QUASI-POLARIZATION-INDEPENDENT MACH-ZEHNDER COHERENCE MODULATOR DEMODULATOR INTEGRATED IN Z-PROPAGATING LITHIUM-NIOBATE

We present in this paper recent results obtained in the area of cohere nce multiplexing and integrated optics. It is well known that coherenc e multiplexing requires two-wave interferometric modulators featuring large optical delays. We report a system formed by a pair of Mach-Zehn der interferometers integrated in a Z-propagating lithium niobate crys tal, suitable for quasi-polarization-independent transmissions of sign als by coherence modulation. The behavior and the working conditions a re presented for the TE and TM polarization states of the light.