Abstract

We report on the observation of self-injection-locking of the signal wave of an optical parametric oscillator (OPO) with the intracavity frequency doubled idler wave. The two-mirror OPO is based on a periodically poled LiNbO3 (PPLN) crystal and pumped with a grating stabilized, continuous-wave (CW) single-frequency diode master-oscillator power-amplifier (MOPA) system. Simultaneous quasi-phase-matching (QPM) of OPO and second harmonic generation (SHG) is provided in the same crystal which carries two different domain gratings. The beat of the signal wave and the frequency-doubled idler wave is suppressed within a 500-kHz wide frequency range centered around zero as expected for self-injection- locking. The measurements prove the feasibility of optically phase-stabilized by-three-division of an optical frequency with CW-OPOs using cascaded nonlinearities.

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References

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  1. N. C. Wong, "Optical frequency counting from the UV to the near IR," Opt. Lett. 17, 1155 (1992).
    [CrossRef] [PubMed]
  2. D. Lee, N. C. Wong, "Tunable optical frequency division using a phase-locked OPO," Opt. Lett. 17, 13 (1992).
    [CrossRef] [PubMed]
  3. T. Ikegami, S. Slyusarev, Shin-ichi Ohshima, "Realization of a 3:1 optical frequency divider using a CW optical parametric oscillator," in Conference on Lasers and Electro-Optics, OSA Technical Digest (Optical Society of America, Washington DC, 1999), pp. 10-11.
  4. H. R. Telle, D. Meschede, T. W. H�nsch, "Realization of a new concept for visible frequency division: phase locking of harmonic and sum frequencies," Opt. Lett. 15, 532 (1990)
    [CrossRef] [PubMed]
  5. I. Andonovic, D. Uttamchandani, Principles of modern optical systems (Artech House, Norwood, 1989), Chap. 5.
  6. C. D. Nabors, S. T. Yang, T. Day, R. L. Byer, "Coherence properties of a doubly-resonant monolithic optical parametric oscillator," J. Opt. Soc. Am. B 7, 815 (1990).
    [CrossRef]
  7. A. E. Siegman, Lasers (University Science Books, Mill Valley, 1986), Chap. 29.
  8. E. J. Mason, N. C. Wong, "Observation of two distinct phase states in a self-phase-locked type II phase-matched OPO," Opt. Lett. 23, 1733 (1998).
    [CrossRef]
  9. M. Scheidt, B. Beier, K.-J. Boller, R. Wallenstein, "Frequency-stable operation of a diode-pumped continuous-wave RbTiOAsO4 optical parametric oscillator," Opt. Lett. 22, 1287 (1997).
    [CrossRef]
  10. R. W. P. Drever, J. L. Hall, F. V. Kowalski, J. Hough, G. M Ford, A. J. Munley, H. Ward, "Laser phase and frequency stabilization using an optical resonator," Appl. Phys. B 31, 97 (1983).
    [CrossRef]

Other

N. C. Wong, "Optical frequency counting from the UV to the near IR," Opt. Lett. 17, 1155 (1992).
[CrossRef] [PubMed]

D. Lee, N. C. Wong, "Tunable optical frequency division using a phase-locked OPO," Opt. Lett. 17, 13 (1992).
[CrossRef] [PubMed]

T. Ikegami, S. Slyusarev, Shin-ichi Ohshima, "Realization of a 3:1 optical frequency divider using a CW optical parametric oscillator," in Conference on Lasers and Electro-Optics, OSA Technical Digest (Optical Society of America, Washington DC, 1999), pp. 10-11.

H. R. Telle, D. Meschede, T. W. H�nsch, "Realization of a new concept for visible frequency division: phase locking of harmonic and sum frequencies," Opt. Lett. 15, 532 (1990)
[CrossRef] [PubMed]

I. Andonovic, D. Uttamchandani, Principles of modern optical systems (Artech House, Norwood, 1989), Chap. 5.

C. D. Nabors, S. T. Yang, T. Day, R. L. Byer, "Coherence properties of a doubly-resonant monolithic optical parametric oscillator," J. Opt. Soc. Am. B 7, 815 (1990).
[CrossRef]

A. E. Siegman, Lasers (University Science Books, Mill Valley, 1986), Chap. 29.

E. J. Mason, N. C. Wong, "Observation of two distinct phase states in a self-phase-locked type II phase-matched OPO," Opt. Lett. 23, 1733 (1998).
[CrossRef]

M. Scheidt, B. Beier, K.-J. Boller, R. Wallenstein, "Frequency-stable operation of a diode-pumped continuous-wave RbTiOAsO4 optical parametric oscillator," Opt. Lett. 22, 1287 (1997).
[CrossRef]

R. W. P. Drever, J. L. Hall, F. V. Kowalski, J. Hough, G. M Ford, A. J. Munley, H. Ward, "Laser phase and frequency stabilization using an optical resonator," Appl. Phys. B 31, 97 (1983).
[CrossRef]

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Figures (5)

Fig. 1.
Fig. 1.

Experimental setup for self-injection locking of a CW-OPO with its idler frequency set to a third of the pump frequency (FR: Faraday rotator, EOM: electro-optical modulator, PD: photodiode, PZT: piezo transducer, FPI: confocal scanning Fabry-Perot interferometer).

Fig. 2.
Fig. 2.

Signal wave output power of the OPO with a crystal temperature of 167 °C as a function of pump power. The pump, signal, and idler wavelength are 812 nm, 1218 nm, and 2436 nm, respectively.

Fig. 3.
Fig. 3.

Output of the OPO (on a logarithmic scale) vs. wavelength for different crystal temperatures. The emission peaks show the signal wavelength and one-half of the idler wavelength.

Fig. 4.
Fig. 4.

RF beat frequency of the signal and the frequency-doubled idler wave as recorded with an RF spectrum analyzer. For details, see text.

Fig. 5.
Fig. 5.

Signal-idler beat recorded around the upper sideband in the max-hold mode (integration time of over 2 minutes, black trace). For reference, the red trace is recorded with the photodiode blocked.

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