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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 29 — Oct. 10, 2011
  • pp: 5714–5720

Effect of beam waists on performance of the tunable fiber laser based on in-line two-taper Mach–Zehnder interferometer filter

Guolu Yin, Xiaozhen Wang, and Xiaoyi Bao  »View Author Affiliations


Applied Optics, Vol. 50, Issue 29, pp. 5714-5720 (2011)
http://dx.doi.org/10.1364/AO.50.005714


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Abstract

A tunable fiber ring laser based on an in-line two-taper Mach–Zehnder interferometer (MZI) filter was realized, and the effect of beam waists of the tapers on performance of the laser was investigated with different beam waists of 70 μm , 49 μm , and 33 μm . Experimental results show that the tunable laser with MZI length of 1 m and beam waist of 49 μm can cover 16.1 nm with tuning steps of 0.07 0.5 nm , a bandwidth of 10 pm , and a side mode suppression ratio (SMSR) of 40 50 dB . Tuning range is not only determined by the number of the cladding modes but is also affected by the filter loss. Tuning step is determined by the differences of the effective refractive indexes between the cladding modes and the core mode. SMSR is determined by the balance between the extinction ratio of the filter and the cavity loss of the laser due to MZI filter.

© 2011 Optical Society of America

OCIS Codes
(140.3500) Lasers and laser optics : Lasers, erbium
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3600) Lasers and laser optics : Lasers, tunable
(230.0230) Optical devices : Optical devices

ToC Category:
Optical Devices

History
Original Manuscript: May 16, 2011
Revised Manuscript: August 4, 2011
Manuscript Accepted: August 25, 2011
Published: October 6, 2011

Citation
Guolu Yin, Xiaozhen Wang, and Xiaoyi Bao, "Effect of beam waists on performance of the tunable fiber laser based on in-line two-taper Mach–Zehnder interferometer filter," Appl. Opt. 50, 5714-5720 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-29-5714


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