Speed limit of all-optical gate switches using cascaded second-order nonlinear effect in quasi-phase-matched LiNbO3 devices
Tóm tắt
In all-optical gate switches that employ the cascaded second-order nonlinear effect in quasi-phase-matched (QPM) LiNbO/sub 3/ devices, walkoff between the fundamental and second harmonic pulses is very large. The authors experimentally show that crosstalk of the switch induced by such walkoff limits the switching speed, but that the switching speed can significantly be enhanced by walkoff compensation. Using a 20-mm-long QPM LiNbO/sub 3/ waveguide device, the authors switch one of twin pulses separated by 6.25 ps without crosstalk, showing the possibility of switching a 160-Gb/s signal.
Từ khóa
#Optical harmonic generation #Optical wavelength conversion #Fiber nonlinear optics #Nonlinear optics #Optical crosstalk #Optical mixing #Optical pumping #Clocks #Optical switches #Ultrafast opticsTài liệu tham khảo
10.1049/el:20001125
10.1049/el:20010565
fukuchi, 2001, ultrafast operation of four-wave mixing switches using the quasiphase matched cascaded second-order nonlinear effect, Proc Tech Dig Euro Conf Optical Communication (ECOC 2001), 396
10.1109/CLEO.2001.947856
10.1049/el:19981522
10.1109/68.896327
10.1109/68.766774