Wavelength spacing tunable multiwavelength fiber laser with lasing wavelength selectivity

We experimentally demonstrate a wavelength spacing tunable multiwavelength fiber laser with lasing wavelength controllability based on a hybrid gain medium. The wavelength spacing can be readily controlled by the effective length of PMF segments in an intracavity PMF Lyot-Sagnac filter. The lasing wavelength can be also controlled in a range from 1510 to 1560 nm by the effect of non-linear gain compression effect of a semiconductor optical amplifier incorporated with a C-band erbium doped fiber amplifier. The interleaved optical switching performance based on the proposed multiwavelength fiber laser was achieved depending on the relative phase difference between the two orthogonal modes. (c) 2005 Elsevier B.V. All rights reserved.