Abstract

We demonstrate a novel technique for the generation of mode-locked pulses from a continuous-wave (cw) optical parametric oscillator (OPO). The technique is based on the deployment of a phase modulator in combination with an antiresonant ring interferometer internal to a cw OPO, simultaneously providing spectral broadening and phase-to-amplitude feedback modulation. The scheme is implemented in a doubly-resonant cw OPO based on MgO:sPPLT, configured in a standing-wave cavity and pumped at 532 nm. With the phase modulator activated and the cavity length synchronized, a stable train of 800 ps pulses is generated at a repetition rate of 160 MHz. Using single-pass second harmonic generation (SHG) of the OPO output, we observe a four times enhancement in SHG compared with cw operation, confirming the real achievement of energy concentration as a result of mode-locked operation.

© 2012 Optical Society of America

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References

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2011 (1)

2010 (1)

2007 (2)

2006 (1)

2004 (1)

M. Kato, K. Fujiura, and T. Kurihara, Electron. Lett. 40, 299 (2004).
[CrossRef]

1999 (1)

1973 (1)

A. E. Siegman, IEEE J. Quantum Electron. 9, 247 (1973).
[CrossRef]

Bahbah, S.

Bretenaker, F.

Diddams, S. A.

Drag, C.

Ebrahim-Zadeh, M.

Esteban-Martin, A.

Fayaz, G. R.

Forget, N.

Fujiura, K.

M. Kato, K. Fujiura, and T. Kurihara, Electron. Lett. 40, 299 (2004).
[CrossRef]

Hall, J. L.

Kato, M.

M. Kato, K. Fujiura, and T. Kurihara, Electron. Lett. 40, 299 (2004).
[CrossRef]

Kokabee, O.

Kumar, S. Chaitanya

Kurihara, T.

M. Kato, K. Fujiura, and T. Kurihara, Electron. Lett. 40, 299 (2004).
[CrossRef]

Lefebvre, M.

Ma, L.-S.

Melkonian, J.-M.

Rosencher, E.

Samanta, G. K.

Siegman, A. E.

A. E. Siegman, IEEE J. Quantum Electron. 9, 247 (1973).
[CrossRef]

Ye, J.

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Figures (4)

Fig. 1.
Fig. 1.

Experimental setup of the mode-locked cw OPO with intracavity PM and ARR.

Fig. 2.
Fig. 2.

Temporal output of the phase-modulated ARR when deployed external to the OPO. Inset: zoom for μ = 0.5 .

Fig. 3.
Fig. 3.

Temporal measurements of the output of the mode-locked OPO. Inset: zoom for μ = 0.5 .

Fig. 4.
Fig. 4.

(a) Typical spectrum of the CW and mode-locked (ML) signal extracted from the OPO when the PM is OFF and ON ( μ = 0.5 ), respectively. Inset: at degeneracy. (b) Enhancement of the SHG output for PM ON with respect to PM OFF operation, detected using a photo-detector.

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