A practical topological insulator saturable absorber for mode-locked fiber laser.
A novel saturable absorber (SA) was fabricated by coating the topological insulator (TI) film on microfiber using pulsed laser deposition (PLD) method. The TISA device had an insertion loss of ~1.25 dB, a saturable intensity of 26.7 MW/cm(2), a modulation depth of ~5.7%, and a nonsaturable loss of 20.5%. Upon employing this SA device, we established a passively mode-locked EDFL and achieved nearly free-chirped soliton pulse with 286 fs of pulse duration and >73 dB of signal to noise ratio (SNR). This result clearly evidences that the PLD is an effective scheme for practical SA device fabrication.
Shenzhen key laboratory of laser engineering, College of Optoelectronic Engineering, Shenzhen University, ShenZhen, 518060, China.
Peiguang
P
Yan
Shenzhen key laboratory of laser engineering, College of Optoelectronic Engineering, Shenzhen University, ShenZhen, 518060, China.
Rongyong
R
Lin
Shenzhen key laboratory of laser engineering, College of Optoelectronic Engineering, Shenzhen University, ShenZhen, 518060, China.
Shuangchen
S
Ruan
Shenzhen key laboratory of laser engineering, College of Optoelectronic Engineering, Shenzhen University, ShenZhen, 518060, China.
Aijiang
A
Liu
Shenzhen key laboratory of laser engineering, College of Optoelectronic Engineering, Shenzhen University, ShenZhen, 518060, China.
Hao
H
Chen
Shenzhen key laboratory of laser engineering, College of Optoelectronic Engineering, Shenzhen University, ShenZhen, 518060, China.
Yuequn
Y
Zheng
Shenzhen key laboratory of laser engineering, College of Optoelectronic Engineering, Shenzhen University, ShenZhen, 518060, China.
Sifan
S
Chen
Shenzhen key laboratory of laser engineering, College of Optoelectronic Engineering, Shenzhen University, ShenZhen, 518060, China.
Chunyu
C
Guo
College of Physics Science and Technology, Shenzhen University, Shenzhen Guangdong 518060, China.
Juguang
J
Hu