A single frequency narrow linewidth fiber laser based on quasi‐π‐phase‐shifted grating. Issue 3 (5th February 2018)

• Record Type: Journal Article
• Authors: She, L. J.; Zhang, D. T.; Wang, X. L.; Chen, D. R.
• Is Part Of: Microwave and optical technology letters. Volume 60:Issue 3(2018:Mar.)
• Page Start: 642
• Page End: 645
• Publication Date: 2018-02-05
• Subjects: fiber Bragg grating -- fiber laser -- quasi‐π‐phase‐shifted grating -- single frequency; Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.31032
• Languages: English
• ISSNs: 0895-2477

Abstract

Abstract: We propose and demonstrate a single frequency narrow linewidth fiber laser composed of the quasi‐π‐phase‐shifted grating (QπPSG) with a short line cavity and a structure of distributed feedback. On the high‐precision displacement platform, quasi‐π phase shift is introduced between two uniform fiber Bragg gratings based on a high‐concentration Erbium‐doped fiber (EDF) by ultraviolet exposure. Coupling the 980 nm pumped light to the QπPSG, the obtained laser is further amplified using a section of low‐concentration EDF. The single frequency lasing is achieved with a central wavelength of 1550.5 nm, and a slope efficiency of about 5.7%.