Abstract

KNbO3 has been found to be phase matchable for type 1 second-harmonic generation up to 2.4 µm at 22 °C. The improved Sellmeier equations that correctly reproduce the nonlinear experiments thus far reported in the literature and our new experimental results for harmonic generation of CO2 laser harmonics between 3.5303 and 5.2955 µm are presented.

© 1999 Optical Society of America

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References

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  1. B. Zysset, I. Biaggio, P. Gunter, “Refractive indices of orthorhombic KNbO3. I. Dispersion and temperature dependence,” J. Opt. Soc. Am. B 9, 380–386 (1992).
    [CrossRef]
  2. I. Biaggio, P. Kerkoc, L. S. Wu, P. Gunter, B. Zysset, “Refractive indices of orthorombic KNbO3. II. Phase-matching configurations for nonlinear-optical interactions,” J. Opt. Soc. Am. B 9, 507–517 (1992).
    [CrossRef]
  3. D. H. Jundt, P. Gunter, B. Zysset, “A temperature-dependent dispersion equation for KNbO3,” Nonlinear Opt. 4, 341–345 (1993).
  4. G. Ghosh, “Dispersion of thermo-optic coefficients in a potassium niobate nonlinear crystal,” Appl. Phys. Lett. 65, 3311–3313 (1994).
    [CrossRef]
  5. Crystals and Materials Laser Accessories, data sheet, Casix, Inc., Fujian, China.
  6. W. R. Bosenberg, R. H. Jarman, “Type-II phase-matched KNbO3 optical parametric oscillator,” Opt. Lett. 18, 1323–1325 (1993).
    [CrossRef]
  7. A. Fix, R. Urschel, G. Goeritz, A. Borsutzky, R. Wallenstein, “Single-mode BBO/KNB optical parametric oscillator-amplifier system, broadly tunable from the visible (0.4 µm) to the infrared (4 µm),” in Conference on Lasers and Electro-Optics, Vol. 8 of 1994 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1994), paper CWE3.
  8. D. E. Spence, S. Wielandy, C. L. Tang, C. Bosshard, P. Gunter, “High-repetition-rate femtosecond optical parametric oscillator based on KNbO3,” Opt. Lett. 20, 680–682 (1995).
    [CrossRef] [PubMed]
  9. V. Petrov, F. Noack, “Mid-infrared femtosecond optical parametric amplification in potassium niobate,” Opt. Lett. 21, 576–578 (1996).
    [CrossRef]
  10. P. Rambaldi, M. Douard, B. Vezin, J. P. Wolf, D. Rytz, “Broadly tunable KNbO3 OPOs pumped by Ti:sapphire lasers,” Opt. Commun. 142, 262–264 (1997).
    [CrossRef]
  11. Y. Uematsu, “Nonlinear optical properties of KNbO3 single crystals in the orthorombic phase,” Jpn. J. Appl. Phys. 13, 1362–1368 (1974).
    [CrossRef]
  12. W. P. Risk, R. Pon, W. Lenth, “Diode laser pumped blue-light source at 473 nm using intracavity frequency doubling of a 946 nm Nd:YAG laser,” Appl. Phys. Lett. 54, 1625–1627 (1989).
    [CrossRef]

1997 (1)

P. Rambaldi, M. Douard, B. Vezin, J. P. Wolf, D. Rytz, “Broadly tunable KNbO3 OPOs pumped by Ti:sapphire lasers,” Opt. Commun. 142, 262–264 (1997).
[CrossRef]

1996 (1)

1995 (1)

1994 (1)

G. Ghosh, “Dispersion of thermo-optic coefficients in a potassium niobate nonlinear crystal,” Appl. Phys. Lett. 65, 3311–3313 (1994).
[CrossRef]

1993 (2)

W. R. Bosenberg, R. H. Jarman, “Type-II phase-matched KNbO3 optical parametric oscillator,” Opt. Lett. 18, 1323–1325 (1993).
[CrossRef]

D. H. Jundt, P. Gunter, B. Zysset, “A temperature-dependent dispersion equation for KNbO3,” Nonlinear Opt. 4, 341–345 (1993).

1992 (2)

1989 (1)

W. P. Risk, R. Pon, W. Lenth, “Diode laser pumped blue-light source at 473 nm using intracavity frequency doubling of a 946 nm Nd:YAG laser,” Appl. Phys. Lett. 54, 1625–1627 (1989).
[CrossRef]

1974 (1)

Y. Uematsu, “Nonlinear optical properties of KNbO3 single crystals in the orthorombic phase,” Jpn. J. Appl. Phys. 13, 1362–1368 (1974).
[CrossRef]

Biaggio, I.

Borsutzky, A.

A. Fix, R. Urschel, G. Goeritz, A. Borsutzky, R. Wallenstein, “Single-mode BBO/KNB optical parametric oscillator-amplifier system, broadly tunable from the visible (0.4 µm) to the infrared (4 µm),” in Conference on Lasers and Electro-Optics, Vol. 8 of 1994 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1994), paper CWE3.

Bosenberg, W. R.

Bosshard, C.

Douard, M.

P. Rambaldi, M. Douard, B. Vezin, J. P. Wolf, D. Rytz, “Broadly tunable KNbO3 OPOs pumped by Ti:sapphire lasers,” Opt. Commun. 142, 262–264 (1997).
[CrossRef]

Fix, A.

A. Fix, R. Urschel, G. Goeritz, A. Borsutzky, R. Wallenstein, “Single-mode BBO/KNB optical parametric oscillator-amplifier system, broadly tunable from the visible (0.4 µm) to the infrared (4 µm),” in Conference on Lasers and Electro-Optics, Vol. 8 of 1994 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1994), paper CWE3.

Ghosh, G.

G. Ghosh, “Dispersion of thermo-optic coefficients in a potassium niobate nonlinear crystal,” Appl. Phys. Lett. 65, 3311–3313 (1994).
[CrossRef]

Goeritz, G.

A. Fix, R. Urschel, G. Goeritz, A. Borsutzky, R. Wallenstein, “Single-mode BBO/KNB optical parametric oscillator-amplifier system, broadly tunable from the visible (0.4 µm) to the infrared (4 µm),” in Conference on Lasers and Electro-Optics, Vol. 8 of 1994 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1994), paper CWE3.

Gunter, P.

Jarman, R. H.

Jundt, D. H.

D. H. Jundt, P. Gunter, B. Zysset, “A temperature-dependent dispersion equation for KNbO3,” Nonlinear Opt. 4, 341–345 (1993).

Kerkoc, P.

Lenth, W.

W. P. Risk, R. Pon, W. Lenth, “Diode laser pumped blue-light source at 473 nm using intracavity frequency doubling of a 946 nm Nd:YAG laser,” Appl. Phys. Lett. 54, 1625–1627 (1989).
[CrossRef]

Noack, F.

Petrov, V.

Pon, R.

W. P. Risk, R. Pon, W. Lenth, “Diode laser pumped blue-light source at 473 nm using intracavity frequency doubling of a 946 nm Nd:YAG laser,” Appl. Phys. Lett. 54, 1625–1627 (1989).
[CrossRef]

Rambaldi, P.

P. Rambaldi, M. Douard, B. Vezin, J. P. Wolf, D. Rytz, “Broadly tunable KNbO3 OPOs pumped by Ti:sapphire lasers,” Opt. Commun. 142, 262–264 (1997).
[CrossRef]

Risk, W. P.

W. P. Risk, R. Pon, W. Lenth, “Diode laser pumped blue-light source at 473 nm using intracavity frequency doubling of a 946 nm Nd:YAG laser,” Appl. Phys. Lett. 54, 1625–1627 (1989).
[CrossRef]

Rytz, D.

P. Rambaldi, M. Douard, B. Vezin, J. P. Wolf, D. Rytz, “Broadly tunable KNbO3 OPOs pumped by Ti:sapphire lasers,” Opt. Commun. 142, 262–264 (1997).
[CrossRef]

Spence, D. E.

Tang, C. L.

Uematsu, Y.

Y. Uematsu, “Nonlinear optical properties of KNbO3 single crystals in the orthorombic phase,” Jpn. J. Appl. Phys. 13, 1362–1368 (1974).
[CrossRef]

Urschel, R.

A. Fix, R. Urschel, G. Goeritz, A. Borsutzky, R. Wallenstein, “Single-mode BBO/KNB optical parametric oscillator-amplifier system, broadly tunable from the visible (0.4 µm) to the infrared (4 µm),” in Conference on Lasers and Electro-Optics, Vol. 8 of 1994 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1994), paper CWE3.

Vezin, B.

P. Rambaldi, M. Douard, B. Vezin, J. P. Wolf, D. Rytz, “Broadly tunable KNbO3 OPOs pumped by Ti:sapphire lasers,” Opt. Commun. 142, 262–264 (1997).
[CrossRef]

Wallenstein, R.

A. Fix, R. Urschel, G. Goeritz, A. Borsutzky, R. Wallenstein, “Single-mode BBO/KNB optical parametric oscillator-amplifier system, broadly tunable from the visible (0.4 µm) to the infrared (4 µm),” in Conference on Lasers and Electro-Optics, Vol. 8 of 1994 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1994), paper CWE3.

Wielandy, S.

Wolf, J. P.

P. Rambaldi, M. Douard, B. Vezin, J. P. Wolf, D. Rytz, “Broadly tunable KNbO3 OPOs pumped by Ti:sapphire lasers,” Opt. Commun. 142, 262–264 (1997).
[CrossRef]

Wu, L. S.

Zysset, B.

Appl. Phys. Lett. (2)

G. Ghosh, “Dispersion of thermo-optic coefficients in a potassium niobate nonlinear crystal,” Appl. Phys. Lett. 65, 3311–3313 (1994).
[CrossRef]

W. P. Risk, R. Pon, W. Lenth, “Diode laser pumped blue-light source at 473 nm using intracavity frequency doubling of a 946 nm Nd:YAG laser,” Appl. Phys. Lett. 54, 1625–1627 (1989).
[CrossRef]

J. Opt. Soc. Am. B (2)

Jpn. J. Appl. Phys. (1)

Y. Uematsu, “Nonlinear optical properties of KNbO3 single crystals in the orthorombic phase,” Jpn. J. Appl. Phys. 13, 1362–1368 (1974).
[CrossRef]

Nonlinear Opt. (1)

D. H. Jundt, P. Gunter, B. Zysset, “A temperature-dependent dispersion equation for KNbO3,” Nonlinear Opt. 4, 341–345 (1993).

Opt. Commun. (1)

P. Rambaldi, M. Douard, B. Vezin, J. P. Wolf, D. Rytz, “Broadly tunable KNbO3 OPOs pumped by Ti:sapphire lasers,” Opt. Commun. 142, 262–264 (1997).
[CrossRef]

Opt. Lett. (3)

Other (2)

A. Fix, R. Urschel, G. Goeritz, A. Borsutzky, R. Wallenstein, “Single-mode BBO/KNB optical parametric oscillator-amplifier system, broadly tunable from the visible (0.4 µm) to the infrared (4 µm),” in Conference on Lasers and Electro-Optics, Vol. 8 of 1994 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1994), paper CWE3.

Crystals and Materials Laser Accessories, data sheet, Casix, Inc., Fujian, China.

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Figures (5)

Fig. 1
Fig. 1

IR transmission spectrum of a 5-mm-long, z-cut KNbO3 crystal. Reproduced from an original trace.

Fig. 2
Fig. 2

Phase-matching curves for type 1 SHG in the yz plane of KNbO3 at 22 ± 1 °C. The dashed curves (Z), (J), and (C) were calculated using the index formulas given by Zysset et al.,1 Jundt et al.,3 and Casix, Inc. data sheets,5 respectively. The solid curve (U) represents the calculations taken with our Sellmeier equations. The circles represent experimental points.

Fig. 3
Fig. 3

Phase-matching curves for type 1 SHG in the xy plane of KNbO3 at 22 ± 1 °C. The dashed curves (Z), (J), and (C) are the same as those defined in Fig. 2. The solid curve (U) represents the calculations taken with our Sellmeier equations. The circles represent experimental points.

Fig. 4
Fig. 4

Phase-matching curves for type 1 mixing of the second- and third-harmonic radiation of a TEA CO2 laser in the xy plane. The dashed curves (Z), (J), and (C) are the same as those defined in Fig. 2. The solid curve (U) represents the calculations taken with our Sellmeier equations. The circles represent experimental points.

Fig. 5
Fig. 5

Phase-matching curves for type 1 OPO in the zx plane of KNbO3 pumped by a Nd:YAG laser at 1.0642 µm. The dashed curves (Z), (J), and (C) are the same as those defined in Fig. 2. The solid curve (U) represents the calculations taken with our Sellmeier equations. The circles represent the experimental points quoted from Ref. 7.

Tables (3)

Tables Icon

Table 1 Absorption Coefficients of KNbO3 in the Mid-IR Region

Tables Icon

Table 2 Phase-Matching Conditions for Type 1 SHG and SFG in KNbO3 at 22 ± 1 °C

Tables Icon

Table 3 Measured and Fitted Refractive Indices of KNbO3 at 22 °C

Equations (1)

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nx2=4.4222+0.09972λ2-0.05496-0.01976λ2,ny2=4.8353+0.12808λ2-0.05674-0.02528λ2+1.8590×10-6λ4-1.0689×10-6λ6nz2=4.9856+0.15266λ2-0.06331-0.02831λ2+2.0754×10-6λ4-1.2131×10-6λ6,

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