All-fiber higher-order-mode module with anomalous dispersion below 800 nm

Kim G. Jespersen; Martin Garmund; Dan Jakobsen; Lars Grüner-Nielsen; Bera Palsdottir

doi:10.1117/12.842017

17 February 2010 All-fiber higher-order-mode module with anomalous dispersion below 800 nm

Kim G. Jespersen, Martin Garmund, Dan Jakobsen, Lars Grüner-Nielsen, Bera Palsdottir

Proceedings Volume 7580, Fiber Lasers VII: Technology, Systems, and Applications; 75802G (2010) https://doi.org/10.1117/12.842017
Event: SPIE LASE, 2010, San Francisco, California, United States

Abstract

We present an all-silica fiber-based module with anomalous dispersion below 800nm. The fiber module is based on propagation in a higher-order-mode (HOM), and mode conversion is achieved using UV inscribed broadband longperiod gratings. The large normal material dispersion in silica in the near infrared is compensated by anomalous waveguide dispersion of the HOM resulting in a total HOM dispersion of +112.7ps/(nm•km) (β₂ = -0.0355ps²/m) at 770nm. The dispersion has been calculated from the preform index profile and measured with a white light interferometer. The operation bandwidth is ~20nm with an insertion loss of ~1.5dB. The multipath interference noise is less than -27dB in the operation bandwidth. Nearly linear pulse propagation can be obtained for pulse energies up to 65pJ at 75fs pulse duration. This power regime is interesting for e.g. medical two-photon fluorescence imaging. The proposed anomalous dispersion module is demonstrated in a 3.6m long femtosecond fiber delivery application to deliver 110fs pulses directly from the output of a Ti:Sapphire femtosecond laser without the need for pre-chirping.

Citation Download Citation

Kim G. Jespersen, Martin Garmund, Dan Jakobsen, Lars Grüner-Nielsen, and Bera Palsdottir "All-fiber higher-order-mode module with anomalous dispersion below 800 nm", Proc. SPIE 7580, Fiber Lasers VII: Technology, Systems, and Applications, 75802G (17 February 2010); https://doi.org/10.1117/12.842017

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