Semiconductor Diode Laser Experiment Quiz

1. A source is coherent it means;

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

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

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

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

6. Active region is

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

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

9. Will angular divergence vary with distance?

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

11. 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..

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