Thermally resilient depressed-index core fully-aperiodic-large-pitch fiber for high average power operation (Conference Presentation)

Baptiste Leconte; Marie-Alicia Malleville; Romain Dauliat; Remi Du Jeu; Raphaël Jamier; Anka Schwuchow; Kay Schuster; Florent Mazeas; Laurent Labonté; Sébastien Tanzilli; Philippe Roy

doi:10.1117/12.2507552

13 March 2019 Thermally resilient depressed-index core fully-aperiodic-large-pitch fiber for high average power operation (Conference Presentation)

Baptiste Leconte, Marie-Alicia Malleville, Romain Dauliat, Remi Du Jeu, Raphaël Jamier, Anka Schwuchow, Kay Schuster, Florent Mazeas, Laurent Labonté, Sébastien Tanzilli, Philippe Roy

Author Affiliations +

Proceedings Volume 10897, Fiber Lasers XVI: Technology and Systems; 1089724 (2019) https://doi.org/10.1117/12.2507552
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

Since the proof of concept of Photonic Crystal Fibers (PCF) by Knight et al., their development over the last two decades has led to progressive enlargement of core sizes while maintaining a transverse single-mode operation enabling power scaling in fiber lasers and amplifiers by pushing further the nonlinear effects and damage thresholds. Numerous fiber designs and laser/amplifier architectures have been investigated in order to make the most of the PCF technology and mainly to mitigate a new deleterious phenomenon responsible of beam quality degradation, the Transverse Mode Instability (TMI), which arose in parallel of the high average powers reached with those fibers. In this context, our research group has developed a PCF, so called Fully-Aperiodic Large-Pitch Fibers (FA-LPF) which proved its relevance with passive as well as active fibers, manufactured with the powder sintering technology known as REPUSIL. In this work, the refractive index of the FA-LPF core is slightly lower than that of the background cladding material (Δn ~ -5x10-5). This depressed-index core feature enables a thermal resilience ensuring an effective single-mode propagation above a certain average power for core size as high as 110µm. Experimental results in amplifier set-up with a 110 µm Yb-doped depressed core FA-LPF led to 110W of amplified signal for 300W of pump with a M² < 1.3. No TMI phenomenon was observed even at maximum pump power despite the average power and the very large mode area involved.

Conference Presentation

Citation Download Citation

Baptiste Leconte, Marie-Alicia Malleville, Romain Dauliat, Remi Du Jeu, Raphaël Jamier, Anka Schwuchow, Kay Schuster, Florent Mazeas, Laurent Labonté, Sébastien Tanzilli, and Philippe Roy "Thermally resilient depressed-index core fully-aperiodic-large-pitch fiber for high average power operation (Conference Presentation)", Proc. SPIE 10897, Fiber Lasers XVI: Technology and Systems, 1089724 (13 March 2019); https://doi.org/10.1117/12.2507552

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available