Homework 4 for Laser Spectroscopy
1. List and explain the elements of a LASER system that allow it light output to be
a. polarized
b. collimated
c. single wavelength
d. polarized
e. powerful
2. Explain how a dye laser works and is able to provide essentially continuous tunability
over a certain wavelength range while an Ar ion laser can only provide 5 or 6
wavelengths of light output.
3. The average energy of a Nd:YAG output pulsing at 10 Hz was measured to be 1
Joule/cm2 . If the pulsewidth of the laser is 6ns, what is the power per pulse of the laser?
4. Prof. Strommen has both a Kr ion and Ar ion laser in his lab. He showed you the
principal lines of these lasers, the green line of the Ar ion laser and the red line of the Kr
ion laser.
a. At what wavelength (in nm) would the 459 cm- 1 peak show up in the Stokes spectrum
using the Green line of the Ar ion laser?
b. At what wavelength (in nm) woiuld the 459 cm- 1 peak show up in the Anti-Stokes
spectrum using the Red line of the Kr-ion laser?
5. The Ruby laser could be frequency doubled using a nonlinear crystal. At what
wavelength would the doubled output appear?
6. Describe the differences between the Fabry-Perot type resonator and the ring resonator.
What is the advantage of the ring resonator.
7. In general, what states are involved in the production of laser light in a diode laser?
What types of states are involved in an Ar ion laser?