Abstract

π-phase-shifted distributed feedback, ultralong fiber Bragg gratings (FBGs) with Raman gain have been shown to be excellent ultranarrow single-frequency lasers that can be operated at any wavelength. However, these lasers have shown unusually low slope efficiency (1%–10%), while theoretical simulations predict a much higher (30%–60%) number. We believe this poor performance is due to a thermally induced phase shift inside the FBG due to absorption of the high intensity of the signal oscillating in the cavity. To compensate for this, a thermally controlled dynamic phase shift is proposed to increase efficiency after lasing first occurs. We show here an increase in the slope efficiency of a factor of 4 and an increase in the total output efficiency by a factor of 6.5 with 6 W of pump power by reducing the phase shift once the laser begins oscillating.

© 2018 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Realization and optimization of phase-shifted distributed feedback fiber Bragg grating Raman lasers

Sébastien Loranger, Amirhossein Tehranchi, Herbert Winful, and Raman Kashyap
Optica 5(3) 295-302 (2018)

High-power Tm-doped fiber distributed-feedback laser at 1943 nm

Z. Zhang, D. Y. Shen, A. J. Boyland, J. K. Sahu, W. A. Clarkson, and M. Ibsen
Opt. Lett. 33(18) 2059-2061 (2008)

Stimulated Brillouin scattering in ultra-long distributed feedback Bragg gratings in standard optical fiber

Sébastien Loranger, Victor Lambin-Iezzi, Mamoun Wahbeh, and Raman Kashyap
Opt. Lett. 41(8) 1797-1800 (2016)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription