Signal amplification and control in optical cavities with off-axis feedback

Details Signal amplification and control in optical cavities with off-axis feedback Signal amplification and control in optical cavities with off-axis feedback

2007-05-21

arxiv.org/abs/0705.3008v1

Physics

Optics

4 pages, 4 pictures

Scientific paper

10.1103/PhysRevLett.99.063907

We consider a large class of optical cavities and gain media with an off-axis external feedback which introduces a two-point nonlocality. This nonlocality moves the lasing threshold and opens large windows of control parameters where weak light spots can be strongly amplified while the background radiation remains very low. Furthermore, transverse phase and group velocities of a signal can be independently tuned and this enables to steer it non mechanically, to control its spatial chirping and to split it into two counter-propagating ones.

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