Abstract

We present the design and characteristics of a KTiOPO4 singly resonant optical parametric oscillator synchronously pumped by the second harmonic of an additive-pulse mode-locked Nd:YLF laser. The pump pulses at the 527-nm wavelength have a pulse width of 4.5 ps, a repetition rate of 76 MHz, and an average power of as much as 4 W. Above the threshold of 900-mW average pump power, continuous tuning is demonstrated from 851 to 938 nm in the signal branch and from 1200 to 1381 nm in the idler branch. At three times the threshold, 3.2-ps signal pulses with an average power of 83 mW and 2.4-ps idler pulses with an average power of 280 mW are obtained. High-order transverse-mode characteristics and multiple-wavelength oscillation are also discussed.

© 1995 Optical Society of America

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  1. A. Piskarskas, V. Smil’gyavichyus, and A. Umbrasas, “Continuous parametric generation of picosecond light pulses,” Sov. J. Quantum Electron. 18, 155–156 (1988).
    [CrossRef]
  2. D. C. Edelstein, E. S. Wachman, and C. L. Tang, “Broadly tunable high repetition rate femtosecond optical parametric oscillator,” Appl. Phys. Lett. 54, 1728–1730 (1989).
    [CrossRef]
  3. E. S. Wachman, D. C. Edelstein, and C. L. Tang, “Continuous-wave mode-locked and dispersion-compensated femtosecond optical parametric oscillator,” Opt. Lett. 15, 136–138 (1990).
    [CrossRef] [PubMed]
  4. E. S. Wachman, W. S. Pelouch, and C. L. Tang, “CW femtosecond pulses tunable in the near- and midinfrared,” J. Appl. Phys. 70, 1893–1895 (1991).
    [CrossRef]
  5. M. Ebrahimzadeh, G. P. A. Malcolm, and A. I. Ferguson, “Continuous-wave mode-locked optical parametric oscillator synchronously pumped by a diode-laser-pumped solid-state laser,” Opt. Lett. 17, 183–185 (1992).
    [CrossRef] [PubMed]
  6. G. Mak, Q. Fu, and H. M. van Driel, “Externally pumped high repetition rate femtosecond infrared optical parametric oscillator,” Appl. Phys. Lett. 60, 542–544 (1992).
    [CrossRef]
  7. M. J. McCarthy and D. C. Hanna, “Continuous-wave mode-locked singly resonant optical parametric oscillator synchronously pumped by a laser-diode-pumped Nd:YLF laser,” Opt. Lett. 17, 402–404 (1992).
    [CrossRef] [PubMed]
  8. Q. Fu, G. Mak, and H. M. van Driel, “High-power, 62-fs infrared optical parametric oscillator synchronously pumped by a 76-MHz Ti:sapphire laser,” Opt. Lett. 17, 1006–1008 (1992).
    [CrossRef] [PubMed]
  9. W. S. Pelouch, P. E. Powers, and C. L. Tang, “Ti:sapphire-pumped, high-repetition-rate femtosecond optical parametric oscillator,” Opt. Lett. 17, 1070–1072 (1992).
    [CrossRef] [PubMed]
  10. P. E. Powers, S. Ramakrishna, C. L. Tang, and L. K. Cheng, “Optical parametric oscillation with KTiOAsO4,” Opt. Lett. 18, 1171–1173 (1993).
    [CrossRef] [PubMed]
  11. S. D. Butterworth, M. J. McCarthy, and D. C. Hanna, “Widely tunable synchronously pumped optical parametric oscillator,” Opt. Lett. 18, 1429–1431 (1993).
    [CrossRef] [PubMed]
  12. P. E. Powers, R. J. Ellingson, W. S. Pelouch, and C. L. Tang, “Recent advances of the Ti:sapphire-pumped-high-repetition-rate femtosecond optical parametric oscillator,” J. Opt. Soc. Am. B 10, 2162–2167 (1993).
    [CrossRef]
  13. G. J. Hall, M. Ebrahimzadeh, G. P. Malcolm, and A. I. Ferguson, “Synchronously pumped optical parametric oscillators using all-solid-state pump lasers,” J. Opt. Soc. Am. B 10, 2168–2179 (1993).
    [CrossRef]
  14. M. J. McCarthy and D. C. Hanna, “All-solid-state synchronously pumped optical parametric oscillator,” J. Opt. Soc. Am. B 10, 2180–2190 (1993).
    [CrossRef]
  15. A. Nebel, C. Fallnich, R. Beigang, and R. Wallenstein, “Noncritically phase-matched continuous-wave mode-locked singly resonant optical parametric oscillator synchronously pumped by a Ti:sapphire laser,” J. Opt. Soc. Am. B 10, 2195–2200 (1993).
    [CrossRef]
  16. J. Chung and A. E. Siegman, “Singly resonant continuous-wave mode-locked KTiOPO4optical parametric oscillator pumped by Nd:YAG laser,” J. Opt. Soc. Am. B 10, 2201–2210 (1993).
    [CrossRef]
  17. Ch. Grässer, D. Wang, R. Beigang, and R. Wallenstain, “Singly resonant optical parametric oscillator of KTiOPO4synchronously pumped by the radiation of a continuous-wave mode-locked Nd:YLF laser,” J. Opt. Soc. Am. B 10, 2218–2221 (1993).
    [CrossRef]
  18. J. M. Dudley, D. T. Reid, M. Ebrahimzadeh, and W. Sibbett, “Characteristics of a non-critically phase-matched Ti:sapphire pumped femtosecond optical parametric oscillator,” Opt. Commun. 104, 419–430 (1994).
    [CrossRef]
  19. P. E. Powers, C. L. Tang, and L. K. Cheng, “High-repetition-rate femtosecond optical parametric oscillator based on CsTiOAsO4,” Opt. Lett. 19, 37–39 (1994).
    [CrossRef] [PubMed]
  20. A. Robertson and A. J. Ferguson, “Synchronously pumped all-solid-state lithium triborate optical parametric oscillator in a ring configuration,” Opt. Lett. 19, 117–119 (1994).
    [CrossRef] [PubMed]
  21. T. J. Driscoll, G. M. Gale, and F. Hache, “Ti:sapphire second harmonic pumped visible range femtosecond optical parametric oscillator,” Opt. Commun. 110, 638–644 (1994).
    [CrossRef]
  22. E. C. Cheung, K. Koch, and G. T. Moore, “Silver thiogallate, singly resonant optical parametric oscillator pumped by a continuous-wave mode-locked Nd:YAG laser,” Opt. Lett. 19, 631–633 (1994).
    [CrossRef] [PubMed]
  23. E. C. Cheung and J. M. Liu, “Theory of a synchronously pumped optical parametric oscillator in steady-state operation,” J. Opt. Soc. Am. B 7, 1385–1401 (1990).
    [CrossRef]
  24. E. C. Cheung and J. M. Liu, “Efficient generation of ultrashort, wavelength-tunable infrared pulses,” J. Opt. Soc. Am. B 8, 1491–1506 (1991).
    [CrossRef]
  25. J. M. Liu and J. K. Chee, “Passive mode locking of a cw Nd:YLF laser with a nonlinear external coupled cavity,” Opt. Lett. 15, 685–687 (1990).
    [CrossRef] [PubMed]
  26. J. D. Bierlein and H. Vanherzeele, “Potassium titanyl phosphate: properties and new applications,” J. Opt. Soc. Am. B 6, 622–633 (1989).
    [CrossRef]
  27. E. C. Cheung, K. Koch, G. T. Moore, and J. M. Liu, “Measurements of second-order nonlinear optical coefficients from the spectral brightness of parametric fluorescence,” Opt. Lett. 19, 168–170 (1994).
    [CrossRef] [PubMed]
  28. J. M. Liu, G. Zhou, and S. J. Pyo, “Parametric gain of the generation and the amplification of ultrashort optical pulses,” J. Opt. Soc. Am. B 12, 2274–2287 (1995).
    [CrossRef]

1995 (1)

1994 (6)

1993 (8)

P. E. Powers, S. Ramakrishna, C. L. Tang, and L. K. Cheng, “Optical parametric oscillation with KTiOAsO4,” Opt. Lett. 18, 1171–1173 (1993).
[CrossRef] [PubMed]

S. D. Butterworth, M. J. McCarthy, and D. C. Hanna, “Widely tunable synchronously pumped optical parametric oscillator,” Opt. Lett. 18, 1429–1431 (1993).
[CrossRef] [PubMed]

P. E. Powers, R. J. Ellingson, W. S. Pelouch, and C. L. Tang, “Recent advances of the Ti:sapphire-pumped-high-repetition-rate femtosecond optical parametric oscillator,” J. Opt. Soc. Am. B 10, 2162–2167 (1993).
[CrossRef]

G. J. Hall, M. Ebrahimzadeh, G. P. Malcolm, and A. I. Ferguson, “Synchronously pumped optical parametric oscillators using all-solid-state pump lasers,” J. Opt. Soc. Am. B 10, 2168–2179 (1993).
[CrossRef]

M. J. McCarthy and D. C. Hanna, “All-solid-state synchronously pumped optical parametric oscillator,” J. Opt. Soc. Am. B 10, 2180–2190 (1993).
[CrossRef]

A. Nebel, C. Fallnich, R. Beigang, and R. Wallenstein, “Noncritically phase-matched continuous-wave mode-locked singly resonant optical parametric oscillator synchronously pumped by a Ti:sapphire laser,” J. Opt. Soc. Am. B 10, 2195–2200 (1993).
[CrossRef]

J. Chung and A. E. Siegman, “Singly resonant continuous-wave mode-locked KTiOPO4optical parametric oscillator pumped by Nd:YAG laser,” J. Opt. Soc. Am. B 10, 2201–2210 (1993).
[CrossRef]

Ch. Grässer, D. Wang, R. Beigang, and R. Wallenstain, “Singly resonant optical parametric oscillator of KTiOPO4synchronously pumped by the radiation of a continuous-wave mode-locked Nd:YLF laser,” J. Opt. Soc. Am. B 10, 2218–2221 (1993).
[CrossRef]

1992 (5)

1991 (2)

E. S. Wachman, W. S. Pelouch, and C. L. Tang, “CW femtosecond pulses tunable in the near- and midinfrared,” J. Appl. Phys. 70, 1893–1895 (1991).
[CrossRef]

E. C. Cheung and J. M. Liu, “Efficient generation of ultrashort, wavelength-tunable infrared pulses,” J. Opt. Soc. Am. B 8, 1491–1506 (1991).
[CrossRef]

1990 (3)

1989 (2)

D. C. Edelstein, E. S. Wachman, and C. L. Tang, “Broadly tunable high repetition rate femtosecond optical parametric oscillator,” Appl. Phys. Lett. 54, 1728–1730 (1989).
[CrossRef]

J. D. Bierlein and H. Vanherzeele, “Potassium titanyl phosphate: properties and new applications,” J. Opt. Soc. Am. B 6, 622–633 (1989).
[CrossRef]

1988 (1)

A. Piskarskas, V. Smil’gyavichyus, and A. Umbrasas, “Continuous parametric generation of picosecond light pulses,” Sov. J. Quantum Electron. 18, 155–156 (1988).
[CrossRef]

Beigang, R.

Bierlein, J. D.

Butterworth, S. D.

Chee, J. K.

Cheng, L. K.

Cheung, E. C.

Chung, J.

Driscoll, T. J.

T. J. Driscoll, G. M. Gale, and F. Hache, “Ti:sapphire second harmonic pumped visible range femtosecond optical parametric oscillator,” Opt. Commun. 110, 638–644 (1994).
[CrossRef]

Dudley, J. M.

J. M. Dudley, D. T. Reid, M. Ebrahimzadeh, and W. Sibbett, “Characteristics of a non-critically phase-matched Ti:sapphire pumped femtosecond optical parametric oscillator,” Opt. Commun. 104, 419–430 (1994).
[CrossRef]

Ebrahimzadeh, M.

Edelstein, D. C.

E. S. Wachman, D. C. Edelstein, and C. L. Tang, “Continuous-wave mode-locked and dispersion-compensated femtosecond optical parametric oscillator,” Opt. Lett. 15, 136–138 (1990).
[CrossRef] [PubMed]

D. C. Edelstein, E. S. Wachman, and C. L. Tang, “Broadly tunable high repetition rate femtosecond optical parametric oscillator,” Appl. Phys. Lett. 54, 1728–1730 (1989).
[CrossRef]

Ellingson, R. J.

Fallnich, C.

Ferguson, A. I.

Ferguson, A. J.

Fu, Q.

Q. Fu, G. Mak, and H. M. van Driel, “High-power, 62-fs infrared optical parametric oscillator synchronously pumped by a 76-MHz Ti:sapphire laser,” Opt. Lett. 17, 1006–1008 (1992).
[CrossRef] [PubMed]

G. Mak, Q. Fu, and H. M. van Driel, “Externally pumped high repetition rate femtosecond infrared optical parametric oscillator,” Appl. Phys. Lett. 60, 542–544 (1992).
[CrossRef]

Gale, G. M.

T. J. Driscoll, G. M. Gale, and F. Hache, “Ti:sapphire second harmonic pumped visible range femtosecond optical parametric oscillator,” Opt. Commun. 110, 638–644 (1994).
[CrossRef]

Grässer, Ch.

Hache, F.

T. J. Driscoll, G. M. Gale, and F. Hache, “Ti:sapphire second harmonic pumped visible range femtosecond optical parametric oscillator,” Opt. Commun. 110, 638–644 (1994).
[CrossRef]

Hall, G. J.

Hanna, D. C.

Koch, K.

Liu, J. M.

Mak, G.

Q. Fu, G. Mak, and H. M. van Driel, “High-power, 62-fs infrared optical parametric oscillator synchronously pumped by a 76-MHz Ti:sapphire laser,” Opt. Lett. 17, 1006–1008 (1992).
[CrossRef] [PubMed]

G. Mak, Q. Fu, and H. M. van Driel, “Externally pumped high repetition rate femtosecond infrared optical parametric oscillator,” Appl. Phys. Lett. 60, 542–544 (1992).
[CrossRef]

Malcolm, G. P.

Malcolm, G. P. A.

McCarthy, M. J.

Moore, G. T.

Nebel, A.

Pelouch, W. S.

Piskarskas, A.

A. Piskarskas, V. Smil’gyavichyus, and A. Umbrasas, “Continuous parametric generation of picosecond light pulses,” Sov. J. Quantum Electron. 18, 155–156 (1988).
[CrossRef]

Powers, P. E.

Pyo, S. J.

Ramakrishna, S.

Reid, D. T.

J. M. Dudley, D. T. Reid, M. Ebrahimzadeh, and W. Sibbett, “Characteristics of a non-critically phase-matched Ti:sapphire pumped femtosecond optical parametric oscillator,” Opt. Commun. 104, 419–430 (1994).
[CrossRef]

Robertson, A.

Sibbett, W.

J. M. Dudley, D. T. Reid, M. Ebrahimzadeh, and W. Sibbett, “Characteristics of a non-critically phase-matched Ti:sapphire pumped femtosecond optical parametric oscillator,” Opt. Commun. 104, 419–430 (1994).
[CrossRef]

Siegman, A. E.

Smil’gyavichyus, V.

A. Piskarskas, V. Smil’gyavichyus, and A. Umbrasas, “Continuous parametric generation of picosecond light pulses,” Sov. J. Quantum Electron. 18, 155–156 (1988).
[CrossRef]

Tang, C. L.

Umbrasas, A.

A. Piskarskas, V. Smil’gyavichyus, and A. Umbrasas, “Continuous parametric generation of picosecond light pulses,” Sov. J. Quantum Electron. 18, 155–156 (1988).
[CrossRef]

van Driel, H. M.

G. Mak, Q. Fu, and H. M. van Driel, “Externally pumped high repetition rate femtosecond infrared optical parametric oscillator,” Appl. Phys. Lett. 60, 542–544 (1992).
[CrossRef]

Q. Fu, G. Mak, and H. M. van Driel, “High-power, 62-fs infrared optical parametric oscillator synchronously pumped by a 76-MHz Ti:sapphire laser,” Opt. Lett. 17, 1006–1008 (1992).
[CrossRef] [PubMed]

Vanherzeele, H.

Wachman, E. S.

E. S. Wachman, W. S. Pelouch, and C. L. Tang, “CW femtosecond pulses tunable in the near- and midinfrared,” J. Appl. Phys. 70, 1893–1895 (1991).
[CrossRef]

E. S. Wachman, D. C. Edelstein, and C. L. Tang, “Continuous-wave mode-locked and dispersion-compensated femtosecond optical parametric oscillator,” Opt. Lett. 15, 136–138 (1990).
[CrossRef] [PubMed]

D. C. Edelstein, E. S. Wachman, and C. L. Tang, “Broadly tunable high repetition rate femtosecond optical parametric oscillator,” Appl. Phys. Lett. 54, 1728–1730 (1989).
[CrossRef]

Wallenstain, R.

Wallenstein, R.

Wang, D.

Zhou, G.

Appl. Phys. Lett. (2)

D. C. Edelstein, E. S. Wachman, and C. L. Tang, “Broadly tunable high repetition rate femtosecond optical parametric oscillator,” Appl. Phys. Lett. 54, 1728–1730 (1989).
[CrossRef]

G. Mak, Q. Fu, and H. M. van Driel, “Externally pumped high repetition rate femtosecond infrared optical parametric oscillator,” Appl. Phys. Lett. 60, 542–544 (1992).
[CrossRef]

J. Appl. Phys. (1)

E. S. Wachman, W. S. Pelouch, and C. L. Tang, “CW femtosecond pulses tunable in the near- and midinfrared,” J. Appl. Phys. 70, 1893–1895 (1991).
[CrossRef]

J. Opt. Soc. Am. B (10)

P. E. Powers, R. J. Ellingson, W. S. Pelouch, and C. L. Tang, “Recent advances of the Ti:sapphire-pumped-high-repetition-rate femtosecond optical parametric oscillator,” J. Opt. Soc. Am. B 10, 2162–2167 (1993).
[CrossRef]

G. J. Hall, M. Ebrahimzadeh, G. P. Malcolm, and A. I. Ferguson, “Synchronously pumped optical parametric oscillators using all-solid-state pump lasers,” J. Opt. Soc. Am. B 10, 2168–2179 (1993).
[CrossRef]

M. J. McCarthy and D. C. Hanna, “All-solid-state synchronously pumped optical parametric oscillator,” J. Opt. Soc. Am. B 10, 2180–2190 (1993).
[CrossRef]

A. Nebel, C. Fallnich, R. Beigang, and R. Wallenstein, “Noncritically phase-matched continuous-wave mode-locked singly resonant optical parametric oscillator synchronously pumped by a Ti:sapphire laser,” J. Opt. Soc. Am. B 10, 2195–2200 (1993).
[CrossRef]

J. Chung and A. E. Siegman, “Singly resonant continuous-wave mode-locked KTiOPO4optical parametric oscillator pumped by Nd:YAG laser,” J. Opt. Soc. Am. B 10, 2201–2210 (1993).
[CrossRef]

Ch. Grässer, D. Wang, R. Beigang, and R. Wallenstain, “Singly resonant optical parametric oscillator of KTiOPO4synchronously pumped by the radiation of a continuous-wave mode-locked Nd:YLF laser,” J. Opt. Soc. Am. B 10, 2218–2221 (1993).
[CrossRef]

E. C. Cheung and J. M. Liu, “Theory of a synchronously pumped optical parametric oscillator in steady-state operation,” J. Opt. Soc. Am. B 7, 1385–1401 (1990).
[CrossRef]

E. C. Cheung and J. M. Liu, “Efficient generation of ultrashort, wavelength-tunable infrared pulses,” J. Opt. Soc. Am. B 8, 1491–1506 (1991).
[CrossRef]

J. D. Bierlein and H. Vanherzeele, “Potassium titanyl phosphate: properties and new applications,” J. Opt. Soc. Am. B 6, 622–633 (1989).
[CrossRef]

J. M. Liu, G. Zhou, and S. J. Pyo, “Parametric gain of the generation and the amplification of ultrashort optical pulses,” J. Opt. Soc. Am. B 12, 2274–2287 (1995).
[CrossRef]

Opt. Commun. (2)

T. J. Driscoll, G. M. Gale, and F. Hache, “Ti:sapphire second harmonic pumped visible range femtosecond optical parametric oscillator,” Opt. Commun. 110, 638–644 (1994).
[CrossRef]

J. M. Dudley, D. T. Reid, M. Ebrahimzadeh, and W. Sibbett, “Characteristics of a non-critically phase-matched Ti:sapphire pumped femtosecond optical parametric oscillator,” Opt. Commun. 104, 419–430 (1994).
[CrossRef]

Opt. Lett. (12)

P. E. Powers, C. L. Tang, and L. K. Cheng, “High-repetition-rate femtosecond optical parametric oscillator based on CsTiOAsO4,” Opt. Lett. 19, 37–39 (1994).
[CrossRef] [PubMed]

A. Robertson and A. J. Ferguson, “Synchronously pumped all-solid-state lithium triborate optical parametric oscillator in a ring configuration,” Opt. Lett. 19, 117–119 (1994).
[CrossRef] [PubMed]

M. Ebrahimzadeh, G. P. A. Malcolm, and A. I. Ferguson, “Continuous-wave mode-locked optical parametric oscillator synchronously pumped by a diode-laser-pumped solid-state laser,” Opt. Lett. 17, 183–185 (1992).
[CrossRef] [PubMed]

E. S. Wachman, D. C. Edelstein, and C. L. Tang, “Continuous-wave mode-locked and dispersion-compensated femtosecond optical parametric oscillator,” Opt. Lett. 15, 136–138 (1990).
[CrossRef] [PubMed]

M. J. McCarthy and D. C. Hanna, “Continuous-wave mode-locked singly resonant optical parametric oscillator synchronously pumped by a laser-diode-pumped Nd:YLF laser,” Opt. Lett. 17, 402–404 (1992).
[CrossRef] [PubMed]

Q. Fu, G. Mak, and H. M. van Driel, “High-power, 62-fs infrared optical parametric oscillator synchronously pumped by a 76-MHz Ti:sapphire laser,” Opt. Lett. 17, 1006–1008 (1992).
[CrossRef] [PubMed]

W. S. Pelouch, P. E. Powers, and C. L. Tang, “Ti:sapphire-pumped, high-repetition-rate femtosecond optical parametric oscillator,” Opt. Lett. 17, 1070–1072 (1992).
[CrossRef] [PubMed]

P. E. Powers, S. Ramakrishna, C. L. Tang, and L. K. Cheng, “Optical parametric oscillation with KTiOAsO4,” Opt. Lett. 18, 1171–1173 (1993).
[CrossRef] [PubMed]

S. D. Butterworth, M. J. McCarthy, and D. C. Hanna, “Widely tunable synchronously pumped optical parametric oscillator,” Opt. Lett. 18, 1429–1431 (1993).
[CrossRef] [PubMed]

E. C. Cheung, K. Koch, and G. T. Moore, “Silver thiogallate, singly resonant optical parametric oscillator pumped by a continuous-wave mode-locked Nd:YAG laser,” Opt. Lett. 19, 631–633 (1994).
[CrossRef] [PubMed]

J. M. Liu and J. K. Chee, “Passive mode locking of a cw Nd:YLF laser with a nonlinear external coupled cavity,” Opt. Lett. 15, 685–687 (1990).
[CrossRef] [PubMed]

E. C. Cheung, K. Koch, G. T. Moore, and J. M. Liu, “Measurements of second-order nonlinear optical coefficients from the spectral brightness of parametric fluorescence,” Opt. Lett. 19, 168–170 (1994).
[CrossRef] [PubMed]

Sov. J. Quantum Electron. (1)

A. Piskarskas, V. Smil’gyavichyus, and A. Umbrasas, “Continuous parametric generation of picosecond light pulses,” Sov. J. Quantum Electron. 18, 155–156 (1988).
[CrossRef]

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Figures (11)

Fig. 1
Fig. 1

Schematic of the OPO setup. SHG, second-harmonic generating.

Fig. 2
Fig. 2

Average signal and idler output powers versus the average pump power sent into the KTP crystal.

Fig. 3
Fig. 3

Total signal and idler efficiencies versus the average power sent into the KTP crystal.

Fig. 4
Fig. 4

Percentage of pump depletion and total conversion efficiency versus the average power sent into the KTP crystal.

Fig. 5
Fig. 5

Background-free autocorrelation of (a) the signal pulses at the 889-nm wavelength, (b) the idler pulses at the 1292-nm wavelength. The filled circles correspond to the experimental data; the curve is the theoretical fitting curve, assuming a Gaussian pulse shape.

Fig. 6
Fig. 6

Spectrum of (a) the signal pulses at the 889-nm wavelength, (b) the idler pulses at the 1292-nm wavelength.

Fig. 7
Fig. 7

Single-wavelength TEM00-mode signal output power as a function of cavity-length detuning.

Fig. 8
Fig. 8

Tuning curve for a KTP OPO that is phase matched in the xz plane for a 527-nm pump. The thick portions of the curves correspond to the experimental data points. The thinner portions are calculated tuning curves from Ref. 26.

Fig. 9
Fig. 9

Spectra of the signal pulses with different transverse modes. The solid curve represents the spectrum of the TEM00 mode; the dashed curve corresponds to the spectrum of the TEM11 mode.

Fig. 10
Fig. 10

Spectra of the signal and the idler pulses under different conditions of multiple-wavelength oscillation.

Fig. 11
Fig. 11

Signal output power as a function of cavity-length detuning under the conditions shown in Figs. 10(e) and 10(f).

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