Download Analog Optical Links: Theory and Practice by Charles H. Cox III PDF

By Charles H. Cox III

In contrast to books that concentrate on the units utilized in hyperlinks, equivalent to lasers and photodiodes, between others, this article makes a speciality of the following point. It covers the gathering of units that shape a hyperlink, how the person equipment functionality impacts the hyperlink functionality, or the opposite. Analog hyperlinks are used for the distribution of cable television signs, and in conveying the signs to and from antennas (so known as antenna remoting). The layout of analog hyperlinks differs considerably from electronic hyperlinks that are basically utilized in telecommunications.

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8 VS2 .

16) Now that we have the incremental modulation efficiency for the MZM, getting its slope efficiency is easy. 11). This can be done by simply moving RS into the squared term and then dividing the result by RS : 2 pm,o = ps,a TFF PI π RS 2Vπ 2 1 . 17) The squared term with RS included now has the units of (W/A)2 which are the units of slope efficiency squared. 11) if we denote MZM fiber-coupled slope efficiency, smz , as smz VM = Vπ 2 = TFF PI π RS . 18) is valid only at a particular bias point.

When an electrical modulation voltage, vm , is applied to the modulator in addition to a dc bias voltage, VM , the total instantaneous modulator voltage can be written as vM = VM + vm . 12) and expanding the cosine sum yields pM,O = π vm TFF PI π VM cos 1 + cos 2 Vπ Vπ − sin π VM π vm sin Vπ Vπ . 13). 38 Link components and their small-signal electro-optic models To proceed with the derivation of an expression for pm,o , we need to choose a specific bias voltage. There are any number of bias voltages we could choose, depending on the link parameter we are trying to maximize.

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