Optical spectrum analyzers directly measure the wavelength of light in an air environment. However, most wavelength measurements are quoted in terms of wavelengths or optical frequencies in a vacuum. This can lead to errors, particularly in DWDM systems, since the index of refraction of air is a function of wavelength, temperature, pressure, and gas composition. The wavelength dependence of the index of refraction n of standard dry air at 760 torr and 15°C is64 2406030 15997 n =1+ 10*| 8342.13 + air 130 – 1 38.9 where 2 is measured in micrometers.
Optical spectrum analyzers directly measure the wavelength of light in an air environment. However, most wavelength measurements are quoted in terms of wavelengths or optical frequencies in a vacuum. This can lead to errors, particularly in DWDM systems, since the index of refraction of air is a function of wavelength, temperature, pressure, and gas composition. The wavelength dependence of the index of refraction n of standard dry air at 760 torr and 15°C is64 2406030 15997 n =1+ 10*| 8342.13 + air 130 – 1 38.9 where 2 is measured in micrometers.
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:14.1 Optical spectrum analyzers directly measure
the wavelength of light in an air environment.
However, most wavelength measurements
are quoted in terms of wavelengths or optical
frequencies in a vacuum. This can lead to
errors, particularly in DWDM systems, since
the index of refraction of air is a function of
wavelength, temperature, pressure, and gas
composition. The wavelength dependence of
the index of refraction ni, of standard dry air
at 760 torr and 15°C is64
2406030
15997
n =1+ 10 8342.13 +
air
1
38.9 –
1
130 –
where A is measured in micrometers.
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