Detection Methods: Heterodyne, Differential, Normal & Homodyne

[watertreader]

Hi,

Just a query...

what is the differences between this types of detection and their usage?
a) heterodyne
b) differential
c) normal
d) homodyne?

 

[waht]

We don't do homework assignments.

 

[vk6kro]

Just go to Wikipedia or Google and look them up.

eg
http://en.wikipedia.org/wiki/Homodyne

Even your textbook from school will have nice diagrams and a carefully written explanation.

 

[watertreader]

not a homework assignment...

actually i am more concerned with the timing detection requirement of differential detection... for a heterodyne detection, we need to capture 2 cycle of change to determine the heterodyne signal..what about differential?

also for homodyne and heterodyne detection... heard there is a difference in the terminology between optical and electrical homodyne/heterodyne..what/why the diff?