Arrangement this LED layer is visiblefrom Figure 2. Figure 2: LED Structure Burrus (source: Zanger, 1991) LED Burrus has a choicethis is the efficiency of connectivity very good coating .With AlGaAs material,This LED emits light at λ = 0.82 µm(Singer, 1991, Thomas, 1995). Laser diode (LD) is the source coherent electromagnetic waves that are emitted a gelwave at infrared frequency red ( infra red ) and cahaya tampak ( visible ).
The type of LD used in fiber optic systemsis thatnis semiconductor with uThat darn small, current and supply voltageand low prices which is more expensive, such as ILD ( Injection LaserDiode), LD DFB (distributed feedback ), then LDDBR (distributed bragg reflector) (Zanger, 1991, Thomas, 1995). 4. Channel Couplers Channel coupling is a connecting tool between optical and fiber sources as well Among optical fiber and optical detectors . Power loss that is occur on the common canal couplerI'm sorry by 2 main sections . First is the existencedifference between surface area a source codeoptics (As) withlarge surface core fiber optic(Acore). WhereAcore much smaller than As. This lossstated by (Zanger, 1991):
fiber optic installation jobs
10 logcoreareasALoss A = × (3) For li-shaped surfacesbecause: 20 logcoreareasDLoss D = × (4) Where is Dcore is the diameter of the optical fiber core and Ds is the diameter active optical source. IfAcore more substantial than As, then this loss will not occur. The second cause is numerical differences Aperture (NA) between sources and optical fiber, i.e.the acceptance of fiber that is kecil dthat day the angle that the source radiates . Yesuk sumber optics Lambertian dengan pola radiasi I = IThe x cos θ (where I = intensity at angles θ and I The = maximum intensity at θ = 0), this NA loss stated by (Zanger, 1991): 20 logNALoss NA= × (5) Similarly as with pengcoupling onreceiver. To reduce these losses ,receiver (det optical ector ) must have areaactive surface and angular angleswide impression. 5. Optical Fiber Fiber optics consists ofthree baThe main point iscore, cladding dan coating (Gambar 3). Core is a major part of kar optical fiberena on this coreinformation berupa pulse light transmitted (Zanger, 1991, Thomas, 1995).
The type of LD used in fiber optic systemsis thatnis semiconductor with uThat darn small, current and supply voltageand low prices which is more expensive, such as ILD ( Injection LaserDiode), LD DFB (distributed feedback ), then LDDBR (distributed bragg reflector) (Zanger, 1991, Thomas, 1995). 4. Channel Couplers Channel coupling is a connecting tool between optical and fiber sources as well Among optical fiber and optical detectors . Power loss that is occur on the common canal couplerI'm sorry by 2 main sections . First is the existencedifference between surface area a source codeoptics (As) withlarge surface core fiber optic(Acore). WhereAcore much smaller than As. This lossstated by (Zanger, 1991):
fiber optic installation jobs
10 logcoreareasALoss A = × (3) For li-shaped surfacesbecause: 20 logcoreareasDLoss D = × (4) Where is Dcore is the diameter of the optical fiber core and Ds is the diameter active optical source. IfAcore more substantial than As, then this loss will not occur. The second cause is numerical differences Aperture (NA) between sources and optical fiber, i.e.the acceptance of fiber that is kecil dthat day the angle that the source radiates . Yesuk sumber optics Lambertian dengan pola radiasi I = IThe x cos θ (where I = intensity at angles θ and I The = maximum intensity at θ = 0), this NA loss stated by (Zanger, 1991): 20 logNALoss NA= × (5) Similarly as with pengcoupling onreceiver. To reduce these losses ,receiver (det optical ector ) must have areaactive surface and angular angleswide impression. 5. Optical Fiber Fiber optics consists ofthree baThe main point iscore, cladding dan coating (Gambar 3). Core is a major part of kar optical fiberena on this coreinformation berupa pulse light transmitted (Zanger, 1991, Thomas, 1995).
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