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A Continuously Tunable Erbium-Doped Fibre Laser Using Tunable Fibre Bragg Gratings and Optical Circulator |
| LIU Peng1,2,3, YAN Feng-Ping1,2, LI Jian1,2, WANG Lin1,2, NING Ti-Gang1,2, GONG Tao-Rong1,2, JIAN Shui-Sheng1,2 |
| 1Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 1000442Key Lab of All Optical Network and Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 1000443Department of Physics, Xingtai College, Xingtai 054001 |
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| Cite this article: |
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LIU Peng, YAN Feng-Ping, LI Jian et al 2008 Chin. Phys. Lett. 25 4276-4279 |
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Abstract A continuously tunable erbium-doped fibre laser (TEDFL) based on tunable fibre Bragger grating (TFBG) and a three-port optical circulator (OC) is proposed and demonstrated. The OC acts as a 100%-reflective mirror. A strain-induced uniform fibre Bragger grating (FBG) which functions as a partial-reflecting mirror is implemented in the linear cavity. By applying axial strain onto the TFBG, a continuously tunable lasing output can be realized. The wavelength tuning range covers approximately 7.00nm in C band (from 1543.6161 to 1550.3307nm). The side mode suppression ratio (SMSR) is better than 50dB, and the 3dB bandwidth of the laser is less than 0.01nm. Moreover, an array waveguide grating (AWG) is inserted into the cavity for wavelength preselecting, and a 50km transmission experiment was performed using our TEDFL at a 10Gb/s modulation rate.
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| Keywords:
42.55.Wd
42.60.-v
42.60.Pk
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Received: 27 July 2008
Published: 27 November 2008
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