Modal instability of rod fiber amplifiers: a semi-analytic approach

Mette Marie Jørgensen; Kristian Rymann Hansen; Marko Laurila; Thomas Tanggaard Alkeskjold; Jesper Lægsgaard

doi:10.1117/12.2001412

26 February 2013 Modal instability of rod fiber amplifiers: a semi-analytic approach

Mette Marie Jørgensen, Kristian Rymann Hansen, Marko Laurila, Thomas Tanggaard Alkeskjold, Jesper Lægsgaard

Proceedings Volume 8601, Fiber Lasers X: Technology, Systems, and Applications; 860123 (2013) https://doi.org/10.1117/12.2001412
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

The modal instability (MI) threshold is estimated for four rod fiber designs by combining a semi-analytic model with the finite element method. The thermal load due to the quantum defect is calculated and used to numerically determine the mode distributions on which the expression for the onset of MIs is highly dependent. The relative intensity noise of the seed laser in an amplifier setup is used to seed the mode coupling between the fundamental and higher order mode, and lead to MI threshold values of 174 W – 348 W of extracted output power for the four rod fibers having core diameters in the range 53 μm – 95 μm.

Citation Download Citation

Mette Marie Jørgensen, Kristian Rymann Hansen, Marko Laurila, Thomas Tanggaard Alkeskjold, and Jesper Lægsgaard "Modal instability of rod fiber amplifiers: a semi-analytic approach", Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 860123 (26 February 2013); https://doi.org/10.1117/12.2001412

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