What are the conditions for lasing

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Reference no: EM13946423

1. What does LASER stand for?

2. What are the conditions for lasing?

3. A GaAs laser diodes has a 5 nm gain linewidth and a cavity length of 0.5 mm. Sketch the output spectrum, including the emitted wavelengths and the number of longitudinal modes. Assume that n = 3.35, the central wavelength is = 0.8 m.

4. For a LED, compute the quantum efficiency if 3 mW of optical power are radiated with a drive current of 50 mA at 1.5 m.

5. Calculate the maximum allowed thickness of the active layer of single transversal mode operation of a 1.5 m semiconductor laser. Assume that n1 = 3.5 and n2 = 3.4

6. Compute the grating space for the first order diffraction for an InGaAsP distributed feedback (DFB) laser diode operating at 1.3 m. (Assuming that n = 3.51).

Reference no: EM13946423

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