A compact and low‐loss 1 × 2 wavelength MUX/DEMUX based on a multimode‐interference coupler using quasi state

Sam, Y. L.; Won, Yong Hyub

doi:10.1002/mop.20055

Cited by 10 publications

(8 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By increasing the wavelength of the signal, the output image of the MMI moves gradually from the cross-output port to the upper position until it reaches the baroutput port. This phenomenon is referred to as the quasi-bar state (QS), where the MMI length is shorter than the actual MMI length (2L MMI ) for coupling the input signal into the bar state [4]. It is demonstrated that the coupling loss and the crosstalk of the QS bar state can be as good as the actual bar state.…”

Section: Principle Of Device Operationmentioning

confidence: 98%

1 × 3 wavelength demultiplexer based on multimode interference with an index‐modulation region

Sam¹,

Won²

2004

Micro & Optical Tech Letters

Self Cite

View full text Add to dashboard Cite

It is obvious that the main advantage of the filter proposed in this paper is its flexibility. To achieve a different stop band, the applied DC magnetic intensity needs to be varied. Figure 12(a) presents the transmission spectra when the applied DC magnetic field in the left and right discontinuity are H 0 ϭ 0.5E12 and H 0 ϭ 3E12, respectively, and Figure 12(b) shows the characteristics when the applied DC magnetic field in the left and right discontinuity are H 0 ϭ 6E12 and H 0 ϭ 3E12, respectively. CONCLUSIONIn this paper, the scattering characteristics of electromagnetic devices with ferrite-cylinder defects have been studied by using the scattering-matrix method. The studies have demonstrated that, due to the embedded ferrite material, the scattering characteristics become adjustable. Two couplers with ferrite cylinders were examined, and it was shown that the transmission frequency range can be adjusted according to the specific requirements. They were found to be more flexible than devices with only dielectric cylinders. In addition, a Y-branch filter has been investigated; by adjusting the applied DC magnetic-field intensity of the different branches, we can obtain electromagnetic waves with desired frequency bands in desired ports. -8 (1960 1. W.H. Eggimann, Scattering of a plane wave on a ferrite cylinder at normal incidence, IRE Trans Microwave Theory Tech MTT

show abstract

Section: Principle Of Device Operationmentioning

confidence: 98%

1 × 3 wavelength demultiplexer based on multimode interference with an index‐modulation region

Sam¹,

Won²

2004

Micro & Optical Tech Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…the flexibility to design a MMI based MUX/DEMUX for By using the Quasi State concept [9] we are able to separate two wavelengths in significantly shorter length. If the first the setiof wavel by an in orderopovero the limitation imposed by equation 4, we propose to cross state of wavelength 2, is formed at z = pL,1 and geometrically modify MMI region to achieve high device (p+q)Lg2 .…”

Section: Principle Of Devicementioning

confidence: 99%

“…Several MMI structures have where Pbar and Pcross are the output intensity at bar and cross been proposed for wavelength MUX/DEMUX in a WDM states, Pout is output intensity at each port, and Pin is the system using the concept of quasi state [9][10]. These input intensity for a particular wavelength.…”

Section: Principle Of Devicementioning

confidence: 99%

“…characterized by their compact sizes, polarization The goal of this work is to use well known MMI structure insensitivity and fabrication tolerance. Several MMI and SiON material as core and cladding to define a novel structures have been proposed for wavelength MUX/DEMUX structure such that a low loss, high MUX/DEMUX in a WDM system [9][10]. These devices are extinction ratio is achieved.…”

mentioning

confidence: 99%

“…Various types of WDMs and WDDMs have been geometrical changes usually suffer from high loss and low proposed and demonstrated [1][2][3][4][5][6][7] such as Multimode extinction ratio and only work for two broadly separated interference (MMI) structures [8]. .MMIs [9] are mainly wavelengths [14]. characterized by their compact sizes, polarization The goal of this work is to use well known MMI structure insensitivity and fabrication tolerance.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Geometrically modified multimode interference waveguides using high refractive index SiON material, for application in wavelength multiplexing/demultiplexing

Mayeh

Farahi

2008

2008 International Symposium on High Capacity Optical Networks and Enabling Technologies

View full text Add to dashboard Cite

Wavelength multiplexing/demultiplexing devices are based on change in the geometry of the MMI devices are considered to be one of the key elements in region. This would enable the designer to optimize device optical networks. Here we propose a new class of performances for a given set of refractive indices and wavelength MUX/DEMUX devices which are based on arbitrary pair of wavelengths. Designs of MUX and change in the geometry of the multimode interference DEMUX in the communication range will be presented. It (MMI) waveguide region. This modification enables us will be shown that modification in geometry of MMI device to optimize device performances for a given set of will lead to a better performance relative to simple MMI refractive indices of core and cladding. The material of devices. The material of choice is Silicon Oxynitride (SiON) choice is SiON since it has an excellent surface which is one of the commonly used materials in the morphology for the optical device application and its integrated optical circuits [11]. By using well-established index of refraction can be varied from as low as 1.45 to PECVD methods [12] to deposit the layers of SiON on as high as 2.5. A few designs for compact wavelength silicon wafers, we achieve a large flexibility in the refractive MUX/DEMUX based on off-center-fed excitement in index and hence waveguide design. The nitrogen-to-oxygen Geometrically Modified MMI (GMM) are presented. ratio in Plasma Enhanced Vapor Deposition (PECVD) Results show that modification in geometry of MMI process can be varied continuously and refractive indices of device will lead to the better performances relative to core and cladding can be controlled over a significant range: simple MMI devices.from silicon oxide having a refractive index of 1.45 at one extreme to silicon nitride having a refractive index of almost 1. INTRODUCTION 2 or even higher at the other [13]. Hence, the index contrast Wavelength division multiplexing (WDM) and of the waveguide can be adjusted, ranging from the low demultiplexing (WDDM) devices are considered to be one contrast of fiber-matched processes to the high contrast of of the key elements for enhancing the transmission the waveguides of compound semiconductor structures. bandwidth of optical communications. During the past 20 Previously demonstrated designs which are based on years. Various types of WDMs and WDDMs have been geometrical changes usually suffer from high loss and low proposed and demonstrated [1-7] such as Multimode extinction ratio and only work for two broadly separated interference (MMI) structures [8]. .MMIs [9] are mainly wavelengths [14]. characterized by their compact sizes, polarization The goal of this work is to use well known MMI structure insensitivity and fabrication tolerance. Several MMI and SiON material as core and cladding to define a novel structures have been proposed for wavelength MUX/DEMUX structure such that a low loss, high MUX/DEMUX in a WDM system [9-10]. These devices are extinction ratio is achieved. We expect thi...

show abstract

3D Optical Splitter based on MMI

Mizera

Pudiš

Kuzma

et al. 2021

Transportation Research Procedia

View full text Add to dashboard Cite

A compact and low‐loss 1 × 2 wavelength MUX/DEMUX based on a multimode‐interference coupler using quasi state

Cited by 10 publications

References 9 publications

1 × 3 wavelength demultiplexer based on multimode interference with an index‐modulation region

1 × 3 wavelength demultiplexer based on multimode interference with an index‐modulation region

Geometrically modified multimode interference waveguides using high refractive index SiON material, for application in wavelength multiplexing/demultiplexing

3D Optical Splitter based on MMI

Contact Info

Product

Resources

About