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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 3, Iss. 1 — Jan. 29, 2008

Towards the short-wavelength limit lasing at 1450 nm over 4I13/24I15/2 transition in silica-based erbium-doped fiber

Nan-Kuang Chen, Chi-Ming Hung, Sien Chi, and Yinchieh Lai  »View Author Affiliations


Optics Express, Vol. 15, Issue 25, pp. 16448-16456 (2007)
http://dx.doi.org/10.1364/OE.15.016448


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Abstract

The transition rate of the stimulated emission at the higher energy levels of the excited states in a silica-based erbium-doped fiber can be enhanced by introducing fundamental-mode cutoff filtering mechanism. The electrons excited by optical pumping can more occupy the higher energy levels of the excited states when the transition rate for the lower energy levels (longer wavelengths) of the excited states is substantially suppressed. The achieved lasing wavelength can thus be moving toward the shorter wavelengths of the gain bandwidth. The laser transition between 4I13/24I15/2 multiplets of the silica-based erbium-doped fiber is known to emit fluorescence with the shortest wavelength around 1450 nm. We, for the first time, experimentally demonstrate a widely tunable fiber laser at the wavelength very close to 1450 nm by using a standard silica-based C-band erbium-doped fiber. The tuning range covers 1451.9–1548.1 nm, with the best temperature tuning efficiency as high as 57.3 nm/°C, by discretely introducing tunable fundamental-mode cutoff tapered fiber filters along a 16-m-long erbium-doped fiber under a 980 nm pump power around 200 mW. The signal-ASE-ratio can be higher than 45 dB whereas the FWHM of the laser lasing lights can be reduced below 0.2 nm by using an additional Fabry-Perot filter.

© 2007 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.2410) Fiber optics and optical communications : Fibers, erbium
(140.3510) Lasers and laser optics : Lasers, fiber
(170.1870) Medical optics and biotechnology : Dermatology

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: August 15, 2007
Revised Manuscript: November 21, 2007
Manuscript Accepted: November 21, 2007
Published: November 27, 2007

Virtual Issues
Vol. 3, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Nan-Kuang Chen, Chi-Ming Hung, Sien Chi, and Yinchieh Lai, "Towards the short-wavelength limit lasing at 1450 nm over 4I13/2 → 4I15/2 transition in silica-based erbium-doped fiber," Opt. Express 15, 16448-16456 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-15-25-16448


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