Homework #12

 Introduction to Lasers

1. What does LASER stand for?

2. Define each of the following terms:

a. metastable state

b. population inversion

c. spontaneous emission

d. stimulated emission

3. What are the four characteristics of laser light?

4. State the required elements of a laser.

5. For each of the following laser types listed, give the most common operating wavelength(s) and one use of the laser. If you need more information, try the "laser adventure", http://www.phys.ksu.edu/perg/vqm/laserweb/Preface/Toc.htm

a. CO2

b. Excimer

c. Nd:YAG

d. semiconductor