Related Experiment Video
Updated: Apr 16, 2026
Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
A practical topological insulator saturable absorber for mode-locked fiber laser
Peiguang Yan1, Rongyong Lin1, Shuangchen Ruan1
1Shenzhen key laboratory of laser engineering, College of Optoelectronic Engineering, Shenzhen University, ShenZhen, 518060, China.
Abstract:
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.
