331:
247:. This repeats on every bounce within the fiber core, and so the light is confined to the core. The confinement of light by the fiber can also be described in terms of bound modes or guided modes. This treatment is necessary when considering
132:
335:
199:
226:
243:. Light that enters the core with an angle below the acceptance angle strikes the core-cladding boundary at an angle above the critical angle, and experiences
61:
340:
265:
298:
308:
346:
244:
251:, since the ray model does not accurately describe the propagation of light in this type of fiber.
33:
178:
37:
240:
208:
367:
8:
127:{\displaystyle \theta <\arcsin \left({\sqrt {n_{0}^{2}-n_{\mathrm {c} }^{2}}}\right)}
280:
260:
202:
44:
304:
248:
51:
of the fiber, that is if it makes an angle with the fiber axis that is less than the
350:
159:
236:
361:
29:
47:, light entering the fiber will be guided if it falls within the
211:
181:
64:
220:
193:
126:
359:
145:is the angle the ray makes with the fiber axis,
162:along the central axis (core) of the fiber, and
300:Fiber Optic Lighting: A Guide for Specifiers
171:is the refractive index of the cladding.
360:
296:
266:Acceptance angle (solar concentrator)
13:
107:
14:
379:
334: This article incorporates
329:
268:, same construct for another use
235:This result can be derived from
347:General Services Administration
290:
1:
272:
194:{\displaystyle \sin \theta }
7:
303:. The Fairmont Press, Inc.
297:DeVeau, Russell L. (2000).
254:
205:of the fiber. The quantity
36:, which is confined by the
10:
384:
245:total internal reflection
228:is sometimes called the
221:{\displaystyle 2\theta }
34:multi-mode optical fiber
342:Federal Standard 1037C
336:public domain material
281:Federal Standard 1037C
230:total acceptance angle
222:
195:
128:
223:
196:
129:
209:
179:
62:
239:by considering the
149:entering the fiber,
117:
97:
261:Numerical aperture
218:
203:numerical aperture
191:
124:
101:
83:
249:single-mode fiber
118:
375:
355:
354:
349:. Archived from
333:
332:
322:
321:
319:
317:
294:
227:
225:
224:
219:
200:
198:
197:
192:
160:refractive index
133:
131:
130:
125:
123:
119:
116:
111:
110:
96:
91:
82:
53:acceptance angle
45:step index fiber
383:
382:
378:
377:
376:
374:
373:
372:
358:
357:
339:
330:
328:
326:
325:
315:
313:
311:
295:
291:
275:
257:
210:
207:
206:
180:
177:
176:
170:
157:
112:
106:
105:
92:
87:
81:
77:
63:
60:
59:
49:acceptance cone
12:
11:
5:
381:
371:
370:
353:on 2022-01-22.
324:
323:
309:
288:
287:
286:
285:
284:
283:
274:
271:
270:
269:
263:
256:
253:
241:critical angle
232:of the fiber.
217:
214:
190:
187:
184:
173:
172:
168:
163:
155:
150:
136:
135:
122:
115:
109:
104:
100:
95:
90:
86:
80:
76:
73:
70:
67:
32:of light in a
9:
6:
4:
3:
2:
380:
369:
366:
365:
363:
356:
352:
348:
344:
343:
337:
312:
310:0-88173-325-3
306:
302:
301:
293:
289:
282:
279:
278:
277:
276:
267:
264:
262:
259:
258:
252:
250:
246:
242:
238:
233:
231:
215:
212:
204:
188:
185:
182:
175:The quantity
167:
164:
161:
154:
151:
148:
144:
141:
140:
139:
120:
113:
102:
98:
93:
88:
84:
78:
74:
71:
68:
65:
58:
57:
56:
54:
50:
46:
41:
39:
35:
31:
27:
23:
19:
368:Fiber optics
351:the original
341:
327:
314:. Retrieved
299:
292:
234:
229:
174:
165:
152:
146:
142:
137:
52:
48:
42:
25:
21:
17:
15:
237:Snell's law
26:trapped ray
316:14 October
273:References
18:guided ray
216:θ
189:θ
186:
99:−
75:
66:θ
22:bound ray
362:Category
255:See also
201:is the
158:is the
28:) is a
307:
147:before
138:where
72:arcsin
20:(also
338:from
318:2016
305:ISBN
69:<
43:For
38:core
183:sin
30:ray
24:or
364::
345:.
55:,
40:.
16:A
320:.
213:2
169:c
166:n
156:0
153:n
143:θ
134:,
121:)
114:2
108:c
103:n
94:2
89:0
85:n
79:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.