2413 m this difference is about 04 nm 75 a long thin

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Unformatted text preview: = 6.15 × 10 − 22 ⎜1 + 5.661 d ⎟ A / cm 2 ⎜ Na ⎟ ⎝ ⎠ The plot is shown in the figure below. J S = eni2 1.1 1.05 V OC 1 0.95 0.9 0.85 15 10 10 16 10 17 10 18 -3 Density (cm ) 14.35 If the photon output of a laser diode is equal to the bandgap energy, find the wavelength separation between adjacent modes in a GaAs laser with L = 75 µm. Here, we use the results of Prob. 14.25 with c hc 6.625 × 10−34 ⋅ 3 × 10 8 λ= = = = 0.24 µm f εs E G εs 1.6 × 10−19 ⋅ 1.42 13.1 € and Δλ = λ2 (0.24 ) 2 = = 0.39 nm 2L 2 ⋅ 75 € We can check this, as the lowest mode has N = 625, which corresponds to λ = 0.2417 µm. The next mode would be N = 626, which corresponds to λ = 0.2413 µm. This difference is about 0.4 nm. 7.5 A long thin cylindrical rod of electronic material has an...
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