Title

Lasing In Thulium Doped Polarizing Photonic Crystal Fibers (Pcf)

Keywords

Fiber Lasers; High Power; Multiplexed Volume Bragg Gratings; Spectral Beam Combining; Volume Bragg Gratings

Abstract

The recent development of kW fiber laser sources makes the concept of laser systems operating at power levels from tens of kilowatts up to 100-kilowatt levels a reality. The use of volume Bragg gratings for spectral beam combining is one approach to achieve that goal. To make such systems compact, lower the complexity and minimize the induced thermal distortions we propose and demonstrate the use of special volume Bragg elements which have several Bragg gratings written inside as combining optical components. The multiplexed volume Bragg gratings (MVBGs) were recorded in photo-thermo refractive glass and three beams with total power of 420 W were successfully combined using one MVBG. The combining efficiency was 97% and there was no significant beam quality degradation. The results demonstrated that the approach of using multiplexed volume Bragg gratings for spectral beam combining is an excellent extension to the current state of the art combining techniques. Especially valuable is the capability to reduce the number of optical elements in the system and while being able to manage the expected thermal load when kilowatt level sources are used for beam combining. © 2012 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Publication Date

4-17-2012

Publication Title

Progress in Biomedical Optics and Imaging - Proceedings of SPIE

Volume

8237

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.909440

Socpus ID

84859635445 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84859635445

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