7. Double cladding fiber laser :
For communication we normally use single clad optical fiber.
Initially for lasers also single clad fibers are used.
But the losses in the single clad fiber is more.
With the help of double cladding fiber we can pump the gain medium
effectively.
Laser will oscillates in the core of the fiber.
11. Advantages over ssl nd:YAG :
High Power: ease of cooling in long fiber.
High Stability: spliced wave guiding fibers.
High Reliability: operate 24/7 for decades.
Lower total cost of ownership.
Low jitter and low amplitude noise.
No free space cavity alignment.
Turn-key operation.
Immune to tough environmental changes.
12. Challenges in fiber laser develepmant:
Design and Fabrication fiber.
New host materials for new wavelengths.
New dopant materials for new emission wavelengths.
Non linear materials for efficient frequency conversion.
Component design and fabrication.
13. Conclusions :
The fiber lasers (both cw and pulse) are now the modern laser systems
allowing for implementation of laser sources in most tasks, in medicine,
industry and metrology. The optical and generated energy parameters are
characterized by a very high efficiency and the optical quality of laser beam
which create these sources as a leading group of high power laser systems in
the very beginning of 21 century.