Tunable Spacing Dual-Wavelength Q-Switched Fiber Laser Based on Tunable FBG Device
Nurnazifah M. Radzi,
Amirah A. Latif,
Mohammad F. Ismail,
Josephine Y. C. Liew,
Noor A. Awang,
Han K. Lee,
Fauzan Ahmad,
Siti F. Norizan,
Harith Ahmad
Affiliations
Nurnazifah M. Radzi
Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia
Amirah A. Latif
Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia
Mohammad F. Ismail
Photonics Research Centre, University of Malaya, Kuala 50603, Malaysia
Josephine Y. C. Liew
Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia
Noor A. Awang
Optical Fiber Laser Technology (OpFLAT) Focus Group, Department of Physics and Chemistry, Faculty of Applied Sciences and Technology, Universiti Tun Hussein Onn Malaysia, Pagoh 84600, Malaysia
Han K. Lee
Department of Electronic Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan Universiti Bandar Barat, Kampar 31900, Malaysia
Fauzan Ahmad
Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, Kuala 54100, Malaysia
Siti F. Norizan
Department of Physics, International Islamic University of Malaysia, Kuantan 25000, Malaysia
Harith Ahmad
Photonics Research Centre, University of Malaya, Kuala 50603, Malaysia
A tunable spacing dual-wavelength Q-switched fiber laser is experimentally demonstrated based on a fiber Bragg grating tunable device incorporated in an erbium-doped fiber laser (EDFL). The system utilizes two identical fiber Bragg gratings (FBGs) at 1547.1 nm origin to enable two laser lines operation. The wavelength separations between two laser lines are controlled by fixing one of the FBGs while applying mechanical stretch and compression to the other one, using a fiber Bragg grating tunable device. The seven steps of wavelength spacing could be tuned from 0.3344 to 0.0469 nm spacing. Pulse characteristics for both close and wide spacing of dual-wavelength Q-switched fiber laser are successfully being recorded. The findings demonstrate the latest idea of dual-wavelength fiber laser based on FBG tunable device, which offers a wide range of future applications.
