New generation of cladding pumped fibre lasers and amplifiers

Pump-gain integrated functional laser fiber towards 10 kW-level high-power applications

“…Alternatively, a side-pumping scheme is highly competitive in the application of a high-power fiber amplifier owing to its undoubted advantages in terms of system design, ease of pump injection, signal extraction and power scalability [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Side-pumping combiners for a high-power fiber laser/ amplifier use can be broadly classified into the short-distance centralized side-pumping combiner (e.g.…”

“…fused taper side coupling (IPG) [6], the direct fusion side coupling [7,14]), and long-distance distributed side-pumping (LDDSP) combiner (e.g. co-linear pumping (GTWave fiber) [2,12,[15][16][17][18][19][20][21]) with regard to the pump coupling length. The GTWave fiber is a potentially strong competitor for the other side-pumping combiners, as it is capable of combining enough pump power integration due to its unlimited pump ports, laser signal amplification in the signal laser fiber, nonlinear effect suppression by using a bidirectional pump method and effective thermal load distribution through a long interaction zone [2,12,[15][16][17][18][19][20][21].…”

High-power wavelength-tunable cladding-pumped rare-earth-doped silica fiber lasers

“…Therefore, alternative schemes have been developed that free the ends of the DCF and enable pump injection through the fiber's side at multiple points. For example, one can launch pump light via a prism mounted on the side of the DCF [19], via a v-groove in the DCF [20], or via one or several fibers connected to the side of the rare-earth doped fiber [21][22][23]. The fibers can be fused together, and polished to provide appropriate interfaces.…”

Modeling and Optimization of Double-Clad Fiber Amplifiers Using Chaotic Propagation of the Pump

“…Performances have been improved first thanks to new pumping technologies: end pumping [1] has been progressively replaced by side pumping [2][3][4], making it possible to leave the DCF ends free for fiber splicing. Moreover, the use of large area emitting laser diodes makes it possible to launch very high pump power, typically from a few to several tens of watts [5,6]. High-level saturated signal output power can thus be reached, but with a very reduced efficiency.…”