Switchable and tunable dual-wavelength single-longitudinal-mode erbium-doped fiber laser with special subring-cavity and superimposed fiber Bragg gratings

A switchable and tunable dual-wavelength single-longitudinal-mode (SLM) erbium-doped fiber laser (EDFL) has been proposed and demonstrated. Two superimposed fiber Bragg gratings (SI-FBG) have been used as one original wavelength selection component. A special subring-cavity was employed to select the SLM. By properly adjusting a polarization controller, single- and dual-wavelength switchable operations with high wavelength and power stability were realized experimentally. Regardless of which work mode, the signal to noise ratio was higher than 60 dB and the polarization extinction ratio was higher than 20 dB. The wavelength-spacing was 9.96 nm, indicating that it can be used to generate continuous-wave terahertz waves. The linewidth of each lasing wavelength measured by the delayed self-heterodyne method was approximately 1.25 kHz and 1 kHz, respectively. By stretching the SI-FBG, the EDFL had a wavelength-tunable range of 5.96 nm in both the single- and dual-wavelength operations.

[1]  Luis Rodriguez-Cobo,et al.  Dual-Wavelength Single-Longitudinal Mode Fiber Laser Using Phase-Shift Bragg Gratings , 2014, IEEE Journal of Selected Topics in Quantum Electronics.

[2]  K. Kikuchi,et al.  Novel method for high resolution measurement of laser output spectrum , 1980 .

[3]  Tianshu Wang,et al.  Widely tunable wavelength spacing dual-wavelength single longitudinal mode erbium doped fiber laser , 2014 .

[5]  G. Stewart,et al.  Stable single-mode operation of a narrow-linewidth, linearly polarized, erbium-fiber ring laser using a saturable absorber , 2006, Journal of Lightwave Technology.

[6]  Qi Li,et al.  A stable single-longitudinal-mode dual-wavelength erbium-doped fiber ring laser with superimposed FBG and an in-line two-taper MZI filter , 2013 .

[7]  Jose L. Cruz,et al.  A dual-wavelength tunable laser with superimposed fiber Bragg gratings , 2013 .

[8]  Junfa Zhao,et al.  A switchable single- and dual-wavelength erbium fiber ring laser in single-longitudinal-mode operation , 2014 .

[9]  Gongquan Liang,et al.  Stable dual-wavelength single-longitudinal-mode ring erbium-doped fiber laser for optical generation of microwave frequency , 2012 .

[10]  Yunlong Bai,et al.  A switchable and wavelength-spacing tunable single-frequency and single-polarization dual-wavelength erbium-doped fiber laser based on a compound-cavity structure , 2014 .

[11]  Michel Tetu,et al.  Step-tunable (100 GHz) hybrid laser based on Vernier effect between Fabry-Perot cavity and sampled fibre Bragg grating , 1999 .

[12]  Ken-ichi Kitayama,et al.  Optical heterodyne detection technique for densely multiplexed millimeter-wave-band radio-on-fiber systems , 2003 .

[13]  S. Feng,et al.  Photonic generation of microwave signal by beating a dual‐wavelength single longitudinal mode erbium‐doped fiber ring laser based on the polarization maintaining fiber bragg grating , 2013 .

[14]  M. Durán-Sánchez,et al.  Tunable dual-wavelength fiber laser based on a polarization-maintaining fiber Bragg grating and a Hi-Bi fiber optical loop mirror , 2011 .

[15]  Ying Zhang,et al.  Efficient structure for optical interleavers using superimposed chirped fiber Bragg gratings , 2005, IEEE Photonics Technology Letters.

[16]  Masaya Notomi,et al.  Photonic crystal lasers using wavelength-scale embedded active region , 2014 .

[17]  Haifeng Qi,et al.  Research on a novel composite structure Er³⁺-doped DBR fiber laser with a π-phase shifted FBG. , 2013, Optics express.

[18]  Bai-Ou Guan,et al.  Dual-wavelength single-frequency fiber laser based on FP-LD injection locking for millimeter-wave generation , 2014 .

[19]  Switchable dual-wavelength erbium-doped fiber ring laser with tunable wavelength spacing based on a compact fiber filter , 2014 .

[20]  L. B. Mercer,et al.  1/f frequency noise effects on self-heterodyne linewidth measurements , 1990 .