Fiber laser

G.ARJUN RAO M.SC(TECH) NIT WARANGAL

Overview

Introduction Basic components of fiber laser Advantages over conventional ssl laser Challenges of making fiber laser Conclusion References

introduction

Maiman demonstrated the ruby laser in the year 16th may 1960

Snitzer built the first fiber laser in the year 1961.

Introduction :

Double clad-Fiber laser

Fiber laser

Optical fiber laser

High power laser diodes

semiconductor laser

Principle :

laser T.I.R

Fiber

laser

Structure of fiber laser :

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.

components in fiber laser:

Fiber bragg gratting:

List of dopant elements:Ion Common host glasses Important emission

wavelengths

neodymium(Nd3+) silicate and phosphate glasses

1.03–1.1 μm, 0.9–0.95 μm, 1.32–1.35 μm

ytterbium(Yb3+) silicate glass 1.0–1.1 μmerbium (Er3+) silicate and phosphate

glasses, fluoride glasses1.5–1.6 μm, 2.7 μm, 0.55 μm

thulium (Tm3+) silicate and germanate glasses, fluoride glasses

1.7–2.1 μm, 1.45–1.53 μm, 0.48 μm, 0.8 μm

praseodymium (Pr3+)

silicate and fluoride glasses

1.3 μm, 0.635 μm, 0.6 μm, 0.52 μm, 0.49 μm

holmium (Ho3+) silicate glasses, fluorozirconate glasses

2.1 μm, 2.9 μm

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.

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.

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.

References :

www.Wikipedia.com www.bulletin.pan.pl www.rp-photonics.com

thank you!!