Chuanhang Zou

Mode-Locked Erbium-Doped Fiber Lasers Using 45° Tilted Fiber Grating

We have systematically studied the 45° tilted fiber grating (45TFG) as a functional device for erbium-doped fiber laser (EDFL) mode locking. A number of 45TFGs with different polarization-dependent loss (PDL) have been fabricated. Mode-locked (EDFL) using these devices have been characterized in terms of threshold, pulse duration, signal-to-noise ratio, and spectral width. Our results show that a 45TFG with higher PDL could achieve better laser results. By using a 45TFG with 24 dB PDL, the mode-locked laser has 8.1% conversion efficiency and a threshold of 200 mW.

Observation of 550 MHz passively harmonic mode-locked pulses at L-band in an Er-doped fiber laser using carbon nanotubes film

We demonstrate a passively harmonic mode-locked (PHML) fiber laser operating at the L-band using carbon nanotubes polyvinyl alcohol (CNTs-PVA) film. Under suitable pump power and an appropriate setting of the polarization controller (PC), the 54th harmonic pulses at the L-band are generated with the side mode suppression ratio (SMSR) better than 44 dB and a repetition frequency of 503.37 MHz. Further increasing the pump power leads to a higher frequency of 550 MHz with compromised stability of 38.5 dB SMSR. To the best of our knowledge, this is the first demonstration on the generation of L-band PHML pulses from an Er-doped fiber laser based on CNTs.

Passively harmonic mode-locked erbium-doped fiber laser at a 580 MHz repetition rate based on carbon nanotubes film

Qianqian Huang(黄千千), Tianxing Wang(王天行), Chuanhang Zou(邹传杭), Mohammed AlAraimi, Aleksey Rozhin, and Chengbo Mou(牟成博)* Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China Aston Institute of Photonic Technologies (AIPT), Aston University, Birmingham, B4 7ET, United Kingdom Nanoscience Research Group, Aston University, Birmingham, B4 7ET, United Kingdom Al Musanna College of Technology, Muladdah, Al Musanna, P.O.Box 191, P.C.314, Sultanate of Oman *Corresponding author: mouc1@shu.edu.cn

Tunable mode locked Erbium-doped fiber laser based a tilted fiber grating and carbon nanotube saturable absorber

We demonstrate a continuous tunable mode locked Erbium fiber laser using a tilted fiber grating based birefringent filter and carbon nanotube based saturable absorber. The central wavelength can be tuned from 1558 nm to 1564 nm while maintaining ultrashort pulse emission.