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

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

4. A source is coherent it means;

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

6. Active region is

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

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

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

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

11. Will angular divergence vary with distance?

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