Agilent Technologies 81680A Guide de l'utilisateur télécharger pdf (Page 84)

Cleaning Information Why is it important to clean optical devices?

84 Agilent 81618A/9A and Agilent 81623B/4B/6B/8B Optical Heads, Fourth Edition

Why is it important to clean

optical devices?

In transmission links optical fiber cores are about 9 µm (0.00035") in

diameter. Dust and other particles, however, can range from tenths to

hundredths of microns in diameter. Their comparative size means that they

can cover a part of the end of a fiber core, and as a result will reduce the

performance of your system.

Furthermore, the power density may burn dust into the fiber and cause

additional damage (for example, 0 dBm optical power in a single mode

fiber causes a power density of approximately 16 million W/m

). If this

happens, measurements become inaccurate and non-repeatable.

Cleaning is, therefore, an essential yet difficult task. Unfortunately, when

comparing most published cleaning recommendations, you will discover

that they contain several inconsistencies. In this section, we want to

suggest ways to help you clean your various optical devices, and thus

significantly improve the accuracy and repeatability of your lightwave

measurements.

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Agilent Technologies 81680A Guide de l'utilisateur Page 84