A high-speed 4*4 Ti:LiNbO3 integrated optic switch at 1.5 μm

The operation of a fully packaged and pigtailed polarization dependent Ti:LiNbO
₃
4*4 integrated optic switch with an operating wavelength of 1.5 μm is demonstrated. The switching matrix is fast, with a measured 3-dB small-signal bandwidth greater than 1 GHz. Unwanted cross modulation between channels due to coupling between switching elements was measured and found to be less than -20 dB of the signal strength. The switch is composed of balanced bridge switching elements having a 17-V switching voltage, an 18 dB extinction ratio, and an excess optical loss of 0.6 dB.