Ultrashort Laser Pulse Phenomena, 2nd Edition

380 Ultrashort Sources II: Examples

(100 MHz, 100 ps, 1.32 µm) are coupled through a beam splitter BS into a

ring laser containing an optical fiber. The fiber was tailored to have a negative

dispersion for λ



> 1. 46 µm. While traveling through the fiber the pump pulses

at 1.319 µm produce Stokes pulses at λ

1

= 1. 41 µm. This first Stokes pulse in

turn can act as pump source for the generation of a second Stokes pulse (λ

2

=

1. 495 µm), which is in the dispersion region that enables soliton formation. Of

course, for efficient synchronous pumping, the length of the ring laser had to

be matched to the repetition rate of the pump. Second Stokes pulses as short as

200 fs were obtained.

6.9.3. Doped Fiber Lasers

Fibers can be doped with any of the rare earth ions ...