Ditemukan 16 dokumen yang sesuai dengan query
Agus Rubiyanto
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ABSTRACT
A non-mechanical method of measuring temporally coherent light, which may be dominated by incoherent background radiation, has been developed. The measurement method is based on the modulated signal produced by the temporally coherent radiation through a LiTaO3 crystal.
In the study, the coherent and incoherent lights are combined. To detect coherent light in the presence of incoherent radiation, the crystal is modulated with 2 KHz to 25 KHz sinusoidal signals. To obtain good modulation, the ...
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1993
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UI - Tesis Membership Universitas Indonesia Library
Rajagoekgoek, Herbert H.
Depok: Universitas Indonesia, 1992
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UI - Tesis Membership Universitas Indonesia Library
A. Juliati Junde
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With the growth of optical communications using Low toss optical. fibers. the need for an optical switching system that exchanges optical. signals without any optoelectric and electro optic converter may arise. In this study, an experimental model of sliding prism switch using planar micro lens array has been constructed. The performance of the constructed switching device was studied by measuring insertion Loss. coupling efficiency and cross talk. The experiment shows that the measured results of ...
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Depok: Universitas Indonesia, 1992
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Heri Saptono Warpindyasmoro
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A design of novel optical power divider with tapered coupled wave-guide structure is proposed. The structure of optical power divider is directional coupler, which consists of parallel tapered wave-guide. The device was designed and its feature was simulated by the beam propagation method (BPM). Unique power coupling characteristics are demonstrated. A special case of a 1 x 3 Optical Power Divider has been designed. Simulation of the output power distribution at a wavelength of 1.31 ...
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Depok: Universitas Indonesia, 1994
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Mufti Gafar
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ABSTRAK
In transmission system, the information to be transmitted from one source to several addressed receivers requires a component to distribute the information. To achieve an efficient and simple distribution circuit of information, a study on the use of fiber as information signal distributor without using other optical elements has been developed as a fiber star-coupler. The optical fiber star-coupler was constructed by chemically processing the end face of fiber into a cone-shaped. The process was ...
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1991
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Bualkar Abdullah
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ABSTRACT
In optical communication system, optical star coupler devices are important for distributing optical signal from one incoming fiber into several outgoing fibers. In this research, an investigation on the design of optical fiber star coupler has been carried out by the use of simple way. Utilizing the cone-shaped end face of several fibers as receivers, optical star coupler has been constructed without using any optical element .An experiment to examine the efficiency of coupling light power ...
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1990
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Andi Djalal Latief
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ABSTRAK
Specific performance of an optical waveguide can be achieved by solving the eigen value equation of the respective waveguide. A numerical method to obtain dispersion characteristics of a planar waveguide has been executed on a computer program which run on IBM PC or its compatible with 640 KB memory. Coupler prism method was used to measure the waveguide parameters. A focused beam of TE or TM polarized mode of
He-Ne laser light ...
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1991
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UI - Tesis Membership Universitas Indonesia Library
Sholeh Hadi Pramono
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A study on the design and construction of measurement system of electric current of power line has been carried out. The electromagnetic induction on inductor placed near a power line was used as modulator signal of laser diode. The modulator signal in frequency signal form is obtained by converting the amplitude of induced voltage into frequency signal by voltage-to-frequency converter. The optical light of laser diode modulated by the frequency signal was transmitted by optical ...
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Depok: Universitas Indonesia, 1990
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Endang Susilo Rahayuningtijas
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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 ...
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Depok: Universitas Indonesia, 1994
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Nasrun Lubis
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In signal transmission through an optical fiber, a bending fiber causes degradation of efficiency. Due to mode conversion and radiation loss. Considering a light power radiated from a bending fiber has a possibility to be utilized as detectable signal, it is proposed an optical tap by using bending fiber.
The study is devoted to design and construction of optical tap for fiber link, without any other optical element. The signal quality of the radiated light from ...
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Depok: Universitas Indonesia, 1989
T-Pdf
UI - Tesis Membership Universitas Indonesia Library
