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Pulse-code modulation (pcm)
| Fiber Optic Glossary |
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.
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Cross-gain modulation (xgm), английский
A technique used in wavelength converters where gain saturation effects in an active optical device, such as a semiconductor optical amplifier (soa), allow the conversion of the optical wavelength. better at shorter wavelengths (e.g. 780 nm or 850 nm).
Near field scanning, английский
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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