Title

200W, 350Fs Fiber Cpa System Enabled By Chirped-Volume-Bragg-Gratings And Chirally-Coupled-Core Fiber Technology

Keywords

CPA; Fiber; Laser; Ultrafast; Volume Bragg grating

Abstract

Fiber-CPA-laser-systems are an extremely promising technology for generating ultrashort (fs-scale) pulses at high average-powers (hundreds-of-Watts to kW) while still producing diffraction-limited beams and being compact and robust compared to bulk-solid-state systems. Two obstacles still must be overcome to realize this potential, however. First, there is a need for stretchers and compressors that can yield long stretched pulse-durations (hundreds-of-ps to nanoseconds) and can handle high-energies and average-powers, yet are still simple and compact, so as to not offset the benefits of fibers. Secondly, large-core-fibers are needed for amplifiers and other components that are robustly singlemode. In this work, we present an Yb-fiber-CPA-system based on two novel technologies to overcome the aforementioned problems. Chirped-volume-Bragg-gratings (CVBGs), slabs of photo-thermo-refractive glass of cmscale with a quasi-periodic longitudinal index-of-refraction, are used for the stretcher and compressor. Their compactness and simplicity makes them compatible with fiber-laser benefits, and have excellent power handling capabilities are. Chirally-coupled-core (CCC) fibers, which have large core diameters (35μm here), yet are robustly single mode and can be coiled and spliced, are used for the power-amplifiers. Using these technologies, a system producing a record 200W of power (130W compressed) with 350fs pulse durations is demonstrated, and the potential kW-level-scaling is explored. © 2010 Copyright SPIE - The International Society for Optical Engineering.

Publication Date

5-10-2010

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

7580

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.845797

Socpus ID

77951810676 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77951810676

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