title: Triple-wavelength switchable Erbium doped fiber laser with cascaded asymmetric exposure long-period fiber gratings.
abstract: The cascaded asymmetric exposure long-period fiber gratings are fabricated by CO(2) laser, which provide multi-wavelength filters with anisotropic transmission spectrum under different states of polarization. Inserting this device in the ring cavity of an erbium-doped fiber laser, a triple-wavelength switchable lasing laser with equal spacing of 2.6 nm has been obtained. Owing to the polarization dependent loss of the new cascaded long-period fiber grating, the wavelength switching of random combination of C(1) (3), C (2) (3), and C(3) (3) is demonstrated through the polarization controlling. We derive the wavelength switch to the polarization characteristic of cascaded asymmetric exposure long-period fiber gratings.
authors.forename: Ming
authors.initials: M
authors.lastname: Yan
authors.forename: Shouyu
authors.initials: S
authors.lastname: Luo
authors.forename: Li
authors.initials: L
authors.lastname: Zhan
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Zhang
authors.forename: Yuxing
authors.initials: Y
authors.lastname: Xia