Output photons rl Figure 17.2-6 Geometry of a simple semi conductor optical ampl

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Output photons rl Figure 17.2-6 Geometry of a simple semi conductor optical amplifier. Charge carriers travel perpendicularly to the p-n junction, whereas photons travel in the plane of the junction. Area A Input photons The injected-carrier concentration is therefore directly proportional to the injected current density so that the results shown in Figs. 172-3 and 172-4 with n as a parameter may just as well have J as a parameter. In particular, it follows from (17.2- 7) and (17.2-8) that within the linear approximation implicit in (17.2-7), the peak gain coefficient is linearly related to the injected current density J, i.e., It t212 (7.1-31) This expression is similar to (2.5-16) for the intensity of an infinite number of waves with equal phase differences, and with amplitudes that decrease at a geometric rate, as described in Sec2.5B. Assuming that arg(nr2} = 0, this expression can be written in the form (7.1-32) 1+(23/T sin where tit22 (1 ITl2 (12) (7.1-33) max = (1-1T1 r2D2 T1T2 and 1 IriT2 (7.1-34) Finesse

Explanation / Answer

check out this website from wiki.

https://en.wikipedia.org/wiki/Fabry–Pérot_interferometer

http://www.iop.vast.ac.vn/activities/5-8April/Proceedings_IWPA2004/Bai_53.%20VU_DOAN_MIEN_55NM_INGAASP.pdf

http://physics.unm.edu/JCDiels/classes/phys464/cl/lecture18.pdf

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