| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 463398 | Optical Fiber Technology | 2013 | 5 Pages |
•A model taking both the absorbing and coupling coefficients into account was established.•The propagation and absorption characteristics of pump light have been investigated in detail.•The coupling process can reduce the pump light absorbing effect and distribute the thermal load.•It needs bigger absorption coefficient and smaller coupling coefficient ratio k2/k1.•It shows that DSCCP fiber can play an important role in the field of high-power fiber lasers.
The propagation and absorption characteristics of pump light in the side-coupled cladding-pumped active fiber were investigated. A model taking both the absorbing and coupling coefficients into account was established. It is revealed that the absorbing effect of the active fiber enhance the pump-light coupling from the passive fiber to the active fiber, while the coupling effect reduce the absorbing process compared to the common double-cladding fiber. The study also considers the effect of the coupling coefficient ratio. It is found that higher effective absorption coefficient requires bigger absorption coefficient and smaller coupling coefficient ratio.
