Tunable dual-wavelength fiber laser

• Published in: Optical fiber technology Vol. 15; no. 4; pp. 377 - 379
• Main Authors: Moore, Peter J., Chaboyer, Zachary J., Das, Gautam
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01-08-2009
• Subjects: Dual-wavelength laser; Fiber Bragg grating; Fiber ring laser; Multiwavelength fiber laser; Polarization-maintaining erbium-doped fiber; Single-mode laser; Fiber ring laser; Dual-wavelength laser; Multiwavelength fiber laser; Single-mode laser; Fiber Bragg grating; Polarization-maintaining erbium-doped fiber
• ISSN: 1068-5200; 1095-9912
• DOI: 10.1016/j.yofte.2009.04.001

A narrow-linewidth, tunable, dual-wavelength fiber laser operating at room temperature with each lasing wavelength in single-longitudinal-mode operation is demonstrated. A commercially available tunable fiber Bragg grating was used to tune one of the lasing lines. An unpumped elliptical-core erbium-doped fiber was used as a saturable absorber to suppress mode hopping. Wavelength switching was achieved using a polarization controller. The linewidth (FWHM, full width at half maximum) of the laser line was 6.7
MHz and the OSNR (optical signal to noise ratio) was more than 40
dB.