Angled MMI optical switch

Dana S. Akil; Muhammad A. Othman; Mohamed A. Swillam

doi:10.1117/12.2669807

31 May 2023 Angled MMI optical switch

Dana S. Akil, Muhammad A. Othman, Mohamed A. Swillam

Proceedings Volume 12575, Integrated Optics: Design, Devices, Systems and Applications VII; 125750E (2023) https://doi.org/10.1117/12.2669807
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

The work presented here demonstrated and analyzed an angled multimode interference (AMMI) waveguide optical switch with a feedback network to reduce the length of the device. The optical power in the MMI different ports was controlled by changing the phase using an optical shifter. The MMI waveguide was symmetrically excited in forward direction, giving a single symmetrical image at the output port. This signal is then split into two equal halves using a Y-junction. Each half is guided in a single mode ring-like waveguide to be coupled to the MMI as feedback sources. According to the phase shift between the two rings, the signal can be switched to one of the output ports. A 25 μm tapered waveguide was used to change the spot size and reduce the optical losses, the tapers width for the inputs and outputs was optimized to be Wt =2.1 μm to fit our 6 μm MMI width. Angled ports were used for backward excitation. The angle between the ports and the MMI at the input was optimized at an angle of 8⁰. The MMI optimized length is 127.1 μm and extinction ratio of the proposed design was 18.2 dB and 16.5 dB for the two outputs ports at an operation wavelength of 1.55 μm.

Conference Presentation

Citation Download Citation

Dana S. Akil, Muhammad A. Othman, and Mohamed A. Swillam "Angled MMI optical switch", Proc. SPIE 12575, Integrated Optics: Design, Devices, Systems and Applications VII, 125750E (31 May 2023); https://doi.org/10.1117/12.2669807

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