Abstract

A Ho:YAG ceramic microchip laser pumped by a Tm fiber laser at 1910 nm is passively Q-switched by single- and multi-layer graphene, single-walled carbon nanotubes (SWCNTs), and Cr2+:ZnSe saturable absorbers (SAs). Employing SWCNTs, this laser generated an average power of 810 mW at 2090 nm with a slope efficiency of 68% and continuous wave to Q-switching conversion efficiency of 70%. The shortest pulse duration was 85 ns at a repetition rate of 165 kHz, and the pulse energy reached 4.9 μJ. The laser performance and pulse stability were superior compared to graphene SAs even for a different number of graphene layers (n=1 to 4). A model for the description of the Ho:YAG laser Q-switched by carbon nanostructures is presented. This modeling allowed us to estimate the saturation intensity for multi-layered graphene and SWCNT SAs to be 1.2±0.2 and 7±1  MW/cm2, respectively. When using Cr2+:ZnSe, the Ho:YAG microchip laser generated 11 ns/25 μJ pulses at a repetition rate of 14.8 kHz.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Semiconductor saturable absorber Q-switching of a holmium micro-laser

Ruijun Lan, Xavier Mateos, Yicheng Wang, Josep Maria Serres, Pavel Loiko, Jiang Li, Yubai Pan, Uwe Griebner, and Valentin Petrov
Opt. Express 25(5) 4579-4584 (2017)

Passive Q-switching of a Tm,Ho:KLu(WO4)2 microchip laser by a Cr:ZnS saturable absorber

J. M. Serres, P. Loiko, X. Mateos, V. Jambunathan, A. S. Yasukevich, K. V. Yumashev, V. Petrov, U. Griebner, M. Aguiló, and F. Díaz
Appl. Opt. 55(14) 3757-3763 (2016)

MoS2 saturable absorber for passive Q-switching of Yb and Tm microchip lasers

Josep Maria Serres, Pavel Loiko, Xavier Mateos, Haohai Yu, Huaijin Zhang, Yanxue Chen, Valentin Petrov, Uwe Griebner, Konstantin Yumashev, Magdalena Aguiló, and Francesc Díaz
Opt. Mater. Express 6(10) 3262-3273 (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 (13)

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

Tables (4)

You do not have subscription access to this journal. Article tables 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 (9)

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