The length of a GaAs laser is 680 um, the thickness of the active region is 1 um and the width of the current-limiting s

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The length of a GaAs laser is 680 um, the thickness of the active region is 1 um and the width of the current-limiting s

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The Length Of A Gaas Laser Is 680 Um The Thickness Of The Active Region Is 1 Um And The Width Of The Current Limiting S 1
The Length Of A Gaas Laser Is 680 Um The Thickness Of The Active Region Is 1 Um And The Width Of The Current Limiting S 1 (94.49 KiB) Viewed 53 times
The length of a GaAs laser is 680 um, the thickness of the active region is 1 um and the width of the current-limiting stripe is 50 um. The refractive index of GaAs is 3.6, recombination time is 1 ns and the attenuation of the laser cavity is 10 cm!. Assume that the emission spectrum of GaAs is triangle-shaped with a peak energy of 1.476 eV and the width of the amplification band is 43 meV. Compute a) the wavelength of the peak energy emission, b) the FWHM of the amplification band in [Hz], c) amplification at laser threshold, and d) the minimum value for the electrical power fed in the laser when the population inversion (injected carrier concentration) in the active region is 1016 cm?
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