Mode division multiplexing
Integrated InP circuit for short-reach few-mode-fiber transmission performing simultaneous mode and wavelength demultiplexing
Application: space-division multiplexing, MDM-WDM transmission systems…
- two mode demultiplexing for few-mode-fibres
- all-optical MIMO processing capabilities to unscramble mode mixing generated by fiber propagation
- single arrayed waveguide grating (AWG) for wavelength demultiplexing for both mode channels (4 wavelengths per channel)
- integrated photodiodes
Melati, Daniele, Andrea Alippi, and Andrea Melloni. 2016. “Reconfigurable Photonic Integrated Mode (de)Multiplexer for SDM Fiber Transmission.” Opt. Express 24 (12): 12625–12634. https://doi.org/10.1364/OE.24.012625.
Melati, Daniele, Andrea Alippi, Andrea Annoni, Nicola Peserico, and Andrea Melloni. 2017. “Integrated All-Optical MIMO Demultiplexer for Mode- and Wavelength-Division-Multiplexed Transmission.” Opt. Lett. 42 (2): 342–345. https://doi.org/10.1364/OL.42.000342.
Optical delay line
Non-resonant integrated optical delay line with continuous delay tunability based on cascaded Mach-Zehnder interferometers
Application: radio-over-fiber, microwave photonics, beam stearing, true-time delay…
- single- and multi-stage device based on Mach-Zehnder interferometers
- continuous control of the delay and simple control mechanism
- improved bandwidth-delay product and reduced dispersion compared to resonant circuits
- experimentally demonstrated up to 125 ps and 10Gbit/s transmission.
Waqas, A., D. Melati, and A. Melloni. 2018. “Cascaded Mach-Zehnder Architectures for Photonic Integrated Delay Lines.” IEEE Photonics Technology Letters, 1–1. https://doi.org/10.1109/LPT.2018.2865703.
Melati, Daniele, Abi Waqas, Zarlish Mushtaq, and Andrea Melloni. 2018. “Wideband Integrated Optical Delay Line Based on a Continuously Tunable Mach-Zehnder Interferometer.” IEEE Journal of Selected Topics in Quantum Electronics 24 (1): 1–8. https://doi.org/10.1109/JSTQE.2017.2723955.
Athermal echelle grating filter
Echelle wavelength (de)multiplexer with reduced temperature sensitivity
Application: WDM systems, passive filters, low-power systems..
- temperature-synchronized Mach-Zehnder interferometer as input of the echelle filter
- spectral shift over a temperature range of 20 K reduced from 1.6 nm to less than ±45 pm for all the channels
- the design relies exclusively on a standard fabrication process for silicon-on-insulator photonic devices without materials with negative thermo-optic coefficient
Melati, Daniele, Pierre G. Verly, André Delâge, Pavel Cheben, Jens H. Schmid, Siegfried Janz, and Dan-Xia Xu. 2018. “Athermal Echelle Grating Filter in Silicon-on-Insulator Using a Temperature-Synchronized Input.” Optics Express 26 (22): 28651–60. https://doi.org/10.1364/OE.26.028651.