All-optical variable-in variable-out wavelength converter based on cascaded nonlinearity in aperiodic optical superlattice

We theoretically report a new method to achieve variable-in, variable-out wavelength conversion in LiNbO3 with aperiodic optical superlattices (AOS) structure. The optimal structure of the LiNbO3 sample was obtained through simulated annealing (SA) method. About 3.4nm prescribe pump bandwidth at 1559nm is achieved to fulfill variable wavelength conversion among four selected ITU signal channels (C23-C20). As the result of large pump bandwidth, the reduced effective nonlinear coefficient of the AOS sample decreases to 0.21. Fluctuation of the operation temperature, variation of the incident angle and the errors in poling process show little influence on the performance of the device.

[1]  Optical variable-in variable-out wavelength converters based on MgO doped LiNbO/sub 3/ quasi-phase matched waveguides , 2002, Optical Fiber Communication Conference and Exhibit.

[2]  M M Fejer,et al.  1.5-microm-band wavelength conversion based on difference-frequency generation in LiNbO3 waveguides with integrated coupling structures. , 1998, Optics letters.

[3]  C. D. Gelatt,et al.  Optimization by Simulated Annealing , 1983, Science.

[4]  Masaki Asobe,et al.  Multiple quasi-phase-matched LiNbO3 wavelength converter with a continuously phase-modulated domain structure. , 2003, Optics letters.

[5]  I. Brener,et al.  1.5-μm-band wavelength conversion based on cascaded second-order nonlinearity in LiNbO3 waveguides , 1999, IEEE Photonics Technology Letters.

[6]  Yan Zhang,et al.  Enhanced harmonic generation in aperiodic optical superlattices , 1999 .

[7]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[8]  M. Fejer,et al.  Multiple-channel wavelength conversion by use of engineered quasi-phase-matching structures in LiNbO(3) waveguides. , 1999, Optics letters.

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

[10]  M. Fejer,et al.  Quasi-phase-matched second harmonic generation: tuning and tolerances , 1992 .

[11]  George I. Stegeman,et al.  Efficient wavelength shifting over the erbium amplifier bandwidth via cascaded second order processes in lithium niobate waveguides , 1997 .

[12]  Investigations of harmonic generations in aperiodic optical superlattices , 2000 .

[13]  Zeng Xianglong,et al.  Second-harmonic generation with broadened flattop bandwidth in aperiodic domain-inverted gratings , 2002 .

[14]  Observation of all-optical wavelength conversion based on cascaded effect in periodically poled lithium niobate waveguide , 2003 .

[15]  S. Yoo.  Wavelength conversion technologies for WDM network applications , 1996 .