Bandwidth and tunability enhancement of wavelength conversion by quasi-phase-matching difference frequency generation

Abstract Bandwidth and tunability enhancement of difference frequency generation (DFG)-based wavelength conversion by introducing various distributing formats of π-phase shifting domains into the quasi-phase-matching (QPM) gratings is demonstrated, and the concise expressions describing the tuning curves in these cases are obtained for the first time. The results show not only the pump and signal bandwidth can be obviously broadened and flattened, but also diverse comblike pump–wavelength tuning curves with controllable channel spacing can be achieved by introducing periodically distributed π-phase shifting domains into the QPM gratings, which would greatly improve the tunability and practibility of DFG-based wavelength converters.

[1]  Toshiaki Suhara,et al.  Theoretical analysis of waveguide second-harmonic generation phase matched with uniform and chirped gratings , 1990 .

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

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

[4]  Waveguide second-harmonic generation device with broadened flat quasi-phase-matching response by use of a grating structure with located phase shifts. , 1998, Optics letters.

[5]  S. J. B. Yoo,et al.  Wavelength conversion by difference frequency generation in AlGaAs waveguides with periodic domain inversion achieved by wafer bonding , 1996 .

[6]  Stability and bandwidth enhancement of difference frequency generation (DFG)-based wavelength conversion by pump detuning , 1999 .

[7]  Yili Guo,et al.  Theoretical analyses and optimizations for wavelength conversion by quasi-phase-matching difference frequency generation , 2001 .

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

[9]  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.

[10]  Martin M. Fejer,et al.  1.5-μm-band wavelength conversion based on cascaded second-order nonlinearity in LiNbO 3 waveguides , 1999 .