In this paper, a simple and effective tunable multi-wavelength ytterbium-doped fiber laser (MWYDFL) is proposed and demonstrated. A nonlinear polarization rotation (NPR) structure, including polarization controller (PC) and polarizationdependent isolator (PDI) is used as the wavelength selector and works to generate intensity-dependence transmission to suppress the mode competition and solves the problem of greater intensity of side modes. Thus the stable all-fiber ring cavity structure is realized. Through controlling and adjusting the polarization of the PC in the cavity, a multiwavelength and tunable single wavelength laser with good performance is achieved under the room temperature. The laser outputs of the single-wavelength can be tuned about 12 nm with an interval of about 1 nm from 1074.42 nm to 1090.97 nm. The side-mode suppression ratios (SMSRs) and the linewidths of these lasing lines are all over 50 dB and less than 0.02 nm. Single-wavelength, dual-wavelength, triple-wavelength and quadruple-wavelength can be switched by appropriately adjusting the PC. The power fluctuations and wavelength shifts are less than 2 dB and 0.02 nm in an hour at room temperature.
A simple and effective tunable and switchable L-band multi-wavelength polarization-maintaining erbium-doped fiber laser is proposed and demonstrated. A Mach-Zehnder interferometer with a fiber Bragg grating inside one arm used as the wavelength selective filter makes the output wavelength at the L band. The nonlinear polarization rotation effect induced by a 5-km long single mode fiber, a polarization controller (PC) and polarization-dependent isolator is used to effectively suppress the mode competition. Thus the stable all-fiber ring cavity structure with multi-function operation is realized. The laser outputs of the single-wavelength can be tuned about 12 nm with an interval of 1 nm in L band. The side-mode suppression ratios (SMSRs) of these lasing lines are all over 60 dB. And single-wavelength, dual-wavelength, triple-wavelength and quadruple-wavelength can be switched by appropriately adjusting the PC. The SMSRs of multiwavelength lasing lines are all over 50 dB. The laser has the advantages of simple all-fiber configuration, low cost, high stability and operating at room temperature.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.