All-fiber nonlinear optical switch based on polarization controller coiled SMF–GIMF–SMF for ultrashort pulse generation
| Autor: | Zhang Hongwei, Xiaohui Ma, Tiebin Wang, Linlin Shi, Xu Yingtian, Liang Jin, Dantong Wang, Chen Hualong, He Zhang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Multi-mode optical fiber business.industry Single-mode optical fiber Pulse duration Saturable absorption Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Optics Polarization controller law Fiber laser Electrical and Electronic Engineering Physical and Theoretical Chemistry Photonics business Ultrashort pulse |
| Zdroj: | Optics Communications. 452:7-11 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2019.07.004 |
| Popis: | A novel nonlinear optical switch based on a single mode fiber – graded index multimode fiber (GIMF) – single mode fiber (SMS) twined into polarization controller (PC) was proposed as a saturable absorber (SA), to generate ultrashort pulse in fiber laser. The SA device geometry, where a sandwiched GIMF section spliced to two standard SMF at both ends of GIMF, was coiled into a PC. By properly tuning the paddles of PC, mode-locking can be easily realized and the nonlinear saturable absorption characteristics of SMS-SA was changed. In the experiment, the modulation depth of the SMS-SA containing 0.6 m GIMF can be observed 9%, 10.5%, 21.7%, respectively. Based on SMS-SA mode-locking, the stable ultrafast pulse duration of 559 fs, with the FWHM bandwidth of 6.84 nm were generated. The fundamental repetition rate of 25 MHz and wavelength-tuning range of 14 nm can be obtained by adjusting the paddles. The SMS-SA excellent tunable nonlinear optical properties and all-fiber structure have strong potential application in the field of ultrafast photonics. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect