Laser Intro

Question 1

What happens in the ranges of laser wavelength sections?

Answer 1

UV - Photo chemical processing
Visible - Either
Infrared - Photo thermal processing

Question 2

What types of lasers are at infra-red, visible and UV?

Answer 2

Infrared - CO2, Nd:YAG, Diode, Fibre
Visible - Copper Vapour, 2Nd:YAG
UV - Excimer, 3Nd:YAG

Question 3

What is the wavelength of a CO2 laser?

Answer 3

10.6um

Question 4

What is the wavelength of a Nd:YAG laser?

Answer 4

1.06um

Question 5

What is the wavelength of a Fibre laser?

Answer 5

1.06um

Question 6

What is the most expensive type of laser of the 3 studied?

Answer 6

Nd: YAG (highest capital), CO2 (highest running cost), Fibre

Question 7

What are the pros and cons of using ceramics as a material?

Answer 7

Pros: less dense, high temp. tolerant, ideal for engine components

Cons: brittle, difficult to machine traditionally, lasers can drill holes <0.1mm dia. though