Semiconductor Diode Laser Experiment Quiz

1. When the current reach near to threshold value GaAs lasers efficiency reaches to 40%.  When cooled to 20 K, its out power reaches to 2 watts. This is the most continuous laser in all lasers. One of the characteristics of semiconductor LASER is also..

2. A source is coherent it means;

3. Which was the first laser to measure the distance between Earth and the Moon?

4. The energy of the photon emitted in semiconductor diode is equal to the

5. The formula you used to determine the value of angular divergence, is a,

6. Which material is used here to construct the diode laser?

7. When exciting current are small a small part of carriers undergo recombination. In this process emission will be;

8. If angular divergence is 0.3 at a 300-meter distance. What will be it at 3 km?

9. Active region is

10. Will angular divergence vary with distance?

11. Semiconductor LASER differ from solid, gas and liquid lasers in many ways, some are listed here,

12. In a highly doped p-n junction diode laser (without biasing), the height of the p-type semiconductor’s conduction band position will be;