CW laser beam equ needed asap

[hitman1988]

Hi all
i need the equation for CW laser . i need it asap please

 

[keith1200rs]

What sort of equation! Your question is very vague.

Keith

 

[hitman1988]

Hi
i have no experience in laser world , but all i'm trying to do is to modulate in fiber optics , and i know that the laser isn't an ordinary wave . please can you guide me in this ? i'm using laser as carrier wave.

Mohannad

 

[keith1200rs]

Have a look at your laser diode data sheet. The laser is basically like a diode but it can have a very high threshold current. Until you reach the threshold current you get almost no light out, then the light increases rapidly with a small current increase. There are quite a few chips around to control laser diodes which would be the easiest way, depending on the frequency.

Keith

 

[hitman1988]

Hi keith
i'm trying to describe the output of an optical modulator mathematically, but i don't know how to represent the laser wave .

 

[tony_lth]

hope you can find some infos from Chinese attached ppt file.

 

[FvM]

i know that the laser isn't an ordinary wave

i don't know how to represent the laser wave

Basically, a single mode laser would be represented exactly by a linear polarized sine wave. I guess, that's what you mean with "ordinary wave"?
Analyzing a laser wave more detailed, there are properties like coherence length respectively bandwidth.

 

[hitman1988]

Hi all
yes that is what i meant by "not ordinary function " , please how can i represent it ?

 

[FvM]

how can i represent it

Represent for which purpose. Why do you think, it's not sufficient to handle the laser wave as an ideal monochromatic source (simple CW)?

 

[hitman1988]

if that what you think is right , i have no idea about it and no one sure about its form .