Optical Power Splitter Based on Single Mode Directional Coupler Waveguide Using SnO2 Nanomaterial

Abstract Optical power splitter based on waveguide had been simulated numerically using Finite Difference Beam Propagation Method (FDBPM). Proposed waveguide was designed in the form of simple directional coupler waveguide. The waveguide was contained SnO2 nanomaterial as film or the guide part and the other supporting material as cladding with lower refractive index such as flint glasses. The waveguide used 2 μm of width to establish single-mode waveguide. The structure of waveguide is divided into three parts such as input, coupling and output part. While the waveguide was modified with angle in input and output parts to avoid coupling between waveguides. Furthermore, the proposed waveguide was analysed by varying the angle and coupling length. The analysed result shows that the waveguide has best performance in angle of 0.5 degrees and coupling length of 300 μm when the propagation loss was around 0.53%. Using the parameter, the output distribution percentage of waveguide approached 55%:44.5%. This performance indicated that the proposed waveguide can be used as optical power splitter. The application is very useful for optical telecommunication networking development.

Download Full-text

Design and Simulation of asymmetrical Y- branch optical power splitter on SOI platform and Study the propagation loss with branching angle, index difference, and slab height

13th International Conference on Fiber Optics and Photonics ◽

10.1364/photonics.2016.w3a.44 ◽

2016 ◽

Cited By ~ 1

Author(s):

NagaRaju Pendam

Keyword(s):

Optical Power ◽

Propagation Loss ◽

Power Splitter ◽

Branching Angle

Download Full-text

S-Bend Silicon-On-Insulator (SOI) Large Cross-Section Rib Waveguide for Directional Coupler

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v7i6.pp3299-3305 ◽

2017 ◽

Vol 7 (6) ◽

pp. 3299

Author(s):

Nurdiani Zamhari ◽

Abang Annuar Ehsan ◽

Mohd Syuhaimi Abdul Rahman

Keyword(s):

Cross Section ◽

Directional Coupler ◽

Beam Propagation Method ◽

Single Mode ◽

Silicon On Insulator ◽

Large Cross Section ◽

Rib Waveguide ◽

Passive Devices ◽

The Right ◽

Future Work

S-bend contributes the high losses in the silicon-on-insulator (SOI) large cross-section rib waveguide (LCRW). The objective of this work is to investigate S-bend SOI LCRW with two different single-mode dimensions named symmetrical and asymmetrical. The S-bend SOI LCRW has been simulating using beam propagation method in OptiBPM software. The asymmetrical waveguide with two different dimension arc given the best performance if compared to others dimension with 3 µm of waveguide spacing. It achieved 92.24% and 91.10% of normalized output power (NOP) for 1550 nm and 1480 nm wavelength respectively. Moreover, the minimum of S-bend spacing between the two cores is 0.9 µm for both 1550 nm and 1480 nm. Therefore, asymmetrical waveguide with two different dimension arc and 0.9 µm of S-bend spacing are chosen. This analysis is important to determine the right parameter in order to design the SOI passive devices. However, future work should be done to see the performance by designing the coupler and implement in the real system.

Download Full-text

MODELING AND DESIGN OF REALISTIC Si3N4-BASED INTEGRATED OPTICAL PROGRAMMABLE POWER SPLITTER

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863510005236 ◽

2010 ◽

Vol 19 (02) ◽

pp. 255-268

Author(s):

H. P. URANUS ◽

H. J. W. M. HOEKSTRA ◽

R. STOFFER

Keyword(s):

Phase Shift ◽

Directional Coupler ◽

Phase Shifter ◽

Optical Power ◽

Power Splitting ◽

Device Structure ◽

Power Splitter ◽

Splitting Ratio ◽

Integrated Optical ◽

Mode Solver

Controllable splitting of optical power with a large splitting ratio range is often required in an integrated optical chip, e.g. for the readout of phase-shift in a slow-light sensor. In this work, we report the modeling and design of an integrated optical programmable power splitter consisting of a Y-junction with a programmable phase-shifter cascaded to a directional coupler. We used a vectorial mode solver, and a combination of a transfer matrix method with a 3D vectorial coupled-mode theory (CMT) to compute the power transfer ratio of a realistic device structure made of Si 3 N 4, TEOS, and SiO 2 grown on a Si substrate. In the simulations, waveguide attenuation values derived from the measured attenuation of a prefabricated test wafer, have been taken into account. Vectorial modal fields of individual waveguides, as computed by a mode solver, were used as the basis for the CMT computation. In the simulation, an operational wavelength around 632.8 nm was assumed. Our simulations reveal that maximum power splitting ratio can be achieved when the directional coupler is operated as a 3-dB coupler with the phase-shifter set to produce a 90° phase-shift. The required coupler length for such desired operating condition is highly-dependent on the gap size. On the other hand, the inclusion of the waveguide loss and the non-parallel section of the directional coupler into the model only slightly affect the results.

Download Full-text

A Simple Three Branch Optical Power Splitter Design based on III-Nitride Semiconductor for Optical Telecommunication

International Journal of Technology ◽

10.14716/ijtech.v7i4.3172 ◽

2016 ◽

Vol 7 (4) ◽

pp. 701 ◽

Cited By ~ 4

Author(s):

Retno Wigajatri Purnamaningsih ◽

Nyi Raden Poespawati ◽

Elhadj Dogeche ◽

Dimitris Pavlidis

Keyword(s):

Optical Power ◽

Optical Telecommunication ◽

Power Splitter ◽

Nitride Semiconductor

Download Full-text

Nonlinear Coherent Directional Coupler: Coupled Mode Theory and BPM Simulation

International Journal of Optics ◽

10.1155/2012/173250 ◽

2012 ◽

Vol 2012 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Dharmadas Kumbhakar

Keyword(s):

Directional Coupler ◽

Critical Power ◽

Beam Propagation Method ◽

Numerical Procedure ◽

Optical Power ◽

Coupled Mode Theory ◽

Step Size ◽

Coupling Region ◽

Mode Theory ◽

Coupled Mode

Finite difference beam propagation method is an accurate numerical procedure, used here to explore the switching dynamics of a nonlinear coherent directional coupler. The coupling lengths derived from this simulation are compared with coupled mode theories. BPM results for the critical power follow the trend of the coupled mode theories, but it lies in between two coupled mode theories. Coupled mode theory is sensitive to numerical approximations whereas BPM results practically do not depend on grid size and longitudinal step size. Effect of coupling-region-width and core-width variations on critical power and coupling length is studied using BPM to look at the aspects of optical power-switch design.

Download Full-text

All-optical switching in a GaAs-based multiple quantum well directional coupler

Canadian Journal of Physics ◽

10.1139/p89-072 ◽

1989 ◽

Vol 67 (4) ◽

pp. 408-411 ◽

Cited By ~ 4

Author(s):

B. P. Keyworth ◽

M. Cada ◽

J. M. Glinski ◽

A. J. SpringThorpe ◽

P. Mandeville

Keyword(s):

Quantum Well ◽

Optical Switching ◽

Directional Coupler ◽

Multiple Quantum Well ◽

Optical Power ◽

Planar Waveguides ◽

Coupling Length ◽

Multiple Quantum ◽

All Optical ◽

All Optical Switching

The nonlinear, all-optical switching characteristics of a GaAs-based directional coupler are investigated. The structure consists of two Al0.18Ga0.82As planar waveguides coupled through a GaAs–AlGaAs multiple quantum well (MQW) layer. Changing the refractive index of the MQW layer, through a Kerr-type nonlinearity, varies the coupling length of the element, which in turn determines the distribution of optical power at the output of the sample. Our theoretical analysis of the element predicted that a strong nonlinear switching effect should be observed near the critical power, Pc, for samples cleaved to the appropriate length. This has been verified experimentally, for the first time with such a structure, and reveals a full-transfer coupling length of approximately 160 μm and a critical launched power of approximately 750 μW.

Download Full-text