Broadly, independent-tunable, dual-wavelength mid-infrared ultrafast optical parametric oscillator.

We demonstrate a two-crystal mid-infrared dual-wavelength optical parametric oscillator, synchronously pumped by a high power femtosecond Yb:fiber laser. The singly-resonant ring cavity, containing two periodically poled lithium niobate crystals, is capable of generating two synchronized idler wavelengths, independently tunable over 30 THz in the 2.9 - 4.2 μm wavelength region, due to the cascaded quadratic nonlinear effect. The independent tunability of the two idlers makes the optical parametric oscillator a promising source for ultrafast pulse generation towards the THz wavelength region, based on different frequency generation. In addition, the observed frequency doubled idler within the crystal indicates the possibility to realize a broadband optical self-phase locking between pump, signal, idler and higher order generated parametric lights.

[1]  Michel Digonnet,et al.  Self-phase-locked degenerate femtosecond optical parametric oscillator. , 2008, Optics letters.

[2]  André Clairon,et al.  A phase-locked frequency divide-by-3 optical parametric oscillator , 2001, IEEE Trans. Instrum. Meas..

[3]  M. Le Berre,et al.  Theory of self-phase-locked optical parametric oscillators , 2001 .

[4]  P. Becker,et al.  Two-color synchronously mode-locked femtosecond Ti:sapphire laser. , 1993, Optics letters.

[5]  Julien Mandon,et al.  Two-crystal mid-infrared optical parametric oscillator for absorption and dispersion dual-comb spectroscopy. , 2014, Optics letters.

[6]  T. Yagi,et al.  Dual-wavelength synchronous operation of a mode-locked Ti:sapphire laser based on self-spectrum splitting. , 1993, Optics letters.

[7]  Yuri S. Kivshar,et al.  Optical gap solitons in nonresonant quadratic media. , 1999 .

[8]  R. Boyd,et al.  Self-focusing: Past and Present , 2009 .

[9]  Hachiro Nakanishi,et al.  Collinear phase-matched terahertz-wave generation in GaP crystal using a dual-wavelength optical parametric oscillator , 2004 .

[10]  Curtis R. Menyuk,et al.  Solitary waves due to ?^(2): ?^(2) cascading , 1994 .

[11]  Yonghang Shen,et al.  A fiber laser pumped dual-wavelength mid-infrared optical parametric oscillator based on aperiodically poled magnesium oxide doped lithium niobate , 2013 .

[12]  G. Stegeman,et al.  Self-focusing and self-defocusing by cascaded second-order effects in KTP. , 1992, Optics letters.

[13]  Y. Kivshar,et al.  Nonlinear phase shift resulting from two-color multistep cascading , 2000 .

[14]  Dmitry V. Skryabin,et al.  Optical solitons due to quadratic nonlinearities: from basic physics to futuristic applications , 2002 .

[15]  D. Jundt,et al.  Temperature-dependent Sellmeier equation for the index of refraction, n(e), in congruent lithium niobate. , 1997, Optics letters.

[16]  M. Ebrahim-Zadeh,et al.  Fiber-laser-pumped, dual-wavelength, picosecond optical parametric oscillator. , 2014, Optics letters.

[17]  Frans J. M. Harren,et al.  Femtosecond optical parametric oscillators toward real-time dual-comb spectroscopy , 2015, Applied Physics B.

[18]  Konstantin L. Vodopyanov,et al.  Optical THz‐wave generation with periodically‐inverted GaAs , 2008 .

[19]  M M Fejer,et al.  Intracavity terahertz-wave generation in a synchronously pumped optical parametric oscillator using quasi-phase-matched GaAs. , 2007, Optics letters.

[20]  Feruz Ganikhanov,et al.  Broadly tunable dual-wavelength light source for coherent anti-Stokes Raman scattering microscopy. , 2006, Optics letters.

[21]  Jun Ye,et al.  Sub-10-femtosecond active synchronization of two passively mode-locked Ti:sapphire oscillators , 2001 .

[22]  K. Boller,et al.  Phase-coherent all-optical frequency division by three , 2003 .

[23]  S. Jackson,et al.  Dual wavelength Q-switched cascade laser. , 2012, Optics letters.

[24]  Tom Gardiner,et al.  Asynchronous midinfrared ultrafast optical parametric oscillator for dual-comb spectroscopy. , 2012, Optics letters.

[25]  Ching-yue Wang,et al.  High-power, dual-wavelength femtosecond LiB₃O₅ optical parametric oscillator pumped by fiber laser. , 2014, Optics letters.

[26]  S. Saltiel,et al.  Polarization switching as a result of cascading of two simultaneously phase-matched quadratic processes. , 1999, Optics letters.

[27]  Mihalache,et al.  Walking Solitons in Quadratic Nonlinear Media. , 1996, Physical review letters.

[28]  K. Kawase,et al.  Tunable terahertz-wave generation from DAST crystal by dual signal-wave parametric oscillation of periodically poled lithium niobate. , 2000, Optics letters.

[29]  S. Saltiel,et al.  Nonlinear phase shift via multistep χ(2) cascading , 1998 .

[30]  K. Vodopyanov,et al.  Photonic THz generation in GaAs via resonantly enhanced intracavity multispectral mixing , 2011 .

[31]  G. K. Samanta,et al.  Dual-wavelength, two-crystal, continuous-wave optical parametric oscillator. , 2011, Optics letters.

[32]  Simple and versatile dual-signal wave optical parametric oscillator. , 2007, Optics letters.

[33]  Xianfeng Chen,et al.  All-optical tunable group-velocity control of femtosecond pulse by quadratic nonlinear cascading interactions. , 2008, Optics express.

[34]  Wenxiang Cao,et al.  Two-color pump-probe laser spectroscopy instrument with picosecond time-resolved electronic delay and extended scan range , 2005 .

[35]  Xiurong Ma,et al.  Spectral Characteristics of Femtosecond Pulses Propagation in Periodically Poled Lithium Niobate via Cascaded Quadratic Nonlinearity , 2015, IEEE Journal of Quantum Electronics.

[36]  K. Boller,et al.  Self-injection-locking of a CW-OPO by intracavity frequency-doubling the idler wave. , 1999, Optics express.

[37]  Jun Ye,et al.  Phase-stabilized, 1.5 W frequency comb at 2.8-4.8 microm. , 2009, Optics letters.

[38]  H. Giessen,et al.  Milliwatt-level mid-infrared (10.5-16.5 μm) difference frequency generation with a femtosecond dual-signal-wavelength optical parametric oscillator. , 2012, Optics letters.

[39]  Martin M. Fejer,et al.  High-repetition-rate femtosecond optical parametric oscillator based on periodically poled lithium niobate , 1997 .

[40]  G. Xie,et al.  Dual-wavelength synchronous operation of a mode-locked 2-μm Tm:CaYAlO4 laser. , 2015, Optics letters.

[41]  Efficient femtosecond optical parametric oscillator with dual-wavelength operation. , 2012, Optics letters.

[42]  Jun Ye,et al.  Quantum-noise-limited optical frequency comb spectroscopy. , 2011, Physical review letters.

[43]  Jinghua Sun,et al.  Dual-color operation of a femtosecond optical parametric oscillator exhibiting stable relative carrier-envelope phase-slip frequencies. , 2006, Optics letters.

[44]  R. Ramponi,et al.  Group velocity control by quadratic nonlinear interactions , 2005, 2005 IEEE LEOS Annual Meeting Conference Proceedings.