This preview shows page 1. Sign up to view the full content.
Unformatted text preview: 4 For a GaAs laser diode the laser emission area is 1 micron thick by 50 microns wide. Calculate the divergence angle in the vertical an horizontal direction. What is the Rayleigh range for each direction, (8 marks) 5 Assume a single layer antireflection coating is to be deposited on long IR ZnSe lens (n=2.4) for a wavelength of a CO 2 laser (10.4 microns). (a) What is the minimum thickness for this coating (3 marks) (b) What is the next smallest thickness that will give an AR coating. (2 marks)...
View Full Document
This note was uploaded on 11/22/2010 for the course ENSC 470 taught by Professor Chapmann during the Spring '10 term at Simon Fraser.
- Spring '10