Abstract

A theoretical analysis and an experimental study are presented on the phase-matching condition of noncollinearly pumped optical parametric oscillators (OPO’s) based on a noncritical phase-matching potassium titanyl phosphate (KTP) OPO. It is shown that noncollinearly pumped, double-pass, singly resonant optical parametric oscillators maintain the advantage of round-trip parametric gain in a collinear pump, since in this case the two generated signal waves are coherent, which results in high conversion efficiency and low pump threshold. With this KTP OPO we achieved 31% energy conversion efficiency from a 1064-nm pump wave to 1572-nm eye-safe output. In addition, because the incident pump beam is not perpendicular to the OPO cavity mirrors and consequently no reflected beam flows back into the pump source, we can avoid employing optical isolators.

© 1999 Optical Society of America

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References

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  1. L. R. Marshall, A. D. Hays, J. Kasinski, R. L. Burnham, “Highly efficient optical parametric oscillators,” in Eyesafe Lasers: Components, Systems, and Applications, A. M. Johnson, ed., Proc. SPIE1419, 141–152 (1991).
  2. G. A. Grabon, W. L. Moon, G. A. Witt, L. G. Jones, “Solid-state eyesafe converter for multimode YAG lasers,” in Nonlinear Optics for High-Speed Electronics and Optical Frequency, N. Peygambarian, H. Everitt, R. C. Eckardt, D. D. Lowenthal, eds., Proc. SPIE2145, 299–308 (1994).
    [CrossRef]
  3. L. R. Marshall, J. Kasinski, R. L. Burnham, “Diode-pumped eye-safe laser source exceeding 1% efficiency,” Opt. Lett. 16, 1680–1682 (1991).
    [CrossRef] [PubMed]
  4. J. E. Bjorkholm, A. Ashkin, R. G. Smith, “Improvement of optical parametric oscillators by nonresonant pump reflection,” IEEE J. Quantum Electron. QE-6, 797–799 (1970).
    [CrossRef]
  5. S. J. Brosnan, R. L. Byer, “Optical parametric oscillator threshold and linewidth studies,” IEEE J. Quantum Electron. QE-15, 415–431 (1979).
    [CrossRef]
  6. R. A. Baumgartner, R. L. Byer, “Optical parametric amplification,” IEEE J. Quantum Electron. QE-15, 432–444 (1979).
    [CrossRef]

1991 (1)

1979 (2)

S. J. Brosnan, R. L. Byer, “Optical parametric oscillator threshold and linewidth studies,” IEEE J. Quantum Electron. QE-15, 415–431 (1979).
[CrossRef]

R. A. Baumgartner, R. L. Byer, “Optical parametric amplification,” IEEE J. Quantum Electron. QE-15, 432–444 (1979).
[CrossRef]

1970 (1)

J. E. Bjorkholm, A. Ashkin, R. G. Smith, “Improvement of optical parametric oscillators by nonresonant pump reflection,” IEEE J. Quantum Electron. QE-6, 797–799 (1970).
[CrossRef]

Ashkin, A.

J. E. Bjorkholm, A. Ashkin, R. G. Smith, “Improvement of optical parametric oscillators by nonresonant pump reflection,” IEEE J. Quantum Electron. QE-6, 797–799 (1970).
[CrossRef]

Baumgartner, R. A.

R. A. Baumgartner, R. L. Byer, “Optical parametric amplification,” IEEE J. Quantum Electron. QE-15, 432–444 (1979).
[CrossRef]

Bjorkholm, J. E.

J. E. Bjorkholm, A. Ashkin, R. G. Smith, “Improvement of optical parametric oscillators by nonresonant pump reflection,” IEEE J. Quantum Electron. QE-6, 797–799 (1970).
[CrossRef]

Brosnan, S. J.

S. J. Brosnan, R. L. Byer, “Optical parametric oscillator threshold and linewidth studies,” IEEE J. Quantum Electron. QE-15, 415–431 (1979).
[CrossRef]

Burnham, R. L.

L. R. Marshall, J. Kasinski, R. L. Burnham, “Diode-pumped eye-safe laser source exceeding 1% efficiency,” Opt. Lett. 16, 1680–1682 (1991).
[CrossRef] [PubMed]

L. R. Marshall, A. D. Hays, J. Kasinski, R. L. Burnham, “Highly efficient optical parametric oscillators,” in Eyesafe Lasers: Components, Systems, and Applications, A. M. Johnson, ed., Proc. SPIE1419, 141–152 (1991).

Byer, R. L.

S. J. Brosnan, R. L. Byer, “Optical parametric oscillator threshold and linewidth studies,” IEEE J. Quantum Electron. QE-15, 415–431 (1979).
[CrossRef]

R. A. Baumgartner, R. L. Byer, “Optical parametric amplification,” IEEE J. Quantum Electron. QE-15, 432–444 (1979).
[CrossRef]

Grabon, G. A.

G. A. Grabon, W. L. Moon, G. A. Witt, L. G. Jones, “Solid-state eyesafe converter for multimode YAG lasers,” in Nonlinear Optics for High-Speed Electronics and Optical Frequency, N. Peygambarian, H. Everitt, R. C. Eckardt, D. D. Lowenthal, eds., Proc. SPIE2145, 299–308 (1994).
[CrossRef]

Hays, A. D.

L. R. Marshall, A. D. Hays, J. Kasinski, R. L. Burnham, “Highly efficient optical parametric oscillators,” in Eyesafe Lasers: Components, Systems, and Applications, A. M. Johnson, ed., Proc. SPIE1419, 141–152 (1991).

Jones, L. G.

G. A. Grabon, W. L. Moon, G. A. Witt, L. G. Jones, “Solid-state eyesafe converter for multimode YAG lasers,” in Nonlinear Optics for High-Speed Electronics and Optical Frequency, N. Peygambarian, H. Everitt, R. C. Eckardt, D. D. Lowenthal, eds., Proc. SPIE2145, 299–308 (1994).
[CrossRef]

Kasinski, J.

L. R. Marshall, J. Kasinski, R. L. Burnham, “Diode-pumped eye-safe laser source exceeding 1% efficiency,” Opt. Lett. 16, 1680–1682 (1991).
[CrossRef] [PubMed]

L. R. Marshall, A. D. Hays, J. Kasinski, R. L. Burnham, “Highly efficient optical parametric oscillators,” in Eyesafe Lasers: Components, Systems, and Applications, A. M. Johnson, ed., Proc. SPIE1419, 141–152 (1991).

Marshall, L. R.

L. R. Marshall, J. Kasinski, R. L. Burnham, “Diode-pumped eye-safe laser source exceeding 1% efficiency,” Opt. Lett. 16, 1680–1682 (1991).
[CrossRef] [PubMed]

L. R. Marshall, A. D. Hays, J. Kasinski, R. L. Burnham, “Highly efficient optical parametric oscillators,” in Eyesafe Lasers: Components, Systems, and Applications, A. M. Johnson, ed., Proc. SPIE1419, 141–152 (1991).

Moon, W. L.

G. A. Grabon, W. L. Moon, G. A. Witt, L. G. Jones, “Solid-state eyesafe converter for multimode YAG lasers,” in Nonlinear Optics for High-Speed Electronics and Optical Frequency, N. Peygambarian, H. Everitt, R. C. Eckardt, D. D. Lowenthal, eds., Proc. SPIE2145, 299–308 (1994).
[CrossRef]

Smith, R. G.

J. E. Bjorkholm, A. Ashkin, R. G. Smith, “Improvement of optical parametric oscillators by nonresonant pump reflection,” IEEE J. Quantum Electron. QE-6, 797–799 (1970).
[CrossRef]

Witt, G. A.

G. A. Grabon, W. L. Moon, G. A. Witt, L. G. Jones, “Solid-state eyesafe converter for multimode YAG lasers,” in Nonlinear Optics for High-Speed Electronics and Optical Frequency, N. Peygambarian, H. Everitt, R. C. Eckardt, D. D. Lowenthal, eds., Proc. SPIE2145, 299–308 (1994).
[CrossRef]

IEEE J. Quantum Electron. (3)

J. E. Bjorkholm, A. Ashkin, R. G. Smith, “Improvement of optical parametric oscillators by nonresonant pump reflection,” IEEE J. Quantum Electron. QE-6, 797–799 (1970).
[CrossRef]

S. J. Brosnan, R. L. Byer, “Optical parametric oscillator threshold and linewidth studies,” IEEE J. Quantum Electron. QE-15, 415–431 (1979).
[CrossRef]

R. A. Baumgartner, R. L. Byer, “Optical parametric amplification,” IEEE J. Quantum Electron. QE-15, 432–444 (1979).
[CrossRef]

Opt. Lett. (1)

Other (2)

L. R. Marshall, A. D. Hays, J. Kasinski, R. L. Burnham, “Highly efficient optical parametric oscillators,” in Eyesafe Lasers: Components, Systems, and Applications, A. M. Johnson, ed., Proc. SPIE1419, 141–152 (1991).

G. A. Grabon, W. L. Moon, G. A. Witt, L. G. Jones, “Solid-state eyesafe converter for multimode YAG lasers,” in Nonlinear Optics for High-Speed Electronics and Optical Frequency, N. Peygambarian, H. Everitt, R. C. Eckardt, D. D. Lowenthal, eds., Proc. SPIE2145, 299–308 (1994).
[CrossRef]

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Figures (5)

Fig. 1
Fig. 1

Wave-vector diagrams showing phase matching in a collinear and a noncollinear pump. The signal with a frequency shift Δω10 can be phase matched with both the incident and the reflected pump waves.

Fig. 2
Fig. 2

Experimental layout: M2 is the output coupler of either the SRO or the DSRO. In spectra investigation the pump is reflected by M3 in different directions.

Fig. 3
Fig. 3

Spectra of the output signal wave with different directions of the reflected pump beam. q is the angle between the cavity axis and the incident pump beam and, r is the angle between the cavity axis and the reflected pump beam.

Fig. 4
Fig. 4

Output energy versus pump energy profiles for the single-line and the dual-line DSRO’s. The output energy of the SRO is also shown for comparison.

Fig. 5
Fig. 5

Signal energy versus pump energy profiles for SRO (S) and DSRO (D) with the noncollinear angles of 10 mrad and less than 1 mrad.

Equations (4)

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ΔK=gq2-Δn2ω2/c-bΔω1,
g=k1k3/2k2,Δn2=n2θθmθ0+122n2n2θmθ02,b=k1ω1-k2ω2n1-n2/c,
ΔK=gq2-Δn2ω2/c-bΔω10=0.
gq2-bΔω10=0.

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