Single-Longitudinal-Mode Erbium-Doped Fiber Ring Laser Based on High Finesse Fiber Bragg Grating Fabry-PÉrot Etalon

• Published in: IEEE photonics technology letters Vol. 20; no. 12; pp. 976 - 978
• Main Authors: Cheng, X.P., Shum, P., Tse, C.H., Zhou, J.L., Tang, M., Tan, W.C., Wu, R.F., Zhang, J.
• Format: Journal Article
• Language: English
• Published: New York IEEE 15.06.2008; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Band pass filters; Bandwidth; Bragg gratings; Erbium-doped fiber; Erbium-doped fiber lasers; Fabry-Perot; Fabry-PÉrot (FP) resonators; fiber Bragg gratings (FBGs); Fiber gratings; fiber lasers; Laser modes; Laser stability; Laser tuning; Ring lasers
• ISSN: 1041-1135; 1941-0174
• DOI: 10.1109/LPT.2008.922974

We present a simple and stable single-longitudinal-mode (SLM) erbium-doped fiber laser. It consists of an apodized fiber Bragg grating (FBG) and a high finesse FBG-based Fabry-Perot (FP) etalon in the ring cavity. The apodized FBG acts as a wavelength discriminative component selecting a few oscillation modes while the FP etalon serves as narrow bandwidth bandpass filter to further discriminate and select SLM efficiently. Stable SLM laser output at 1.55 m with linewidth about 2.5 kHz is acquired. Furthermore, continuous wavelength tuning over 8 nm is achieved by simultaneously applying strain to the FBG and the FP etalon.