Tunable medium power multiwavelength fiber laser

Abstract The authors report a medium power spacing tunable multiwavelength fiber laser operating at room temperature. A double‐clad erbium‐ytterbium co‐doped fiber was used to produce high output power. An unpumped polarization‐maintaining fiber and a Lyot‐Sagnac loop filter with multiple segments of polarization‐maintaining fibers were used as a saturable absorber to stabilize the laser wavelengths and tunable filter to tune the separation between lasing wavelengths, respectively. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2517–2519, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24648