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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 11 — May. 30, 2005
  • pp: 3902–3912

S-band optical amplification by an internally generated pump in thulium ytterbium codoped fiber

Jun Chang, Qing-Pu Wang, Xingyu Zhang, Zhejin Liu, Zhaojun Liu, and Gang-Ding Peng  »View Author Affiliations

Optics Express, Vol. 13, Issue 11, pp. 3902-3912 (2005)

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We propose a novel scheme in which Yb3+ codoping and a laser cavity are introduced in Tm3+ doped fiber to achieve efficient S-band optical amplification with a 980 nm pump source. This scheme makes it possible for conventional 980 nm pump sources for Er3+ doped fiber amplifiers to be used for S-band Tm3+ doped fiber amplifiers (TDFAs). By introducing a laser cavity into an amplifier, an internally generated pump from Yb3+ at a desirable wavelength for pumping Tm3+ could be produced. We establish and analyze, for the first time to our knowledge, a new theoretical model that takes into consideration both the internal lasing operation inside the optical amplification process and the energy transfer between the Tm3+ and the Yb3+ ions in TDFAs. Various situations such as Tm3+ doping concentration and cavity reflectivity have been investigated. The results show that high optical gain and high pump efficiency can be achieved by use of 980 nm sources. With a laser cavity of 1050 nm in Tm3+ and Yb3+ codoped fiber, for example, it is possible to achieve high optical gain of greater than 20 dB, a noise figure of approximately 5 dB in the wavelength range from 1450 to 1480 nm with a 0.3 W power at 980 nm pump source.

© 2005 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.2330) Fiber optics and optical communications : Fiber optics communications

ToC Category:
Research Papers

Original Manuscript: April 15, 2005
Revised Manuscript: May 10, 2005
Published: May 30, 2005

Jun Chang, Qing-Pu Wang, Xingyu Zhang, Zhejin Liu, Zhaojun Liu, and Gang-Ding Peng, "S-band optical amplification by an internally generated pump in thulium ytterbium codoped fiber," Opt. Express 13, 3902-3912 (2005)

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