Handbook for Sound Engineers

452 Chapter 15 The practical use of fiber optics for communications began in the mid- and late 1970s with test trials. However, ...

Transmission Techniques: Fiber Optics 453 The velocity of electromagnetic energy in free space is generally called the speed of ...

454 Chapter 15 between the two descriptions, depending on our needs. For example the characteristics of many optical fibers vary ...

Transmission Techniques: Fiber Optics 455 the relationship between incident and reflected light as shown in Fig. 15-6. Snell’s L ...

456 Chapter 15 are usually not included in practical fiber analysis. The exact characteristics of light propagation depend on th ...

Transmission Techniques: Fiber Optics 457 to let all waves arrive in unison and greatly increase the received intensity (power). ...

458 Chapter 15 Strength members provide for better tensile load parameters similar to coax or electrical audio cables. An optica ...

Transmission Techniques: Fiber Optics 459 operation. Making the best use of the low-loss proper- ties of the fiber requires that ...

460 Chapter 15 around tight corners without any discernible increase in the fiber’s attenuation. There are several names given t ...

Transmission Techniques: Fiber Optics 461 graded-index fibers. A large NA promotes more modal dispersion, since more paths for t ...

462 Chapter 15 Testing fiber optic continuity is important for system function checks. This test for continuity is simple and do ...

Transmission Techniques: Fiber Optics 463 of fiber certification and diagnostics. The companion PC software documents, reports, ...

464 Chapter 15 ditions, to place a microscopic glass bead that acts as a lens on top of the diode’s microchip structure. This mi ...

Transmission Techniques: Fiber Optics 465 1300 nm (second window) or around 1550 nm (third window). The choice is dictated by: ...

466 Chapter 15 Highly directional: The light is emitted in a highly directional pattern with little divergence. Diver- gence is ...

Transmission Techniques: Fiber Optics 467 wavelength of 820 nm and a spectral width of 30 nm, its output ranges from 805 nm to 8 ...

468 Chapter 15 The characteristics of typical detectors are shown in Table 15-4. 15.6.1 Quantum Efficiency (K) Quantum efficienc ...

Transmission Techniques: Fiber Optics 469 equivalent to a low-pass RC filter yields an approxima- tion of its bandwidth. Fig. 15 ...

470 Chapter 15 15.9 The Fiber Optic Link A basic fiber optic link, as shown in Fig. 15-28, consists of an optical transmitter an ...

Transmission Techniques: Fiber Optics 471 four main causes of loss that a connector or splice must control are: Lateral displac ...