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Article

O-Band Multimode Interference Coupler Power Combiner Using Slot-Waveguide Structures

Faculty of Engineering, Holon Institute of Technology (HIT), Holon 5810201, Israel
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Academic Editor: Dimitrios Zografopoulos
Appl. Sci. 2022, 12(13), 6444; https://doi.org/10.3390/app12136444
Received: 2 June 2022 / Revised: 23 June 2022 / Accepted: 23 June 2022 / Published: 24 June 2022
(This article belongs to the Special Issue Recent Advances in Silicon Photonics Design)
Photonic transmitters that operate with a high data transfer rate (over 150 Gb/s) at the O-band range (1260–1360 nm) require at least 100 milliwatts of power to overcome the power losses that are caused by using high-speed modulators. A laser with higher power can probably handle this requirement; however, for the transmitter system, this solution can be problematic due to the nonlinear effects that can happen, which may lead to high noise in the transmitter system. Thus, to solve this issue, we propose a new design of a 2 × 1 multimode interference (MMI) power combiner using silicon nitride (SiN) slot waveguide structures. The MMI power combiner and the SiN slot waveguide structures were optimized using the full-vectorial beam propagation method (FV-BPM) and the finite difference time domain (FDTD) method. After combining two sources, high efficiency was obtained of 94.8–97.6% from the total power after a short coupling length of 109.81 µm over the O-band range with a low back reflection of 44.94 dB. Thus, the proposed device can be very useful for combining two O-band sources to gain a higher power level, which can be utilized to improve performances in transmitter systems. View Full-Text
Keywords: index terms; FV-BPM; MMI; coupler; slot-waveguide; O-band; combiner index terms; FV-BPM; MMI; coupler; slot-waveguide; O-band; combiner
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MDPI and ACS Style

Khateeb, S.; Katash, N.; Malka, D. O-Band Multimode Interference Coupler Power Combiner Using Slot-Waveguide Structures. Appl. Sci. 2022, 12, 6444. https://doi.org/10.3390/app12136444

AMA Style

Khateeb S, Katash N, Malka D. O-Band Multimode Interference Coupler Power Combiner Using Slot-Waveguide Structures. Applied Sciences. 2022; 12(13):6444. https://doi.org/10.3390/app12136444

Chicago/Turabian Style

Khateeb, Salman, Netanel Katash, and Dror Malka. 2022. "O-Band Multimode Interference Coupler Power Combiner Using Slot-Waveguide Structures" Applied Sciences 12, no. 13: 6444. https://doi.org/10.3390/app12136444

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