Actively Q-switched ytterbium tapered fiber laser

Valery Filippov; Juho Kerttula; Yuri Chamorovskii; Konstantin Golant; Oleg G. Okhotnikov

doi:10.1117/12.871937

10 February 2011 Actively Q-switched ytterbium tapered fiber laser

Valery Filippov, Juho Kerttula, Yuri Chamorovskii, Konstantin Golant, Oleg G. Okhotnikov

Proceedings Volume 7914, Fiber Lasers VIII: Technology, Systems, and Applications; 79141Y (2011) https://doi.org/10.1117/12.871937
Event: SPIE LASE, 2011, San Francisco, California, United States

Abstract

In this work, we have constructed an actively Q-switched T-DCF laser with an acousto-optic modulator (AOM). Actively Q-switched laser with T-DCF generated stable emission at 1065 nm over a wide repetition rate range of 0 Hz - 150 kHz, with the highest measured pulse energy of 1.6mJ limited by stimulated Brillouin scattering (SBS). We attribute the robust operation at low duty cycles to the intrinsically low amplified spontaneous emission (ASE), provided by the tapered fiber shape. In addition to the advantage of the large mode area at the output end of the fiber, the T-DCF provides several other attractive features. First, the vignetting of co-propagating ASE results in ASE power loss in wide-to-narrow end propagation. Second, the low-mode nature of counter-propagating spontaneous emission, arising from mode selection in the narrow part of the fiber, leads to weaker amplification of the spontaneous emission. These two effects contribute to the low ASE background. Finally, fiber diameter modulation is a known method for SBS suppression, and another inherent property of the T-DCF. These characteristics allowed for generation of 1.6mJ, 64 ns pulses at very low duty cycles, up to single shot operation, illustrating the potential of the T-DCF for high-energy pulse generation and amplification.

Citation Download Citation

Valery Filippov, Juho Kerttula, Yuri Chamorovskii, Konstantin Golant, and Oleg G. Okhotnikov "Actively Q-switched ytterbium tapered fiber laser", Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79141Y (10 February 2011); https://doi.org/10.1117/12.871937

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