencies (Normalized to Nd:YAG)

Equations (1)

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σ = h ν p 2 τ λ p λ 0 T P th η s S eff ,

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