Page 483 - High Power Laser Handbook

450 Fi b er L a s er s Intr oduction to Optical Fiber Lasers 451

Pump core
MM pump Doped core
diodes
Pump core cladding
(a)

Pump
(b)

Figure 15.30 (a) End-pump scheme and (b) side-pumping scheme.

laser has yet been demonstrated with this scheme. Most commercial
high-power lasers use fiber-based combiners, which enable multiple
pump injections (see Fig. 15.31).
Power Scaling of Continuous Wave Fiber Lasers
A typical design of a CW fiber laser is shown in Fig. 15.32. The high
reflector (HR) and output coupler (OC) are implemented with FBGs.
For most high-power CW fiber lasers, optical nonlinear effects are not

Pump port

Signal port

Pump port
(a)

Pump port

Signal port

Pump port
(b)

Figure 15.31 (a) Pump combiner with six pump ports and a signal port, and
(b) GT-wave made by Southampton Photonics with two pump ports and a
signal port.