An integrated Michelson delay interferometer structure making use of waveguide gratings as reflective elements is proposed and fabricated by direct ultraviolet writing. Successful return-to-zero alternate-mark-inversion signal generation using phase-to-intensity modulation conversion is demonstrated up to 40 Gb/s using the device. Compared to other implementations, the device is compact, inherently stable, and allows for easy customization of the pulsewidth by proper positioning of the gratings on a single coupler structure.
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Peucheret, C., Geng, Y., Zsigri, B., Sørensen, H. R., Chi, N., Deyerl, H-J., Kristensen, M., & Jeppesen, P. (2005). Direct UV written Michelson interferometer for RZ signal generation using phase-to-intensity modulation conversion. I E E E Photonics Technology Letters, 17(8), 1674 - 1676. https://doi.org/10.1109/LPT.2005.851930