2 μm soliton lasers in a bidirectional nonlinear polarization evolution Tm3+-doped fiber oscillator

Ni Feng, Hui Hu, Renlai Zhou* (Corresponding Author), Encai Ji, Xiaoxi Liu, Hongcan Gu* (Corresponding Author), K. Nakkeeran

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Downloads (Pure)

Abstract

We experimentally demonstrate a novel 2 μm soliton laser using a bidirectional nonlinear polarization evolution mode-locked Tm3+-doped fiber oscillator. The mode-locking operations between the laser signals propagating in clockwise and counterclockwise directions can be achieved through the intracavity polarization state adjustments independently, and the maximum achieved output powers are 332.5 and 367.8 mW with transfer efficiencies of 17.2 % and 18.3 %, respectively. Hysteresis in the output powers and spectra transformation between the two laser signals propagating in counter directions are observed and investigations are conducted in detail. Benefiting from the robust birefringence filtering effect, the central wavelength of this soliton laser can be continuously tuned from 1951.51 to 2015.89 nm. Stable high-order harmonic mode-locking (HML) operations are observed, and up to 633.02 MHz repetition rate with a central wavelength of 1992.55 nm is achieved. The monitored intensity spectra stability and average output power fluctuations exhibit excellent performance of this proposed 2 μm soliton fiber laser. The phase noise levels in two counter directions propagating light signals are characterized at different average output powers. Our experiment provides a potential technique for the generation of 2 μm solitons fiber laser that can be widely applied in ultrafast time-resolved measurements, mid-infrared frequency metrology, molecular spectroscopy, etc.

Original languageEnglish
Article number105930
Number of pages7
JournalResults in Physics
Volume41
Early online date31 Aug 2022
DOIs
Publication statusPublished - 1 Oct 2022

Bibliographical note

Funding Information:
This work is financially supported by National Natural Science Foundation of China ( 61905150 ; 61805281 ); Fundamental Research Funds for the Central Universities, China (Grant No. 3072022CFJ2501 ; 3072022CF2506 ); Natural Science Foundation of Guangdong Province, China ( 2019A1515010732 ).

Keywords

  • 2 μm soliton lasers
  • Mode-locked fiber laser
  • Nonlinear polarization evolution

Fingerprint

Dive into the research topics of '2 μm soliton lasers in a bidirectional nonlinear polarization evolution Tm3+-doped fiber oscillator'. Together they form a unique fingerprint.

Cite this