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Abstrak :
Skripsi ini membahas pengembangan dan penggunaan power splitter dalam sistem komunikasi GSM indoor. Telah dirancang suatu power splitter dengan mengunakan transformator _x0002_/4 dari Parad dan Moynihan. Bahan yang digunakan adalah PCB (Printed Circuit Board) jenis FR4 (permitivitas relatif = 4,5 dan tebal dielektrik = 1,6 mm). Metode yang digunakan untuk merancang power splitter adalah metode stripline, dengan pertimbangan stripline lebih mudah difabrikasi dibandingkan saluran transmisi lain seperti coaxial.

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The focus of this final project is to describe the development and the use of power splitter in GSM indoor communication system. A power splitter using l/4 _x0002_ transformer from Parad and Moynihan is designed and implemented. The material used is FR4 PCB (Printed Circuit Board), (relative permitivity = 4,5 and dielectric thickness = 1,6 mm). Stripline is selected as the method to build power splitter, because it is easier for fabrication as compared to other transmission lines such as coaxial.

Abstrak :
Kebutuhan akan divais optik terus mengalami peningkatan yang cukup pesat belakangan ini. Material Gallium Nitride merupakan material yang menarik banyak peneliti, karena memiliki beberapa kelebihan, antara lain: stabil terhadap perubahan suhu, memiliki tingkat epitaxial growth yang tinggi, konsumsi daya yang rendah dan memiliki direct band gap yang tinggi. Namun riset dibidang passive waveguide hingga kini belum banyak ditekuni para peneliti. Oleh karena itu, pada skripsi ini, dikembangkan power splitter dengan rugi-rugi yang rendah dan memiliki distribusi medan optik yang uniform, dengan memanfaatkan bentuk pandu gelombang S-Bend. Desain Y-branch power splitter dilakukan dengan menggunakan OptiBPM 12 free trial. Dari hasil simulasi diperoleh Y-branch power splitter terbaik saat tebal dan lebar pandu gelombang lurus adalah 4 μm, panjang pandu gelombang multimode sebesar 25 μm dan radius pandu gelombang S-Bend 10,5 μm. ...... Recently, demand of optical devices are growing termendously, Gallium Nitride is become attractive by many researchers, because of its advantages, such as: temperature stability, high rate of epitaxial growth, low power consumption and large direct band gap. But nowadays, there is not much research about passive waveguide GaN based. Thats why, this final project of Y-branch power splitter which has low power consumption and uniformity of distribution optical waveguides distribution using S-Bend waveguides is designed. OptiBPM 12 free trial is used for the design purpose in this final project. From the simulation, it can be concluded that the best S-Bend Y-branch power splitter is when straight waveguide both thickness and width are 4 μm, multimode waveguide length is 25 μm and radius of S-Bend is 10,5 μm.

Abstrak :
Inthis paper, we propose a 1x2 and 1x4 optical power splitter from 1500 to 1600 nm based on multimode interference (MMI) structure with tapered input and output waveguides. The results obtained from modal propagation analysis (MPA) and beam propagation method (BPM) show better performance of the tapered structures than that of without taper in term of the power imbalance and insertion loss by 44.94% and 32.50% for 1x2 and 21.18 and 73.03% for 1x4 respectively. These suggest that the proposed structures may be a better candidate foe efficient wideband optical signal processing and communication.

Abstrak :
Experimental study on fiber power-splitter using a grating is described. Special attention is paid to the splitting ratio. Experiments were performed with a simple grating confirming the theoretical prediction Double passing of the grating results in a selectable splitting ratio of 5:7. Grating is made by photographic technique. Parameter b (width of slit) and d (period) of grating are designed with computer simulation.

Abstrak :
Recently, gallium nitride (GaN) material has attracted the attention of researchers as a candidate for third generation semiconductor material for optical telecommunication applications. In this research, a 2x2 multimode interference optical power splitter (MMI) based on a waveguide and ridge structure is proposed using gallium nitride material on a silicon (GaN/Si) substrate for optical telecommunication applications. The design optimization carried out resulted in two optical power splitter designs based on rib (design A) and ridge (design D) waveguide. Based on the simulation using the eigenmode expansion method (EME) algorithm, design A has an optimal dimension of 15 m 212 m with an insertion loss of 0.085 dB, power balancing of 0.007 dB, C-band (1530 nm – 1565 nm) broadband bandwidth of 0.140 dB, and fabrication tolerances for width and length are ± 0.3 m and ± 0.5 m, respectively. Meanwhile, design D has optimal dimensions of 15 m 214 m with insertion loss of 0.036 dB, power balancing of 0.017 dB, C-band broadband bandwidth of 0.088 dB, and fabrication tolerances for width and length respectively. of ± 0.3 m and ± 0.5 m

Abstrak :
We propose a simple design of 1×3 optical power splitter which uses gallium nitride (GaN) on sapphire. The design consists of widely used large cross section input rib waveguide, a rectangular multimode interference (MMI) structure, and three-branch rib waveguides. The MMI structure is selected since their attractive performances, such as compactness, low excess loss, wide bandwidth and ease to fabricate. The power splitter is designed for the third telecommunication window, i.e., l = 1.55 µm. Optimization of the geometrical structure parameters for the design is conducted theoretically utilizing 3D FD-BPM method. It is found that the power splitter exhibits excess loss of 0.46 dB and imbalanced of 0.001 dB at l = 1.55 µm for ...

Abstrak :
We propose a simple design of 1×3 optical power splitter which uses gallium nitride (GaN) on sapphire. The design consists of widely used large cross section input rib waveguide, a rectangular multimode interference (MMI) structure, and three-branch rib waveguides. The MMI structure is selected since their attractive performances, such as compactness, low excess loss, wide bandwidth and ease to fabricate. The power splitter is designed for the third telecommunication window, i.e., l = 1.55 µm. Optimization of the geometrical structure parameters for the design is conducted theoretically utilizing 3D FD-BPM method. It is found that the power splitter exhibits excess loss of 0.46 dB and imbalanced of 0.001 dB at l = 1.55 µm for

Abstrak :
In line with the increasing need for higher performance for optical and photonic telecommunications equipment at the lowest possible cost, the need for supporting equipment is also increasing. One of these components is an optical power splitter. This component is needed in network systems to distribute light to other components, especially multi-channel optical power separators to support larger network systems. One of the materials developed as a photonic device material from group III-nitride is gallium nitride (GaN). Besides having a large direct bandgap (3.4eV), GaN also has good resistance to temperature changes. Thus, GaN-based power splitters are an interesting research topic to obtain more improvements, innovations and inventions for future demands. In this research, an optical power splitter design is proposed based on the 1 × 8 multimode interference (MMI) structure. The design has been carried out theoretically using 3D FD-OptiBPM on GaN material. Structural modeling using 300 nm AlN and 200 nm AlGaN as a buffer layer on a sapphire substrate material. Numerical experiments were carried out at the optical telecommunications wavelength at = 1.55 m with the effective refractive index of the coating used =2.279±0.001 and =2.316±0.001. The results showed that the optimum width and thickness of the rectangular input channel and taper-shaped output channel was 4 m, and only supported single mode propagation. From the experimental simulation results, it is shown that the MMI-based optical power separator with a total length of 2010 m and a width of 85 m is the best result. It is also shown that the output power is split almost uniformly into eight output channels with a relative output power of 0.96 on the output channel, 0.28 dB of excess loss and 0.28 dB of power imbalance. 13 dB.