Abstract

We used a cw-pumped, Q-switched, and mode-locked Nd:YAG oscillator and a cw-pumped, multipass traveling-wave amplifier with a face-pumped total-internal-reflection Nd:YAG slab as the gain element to produce an 80-W, TEM00 diffraction-limited beam at a Q-switching rate of 10 kHz (50 W at 3 kHz). The output of this device was used to synchronously pump a degenerate optical parametric oscillator that utilized six KTiOPO4 crystals as nonlinear converters. A maximum average power of 14 W at 2.128 μm was generated with a conversion efficiency of 25% at 4.25 kHz.

© 1993 Optical Society of America

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References

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  1. R. H. Kingston, “Parametric amplification and oscillation at optical frequencies,” Proc. IRE 50, 472 (1962).
  2. J. A. Giordmaine, Robert C. Miller, “Tunable coherent parametric oscillation in LiNbO3at optical frequencies,” Phys. Rev. Lett. 14, 973–976 (1965).
    [CrossRef]
  3. E. O. Ammann, M. K. Oshman, J. D. Foster, J. M. Yarborough, “Repetitively pumped optical parametric oscillator at 2.13 μ m,” Appl. Phys. Lett. 15, 131–133 (1969).
    [CrossRef]
  4. K. Burneika, M. Ignatavicius, V. Kabelka, A. Piskarkas, A. Stabinis, “Parametric light amplification and oscillation in KDP with mode-locked pump,” IEEE J. Quantum Electron. QE-8, 574 (1972).
    [CrossRef]
  5. L. J. Bromley, A. Guy, D. C. Hanna, “Synchronously pumped optical parametric oscillation in beta-barium borate,” Opt. Commun. 67, 316–320 (1988).
    [CrossRef]
  6. A. E. Siegman, “New developments in laser resonators,” in Optical Resonators, D. A. Holmes, ed., Proc. Soc. Photo-Opt. Instrum. Eng.1224, 2–14 (1990).
    [CrossRef]
  7. C. I. Miyake, F. Braun, D. L. Guyer, “High-efficiency synchronously pumped degenerate KTP optical parametric oscillator,” in Advanced Solid State Lasers, L. L. Chase, A. A. Pinto, eds., Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1992), pp. 350–352.
  8. D. Eimerl, “High average power harmonic generation,” IEEE J. Quantum Electron. QE-23, 575–592 (1987).
    [CrossRef]

1988

L. J. Bromley, A. Guy, D. C. Hanna, “Synchronously pumped optical parametric oscillation in beta-barium borate,” Opt. Commun. 67, 316–320 (1988).
[CrossRef]

1987

D. Eimerl, “High average power harmonic generation,” IEEE J. Quantum Electron. QE-23, 575–592 (1987).
[CrossRef]

1972

K. Burneika, M. Ignatavicius, V. Kabelka, A. Piskarkas, A. Stabinis, “Parametric light amplification and oscillation in KDP with mode-locked pump,” IEEE J. Quantum Electron. QE-8, 574 (1972).
[CrossRef]

1969

E. O. Ammann, M. K. Oshman, J. D. Foster, J. M. Yarborough, “Repetitively pumped optical parametric oscillator at 2.13 μ m,” Appl. Phys. Lett. 15, 131–133 (1969).
[CrossRef]

1965

J. A. Giordmaine, Robert C. Miller, “Tunable coherent parametric oscillation in LiNbO3at optical frequencies,” Phys. Rev. Lett. 14, 973–976 (1965).
[CrossRef]

1962

R. H. Kingston, “Parametric amplification and oscillation at optical frequencies,” Proc. IRE 50, 472 (1962).

Ammann, E. O.

E. O. Ammann, M. K. Oshman, J. D. Foster, J. M. Yarborough, “Repetitively pumped optical parametric oscillator at 2.13 μ m,” Appl. Phys. Lett. 15, 131–133 (1969).
[CrossRef]

Braun, F.

C. I. Miyake, F. Braun, D. L. Guyer, “High-efficiency synchronously pumped degenerate KTP optical parametric oscillator,” in Advanced Solid State Lasers, L. L. Chase, A. A. Pinto, eds., Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1992), pp. 350–352.

Bromley, L. J.

L. J. Bromley, A. Guy, D. C. Hanna, “Synchronously pumped optical parametric oscillation in beta-barium borate,” Opt. Commun. 67, 316–320 (1988).
[CrossRef]

Burneika, K.

K. Burneika, M. Ignatavicius, V. Kabelka, A. Piskarkas, A. Stabinis, “Parametric light amplification and oscillation in KDP with mode-locked pump,” IEEE J. Quantum Electron. QE-8, 574 (1972).
[CrossRef]

Eimerl, D.

D. Eimerl, “High average power harmonic generation,” IEEE J. Quantum Electron. QE-23, 575–592 (1987).
[CrossRef]

Foster, J. D.

E. O. Ammann, M. K. Oshman, J. D. Foster, J. M. Yarborough, “Repetitively pumped optical parametric oscillator at 2.13 μ m,” Appl. Phys. Lett. 15, 131–133 (1969).
[CrossRef]

Giordmaine, J. A.

J. A. Giordmaine, Robert C. Miller, “Tunable coherent parametric oscillation in LiNbO3at optical frequencies,” Phys. Rev. Lett. 14, 973–976 (1965).
[CrossRef]

Guy, A.

L. J. Bromley, A. Guy, D. C. Hanna, “Synchronously pumped optical parametric oscillation in beta-barium borate,” Opt. Commun. 67, 316–320 (1988).
[CrossRef]

Guyer, D. L.

C. I. Miyake, F. Braun, D. L. Guyer, “High-efficiency synchronously pumped degenerate KTP optical parametric oscillator,” in Advanced Solid State Lasers, L. L. Chase, A. A. Pinto, eds., Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1992), pp. 350–352.

Hanna, D. C.

L. J. Bromley, A. Guy, D. C. Hanna, “Synchronously pumped optical parametric oscillation in beta-barium borate,” Opt. Commun. 67, 316–320 (1988).
[CrossRef]

Ignatavicius, M.

K. Burneika, M. Ignatavicius, V. Kabelka, A. Piskarkas, A. Stabinis, “Parametric light amplification and oscillation in KDP with mode-locked pump,” IEEE J. Quantum Electron. QE-8, 574 (1972).
[CrossRef]

Kabelka, V.

K. Burneika, M. Ignatavicius, V. Kabelka, A. Piskarkas, A. Stabinis, “Parametric light amplification and oscillation in KDP with mode-locked pump,” IEEE J. Quantum Electron. QE-8, 574 (1972).
[CrossRef]

Kingston, R. H.

R. H. Kingston, “Parametric amplification and oscillation at optical frequencies,” Proc. IRE 50, 472 (1962).

Miller, Robert C.

J. A. Giordmaine, Robert C. Miller, “Tunable coherent parametric oscillation in LiNbO3at optical frequencies,” Phys. Rev. Lett. 14, 973–976 (1965).
[CrossRef]

Miyake, C. I.

C. I. Miyake, F. Braun, D. L. Guyer, “High-efficiency synchronously pumped degenerate KTP optical parametric oscillator,” in Advanced Solid State Lasers, L. L. Chase, A. A. Pinto, eds., Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1992), pp. 350–352.

Oshman, M. K.

E. O. Ammann, M. K. Oshman, J. D. Foster, J. M. Yarborough, “Repetitively pumped optical parametric oscillator at 2.13 μ m,” Appl. Phys. Lett. 15, 131–133 (1969).
[CrossRef]

Piskarkas, A.

K. Burneika, M. Ignatavicius, V. Kabelka, A. Piskarkas, A. Stabinis, “Parametric light amplification and oscillation in KDP with mode-locked pump,” IEEE J. Quantum Electron. QE-8, 574 (1972).
[CrossRef]

Siegman, A. E.

A. E. Siegman, “New developments in laser resonators,” in Optical Resonators, D. A. Holmes, ed., Proc. Soc. Photo-Opt. Instrum. Eng.1224, 2–14 (1990).
[CrossRef]

Stabinis, A.

K. Burneika, M. Ignatavicius, V. Kabelka, A. Piskarkas, A. Stabinis, “Parametric light amplification and oscillation in KDP with mode-locked pump,” IEEE J. Quantum Electron. QE-8, 574 (1972).
[CrossRef]

Yarborough, J. M.

E. O. Ammann, M. K. Oshman, J. D. Foster, J. M. Yarborough, “Repetitively pumped optical parametric oscillator at 2.13 μ m,” Appl. Phys. Lett. 15, 131–133 (1969).
[CrossRef]

Appl. Phys. Lett.

E. O. Ammann, M. K. Oshman, J. D. Foster, J. M. Yarborough, “Repetitively pumped optical parametric oscillator at 2.13 μ m,” Appl. Phys. Lett. 15, 131–133 (1969).
[CrossRef]

IEEE J. Quantum Electron.

K. Burneika, M. Ignatavicius, V. Kabelka, A. Piskarkas, A. Stabinis, “Parametric light amplification and oscillation in KDP with mode-locked pump,” IEEE J. Quantum Electron. QE-8, 574 (1972).
[CrossRef]

D. Eimerl, “High average power harmonic generation,” IEEE J. Quantum Electron. QE-23, 575–592 (1987).
[CrossRef]

Opt. Commun.

L. J. Bromley, A. Guy, D. C. Hanna, “Synchronously pumped optical parametric oscillation in beta-barium borate,” Opt. Commun. 67, 316–320 (1988).
[CrossRef]

Phys. Rev. Lett.

J. A. Giordmaine, Robert C. Miller, “Tunable coherent parametric oscillation in LiNbO3at optical frequencies,” Phys. Rev. Lett. 14, 973–976 (1965).
[CrossRef]

Proc. IRE

R. H. Kingston, “Parametric amplification and oscillation at optical frequencies,” Proc. IRE 50, 472 (1962).

Other

A. E. Siegman, “New developments in laser resonators,” in Optical Resonators, D. A. Holmes, ed., Proc. Soc. Photo-Opt. Instrum. Eng.1224, 2–14 (1990).
[CrossRef]

C. I. Miyake, F. Braun, D. L. Guyer, “High-efficiency synchronously pumped degenerate KTP optical parametric oscillator,” in Advanced Solid State Lasers, L. L. Chase, A. A. Pinto, eds., Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1992), pp. 350–352.

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Figures (5)

Fig. 1
Fig. 1

Typical mode-locked Q-switched pulse train taken at a 4.25-kHz repetition rate. The shutter-opening time was ~1.5 s. The temporal resolution was limited by the detection electronics.

Fig. 2
Fig. 2

Spot size of the beam, after it passed through the amplifier, through a waist created by a 1100-mm focal-length lens. The experimental data points are the average of the two semiaxes of the slightly elliptical intensity distribution. The solid curve is a least-squares fit with M2 = 0.84 and a waist of 0.18 mm.

Fig. 3
Fig. 3

Configuration of the KTiOPO4 (KTP) OPO resonator. The output coupler had a reflectivity of 12% at the degenerate wavelength. The optical length from the rear mirror to the output coupler was 197 cm. HR, highly reflective; T, transmission; mcc, meters concave curvature.

Fig. 4
Fig. 4

Projections onto the two principal axes of the pump beam in the OPO resonator near the output coupler, showing the residual ellipticity and the overall smooth Gaussian shape. The size of the pixels used for the horizontal axis was 28 μm. Because of an offset of a few channels in the digitizing electronics of the charge-injection-device camera readout, both curves have a slight negative offset and are clipped at the zero level.

Fig. 5
Fig. 5

Output power and conversion efficiency of the KTP OPO as a function of pump power injected into the OPO resonator. In another run a maximum of 14 W was generated with a pump power of 52 W (data point not shown).

Equations (1)

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w 2 ( z ) = w 0 2 + M 4 λ 2 π 2 w 0 2 ( z z 0 ) 2 .

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