Nonlinear dynamics inside femtosecond enhancement cavities.

We have investigated the effect of intracavity nonlinear dynamics arising from enhanced peak powers of femtosecond pulses inside broad-bandwidth, dispersion-controlled, high-finesse optical cavities. We find that for chi(3) nonlinearities, when a train of femtosecond pulses are maximally coupled into a cavity by active stabilization of its frequency comb to the corresponding linear resonances of a cavity, enhancement ceases when the peak nonlinear phase shift is sufficient to shift the cavity resonance frequencies by more than a cavity linewidth. In addition, we study and account for the complex spectral dynamics that result from chirping the input pulse and show excellent qualitative agreement with experimental results.

[1]  Jun Ye,et al.  Femtosecond pulse amplification by coherent addition in a passive optical cavity. , 2002, Optics letters.

[2]  Z. Ou,et al.  Enhanced conversion efficiency for harmonic generation with double resonance. , 1993, Optics letters.

[3]  A. Luiten,et al.  Short pulses in optical resonators. , 2003, Optics express.

[4]  G. D. Boyd,et al.  Resonant optical second harmonic generation and mixing , 1966 .

[5]  A. Kastler,et al.  Atomes à I’Intérieur d’un Interféromètre Perot-Fabry , 1962 .

[6]  W. J. Kozlovsky,et al.  Second-harmonic generation of a continuous-wave diode-pumped Nd:YAG laser using an externally resonant cavity. , 1987, Optics letters.

[7]  F. Ouellette,et al.  Ultrashort pulse reshaping with a nonlinear Fabry–Perot cavity matched to a train of short pulses , 1988 .

[8]  Jun Ye,et al.  Ultrasensitive detections in atomic and molecular physics: demonstration in molecular overtone spectroscopy , 1998 .

[9]  Jun Ye,et al.  Precise measurements of optical cavity dispersion and mirror coating properties via femtosecond combs. , 2005, Optics express.

[10]  Jun Ye,et al.  Thermally induced self-locking of an optical cavity by overtone absorption in acetylene gas , 1996 .

[11]  T. Hänsch,et al.  Phase-coherent light pulses for atom optics and interferometry. , 1997, Optics letters.

[12]  V. Petrov,et al.  Improved mode locking of a femtosecond titanium‐doped sapphire laser by intracavity second harmonic generation , 1992 .

[13]  Jun Ye,et al.  APPLICATIONS OF OPTICAL CAVITIES IN MODERN ATOMIC, MOLECULAR, AND OPTICAL PHYSICS , 2003 .

[14]  R. Paschotta,et al.  Highly efficient frequency doubling with a doubly resonant monolithic total-internal-reflection ring resonator. , 1993, Optics letters.

[15]  A. Ferguson,et al.  Frequency doubling of a single frequency Ti : Al2O3 laser using an external enhancement cavity , 1990 .

[16]  J. Diels,et al.  Stabilization of femtosecond lasers for optical frequency metrology and direct optical to radio frequency synthesis. , 2001, Physical review letters.

[17]  Jun Ye,et al.  High-repetition-rate coherent femtosecond pulse amplification with an external passive optical cavity. , 2004, Optics letters.

[18]  Jun Ye,et al.  Precision stabilization of femtosecond lasers to high-finesse optical cavities , 2004 .