Theoretical and experimental investigation of optical couplers in SOI

Zinke, T.; Fischer, U. H. P.; Schueppert, Berndt; Petermann, K.

doi:10.1117/12.273854

Cited by 10 publications

(3 citation statements)

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“…The ER of the MMI-based MZI is over 20 dB for TE and almost 30 dB for TM, which is clearly better in comparison with the adiabatic coupler. The results of the MMI-based device are comparable to those achieved earlier with SOI [8]. In order to improve the ER of the adiabatic coupler-based device, the device geometry should be optimized to further suppress the residual excitation of the higher order modes.…”

Section: Resultssupporting

confidence: 70%

Adiabatic and Multimode Interference Couplers on Silicon-on-Insulator

Solehmainen

Kapulainen

Harjanne

et al. 2006

IEEE Photon. Technol. Lett.

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Abstract-Adiabatic and multimode interference (MMI) 3-dB couplers based on silicon-on-insulator rib waveguides were fabricated and measured. For testing purposes, pairs of identical couplers were cascaded to form Mach-Zehnder interferometers.The adiabatic couplers showed excess on-chip loss of 0.5 dB, extinction ratio (ER) of 15-20 dB, and a wide spectral range. The MMI couplers processed on the same wafer showed similar loss per coupler, higher ER, and limited spectral characteristics.

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Section: Resultssupporting

confidence: 70%

Adiabatic and Multimode Interference Couplers on Silicon-on-Insulator

Solehmainen

Kapulainen

Harjanne

et al. 2006

IEEE Photon. Technol. Lett.

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“…MMI couplers and splitters on the silicon-on-insulator (SOI) platform have been studied and fabricated [1][2][3]. Ring resonators have been realized in silicon waveguides [4], including racetrack designs [5], and polarization insensitive structures [6].…”

Section: Introductionmentioning

confidence: 99%

Mirror cavity MMI-coupled photonic wire resonator in SOI

Bock

Cheben

et al. 2007

SPIE Proceedings

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We propose a new waveguide resonator device with a mirror cavity and a multimode interference (MMI) coupler. We present simulation results for the silicon wire MMI coupler with suppressed reflections and its use as a coupling element in the resonator cavity, built on the silicon-on-insulator waveguide platform. Tapering structures used in the reflection suppression were optimized, and the wavelength dependency of a conventional MMI was compared to that of the MMI with reflection suppression. Two-mirror MMI coupled resonator was studied using finite difference time domain simulation by both pulse and continuous wave excitation. The optimal resonator has a very small footprint of 3 µm × 29.7 µm, with a quality factor of 774.

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“…These came with a variety of device geometry, functionalities, and performance characteristics. The simplest of these was proposed, designed, and demonstrated earlier by Zinke et al in 1997 [10] and recently by Ota et al [11] and Oulton et al [12].…”

mentioning

confidence: 99%

2x4 Hybrid MZI-MMI Configuration with MMI Phase-shifters as a High-speed Optical Switch with Low Power Consumption

Niraula¹,

Rizal²

2019

Preprint

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This paper reports 2 × 4 hybrid Mach-zehnder interferometer (MZI) - multi-mode interferometers (MMI) based compact thermo-optical switch consisting of slab waveguides on silicon-on-insulator, SOI, platform. The device consists of two identical MMIs, each of 6 μm wide and 140 μm long connected with two phase shifters MMIs each with 2 μm wide and 8 μm long and linear tappers each 4 μm long, connected at both ends of the MMIs to minimize the power coupling loss. The loss for linear taper is found to be below 0.02dB. The footprint of the whole device is six 6 μm × 324 μm. This structure is based on unique multimode region shape, which leads optical switch to have less coupling loss and reduced cross-talk. The average thermo-optical switching power consumption is 1.4 mW, the excess losses are 0.8 dB, and the imbalances are 0.1 dB. Aluminum is used as a heating pad, and a trench is created around this pad to prevent from spreading of heat and reduce power loss almost by a factor of 2 to the adjacent phase shifter. Our new heating method has advantages of compact size and ease of fabrication with the current CMOS technology.

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Theoretical and experimental investigation of optical couplers in SOI

Cited by 10 publications

References 0 publications

Adiabatic and Multimode Interference Couplers on Silicon-on-Insulator

Adiabatic and Multimode Interference Couplers on Silicon-on-Insulator

Mirror cavity MMI-coupled photonic wire resonator in SOI

2x4 Hybrid MZI-MMI Configuration with MMI Phase-shifters as a High-speed Optical Switch with Low Power Consumption

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