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Proceedings Paper

Single-mode tunable 980 nm double-clad ytterbium-doped MMI-based fiber laser
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Paper Abstract

We report for the first time, a single mode, tunable, double-clad ytterbium-fiber (YDF) laser emitting in a wavelength range between 976 and 985 nm that operates using the re-imaging effect that occurs in multimode interference (MMI) devices. The system consists of an YDF with bare fiber cleaved ends. The forward end of this fiber is fusion spliced to a piece of 3 m of Samarium-doped- single-mode fiber with absorption measured at 980 nm of 0.3 dB/m, and at 1030 nm of 6 dB/m. The other end of the Sm+3 doped single-mode fiber is spliced to a 16.2 mm long multimode fiber (MMF) in order to induce the MMI self-imaging effect. From simulations, we found that, at this particular length, for the MMF, the light exiting will exhibit a maximum transmission for the 980 nm wavelength, while keeping a minimum for the 1030 nm wavelength. Near to the MMF facet, at a distance between 0 and 100 µm, we place a dichroic mirror which also helps in the selection of the wavelength emission. We calculated that 10 dB gain generated at 980 nm is enough to build up a laser since the total round-trip cavity losses are estimated to be 8.8 dB, whereas for the unwanted 1030nm get more than 60dB insertion loss in this setup. At the end, there is more than 1 dB for the effective gain at the preferred wavelength emission range which is enough to promote lasing at around 980 nm.

Paper Details

Date Published: 25 August 2008
PDF: 7 pages
Proc. SPIE 7056, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications II, 70560K (25 August 2008); doi: 10.1117/12.795138
Show Author Affiliations
C. Calles-Arriaga, UANL (Mexico)
R. Selvas-Aguilar, UANL (Mexico)
A. Castillo-Guzman, UANL (Mexico)
D. A. May-Arrioja, INAOE (Mexico)
G. Anzueto-Sanchez, Univ. Politécnica de Chiapas (Mexico)

Published in SPIE Proceedings Vol. 7056:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications II
Shizhuo Yin; Ruyan Guo, Editor(s)

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