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Near field scanning
| Fiber Optic Glossary |
A technique for measuring the refractive-index profile of an optical fiber by using an extended source to illuminate an endface and measuring the point-by-point radiance at the exit face.
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Refractive, английский
Illuminate, английский
- To direct radar at a target for weapons guidance purposes (cf. paint).
- Cast light on (something).
- Cast light on (something). compare illuminance.
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Pulse-code modulation (pcm), английский
A technique in which an analog signal, such as a voice, is converted into a digital signal by sampling the signal`s amplitude and expressing the different amplitudes as a binary number. the sampling rate must be at least twice the highest frequency in the signal.
Bragg grating, английский
A technique for building optical filtering functions directly into a piece of optical fiber based on interferometric techniques. usually this is accomplished by making the fiber photosensitive and exposing the fiber to deep uv light through a grating. this forms regions of higher and lower refractive indices in the fiber core.
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