Understanding the Effects of Laser Interaction with Ions in Doped Fibers

AI Thread Summary
The discussion centers on the behavior of laser light interacting with ions in doped fibers, specifically whether the laser will spread out in the direction of polarization due to momentum distribution. Participants question if the total momentum being zero allows the wave to continue straight or if it will diverge. The role of the radially graduated index of refraction in fibers, which typically promotes self-focusing along the central axis, is also highlighted. The interaction dynamics of the laser with the doped ions and the fiber's design are crucial to understanding the resulting propagation behavior. The conversation emphasizes the complexities of laser physics in fiber optics.
God Plays Dice
Messages
79
Reaction score
0
Will a laser exposed to ions (doped fibre) spread out in the direction of polarisation as momentum sends the peaks in one direction and the troughs in another. Or, as total momentum is 0 does the wave continue on straight.
 
Science news on Phys.org
Continue on straight? In a fibre? They normally are made with a radially graduated index of refraction to self-focus along the central axis, aren't they?
 
Thread 'A quartet of epi-illumination methods'

Thread 'A quartet of epi-illumination methods'

Well, it took almost 20 years (!!!), but I finally obtained a set of epi-phase microscope objectives (Zeiss). The principles of epi-phase contrast is nearly identical to transillumination phase contrast, but the phase ring is a 1/8 wave retarder rather than a 1/4 wave retarder (because with epi-illumination, the light passes through the ring twice). This method was popular only for a very short period of time before epi-DIC (differential interference contrast) became widely available. So...
View full post »

Thread 'Effective absorption coefficient of gold nanoparticles'

I am currently undertaking a research internship where I am modelling the heating of silicon wafers with a 515 nm femtosecond laser. In order to increase the absorption of the laser into the oxide layer on top of the wafer it was suggested we use gold nanoparticles. I was tasked with modelling the optical properties of a 5nm gold nanoparticle, in particular the absorption cross section, using COMSOL Multiphysics. My model seems to be getting correct values for the absorption coefficient and...
View full post »

Similar threads

Light Reflection: Understand How Light Interacts with Materials
Replies
26
Views
5K
A Interference pattern for a laser beam through an AOM
Replies
4
Views
4K
Longitudinal/transverse modes in optical cavity (resonator)
Replies
2
Views
3K
Questions about the common-ion effect
Replies
4
Views
2K
B Multimode optical fiber, physics beginner help :D
Replies
37
Views
4K
Sending Laser Light out of fiber optic in all directions
Replies
2
Views
3K
Conservation of momentum and laser powered solar sail
Replies
35
Views
8K
Dark fiber optic cables as Earthquake detectors
Replies
9
Views
2K
I How does detuned laser frequency affect atomic dipole forces?
Replies
10
Views
2K
How does the Zeeman Effect contribute to laser cooling of atoms?
Replies
4
Views
4K

Hot Threads

Recent Insights

Back
Top