Low wavelength dependency design for MMI (multi-mode interference) mode converter

Chaen, Yutaka; Tanabe, K.; Jiang, Haisong; Hamamoto, Kiichi

doi:10.1587/elex.12.20150727

Cited by 9 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The simulated insertion losses of Y 1 and Y 3 ports are equal to −3.69 dB, and the simulated excess loss of the device is −0.63 dB. Compared with the reported results of excess losses (varying from −0.1 to −1 dB)[9,10,[26][27][28][29],…”

mentioning

confidence: 63%

Optical mode switch based on multimode interference couplers

Xiao

Deng

Zhao

et al. 2016

J. Opt.

View full text Add to dashboard Cite

In this paper, we propose an optical mode switch based on two cascaded multimode interference (MMI) couplers. After a fundamental mode divided into two equal-power fundamental modes in the first MMI coupler, the thermo-optic effect is employed to modulate the phase of the two fundamental modes before directed to the next MMI for the purpose of mode switching. By adjusting the electric signals applied to the modulation arms, the proposed device can implement mode switching in three states: (a) one first-order and two fundamental modes simultaneously output, (b) one first-order mode output, and (c) two fundamental modes output. As a result, the simulated excess losses are −0.29 dB, −0.10 dB, and −0.63 dB, respectively.

show abstract

mentioning

confidence: 63%

Optical mode switch based on multimode interference couplers

Xiao

Deng

Zhao

et al. 2016

J. Opt.

View full text Add to dashboard Cite

show abstract

“…The disadvantage of this method is the difficulty with etching, which prevents proper current injection into the semiconductor layer. [15][16][17][18] Please note that the spin-on-glass method is another similar technique. However, our focus in this paper is on the sol-gel method.…”

Section: Sio 2 Formation Methodsmentioning

confidence: 99%

“…High-temperature curing, compared to 500 °C standard temperature, might be able to evaporate polymer content [15][16][17][18][20][21][22][23][24][25][26][27][28][29][30][31] Safe Reasonable None Low > 1000 Difficult Spin-on-glass 19) Safe Reasonable None Low 500 ∼ 1000 Possible…”

Section: High-temperature Curing Elimination Of Polymer Layermentioning

confidence: 99%

Surface improvement investigation of sol–gel SiO₂ cladding for waveguide device passivation

Ogawa

Idris

Han³

et al. 2019

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

The sol-gel method is a well-known process for SiO 2 formation on top of a semiconductor-based waveguide. This method does not require expensive equipment or SiH 4 gas. However, it may result in difficulty with wet-etching, which prevents proper current injection into the semiconductor layer. We have investigated the surface condition of sol-gel SiO 2 on top of Si, and have confirmed that the main causes of the antietching property might be due to the formation of a polymer layer after the curing process. To improve the surface condition, plasma ashing, in addition to 700 °C curing, is proposed. Regular wet etching of SiO 2 layer on Si with a ratio of 1800 nm min −1 has been successfully confirmed.

show abstract

“…The Mode converter designed in [16] converts the TE0 mode to TE2 using enlarged butterfly-shaped phase shifter to make the phase shift equal π. Another technique was introduced in [17] by using bending waveguide to increase the length in waveguide path to satisfy a specific phase difference with the straight waveguide keeping the same width for the two waveguides. In [2], the phase shifter was built by changing width that is slightly larger than the width of the waveguide at the central output of the MMI leading to a change in its propagation constant.…”

Section: Introductionmentioning

confidence: 99%

Optical Phase Shifter Design for Single and Multi-Mode Waveguide Configurations

Wageeh

Sabban

Khalil

2022

Preprint

View full text Add to dashboard Cite

In this paper, we introduce simple design equations for optical phase shifter configurations on both single mode and multimode platforms. The design equations are based on approximate mathematical expressions describing the phase shift (difference) between two waveguides, one is considered as the reference guide and the second is considered as the phase shifter. Different layout geometrical configurations have been studied: the step width and the linear tapering waveguide. The validity of the design formula is tested using standard Beam Propagation Method BPM. The obtained results are in good agreement with numerical calculations and allow using these closed form expressions in the optical design of such phase shifters.

show abstract

Low wavelength dependency design for MMI (multi-mode interference) mode converter

Cited by 9 publications

References 12 publications

Optical mode switch based on multimode interference couplers

Optical mode switch based on multimode interference couplers

Surface improvement investigation of sol–gel SiO₂ cladding for waveguide device passivation

Optical Phase Shifter Design for Single and Multi-Mode Waveguide Configurations

Contact Info

Product

Resources

About

Low wavelength dependency design for MMI (multi-mode interference) mode converter

Cited by 9 publications

References 12 publications

Optical mode switch based on multimode interference couplers

Optical mode switch based on multimode interference couplers

Surface improvement investigation of sol–gel SiO2 cladding for waveguide device passivation

Optical Phase Shifter Design for Single and Multi-Mode Waveguide Configurations

Contact Info

Product

Resources

About

Surface improvement investigation of sol–gel SiO₂ cladding for waveguide device passivation