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Switchable generation of a sub-200 fs dissipative soliton and a noise-like pulse in a normal-dispersion Tm-doped mode-locked fiber laser
- Source :
- Applied optics. 59(12)
- Publication Year :
- 2020
-
Abstract
- We report on the switchable generation of a dissipative soliton (DS) pulse and a noise-like pulse (NLP) in an all-fiberized Tm-doped fiber laser in the normal-dispersion region. Mode-locking operation is achieved through a nonlinear polarization rotation component, and the cavity dispersion is compensated using ultra-high numerical aperture (UHNA4) fiber that is easy to integrate and low in cost. At a pump threshold of 510 mW, DS operation can first be achieved without additional filter. The 3 dB spectrum bandwidth of the DS pulse is greater than 50 nm, and the duration of the de-chirped pulse is 193 fs. By increasing the pump power to 880 mW, the mode-locking state can evolve into NLP operation with proper cavity polarization state. The 3 dB spectrum bandwidth and duration of de-chirped coherence spike are 105.6 nm and 121 fs, respectively. Meanwhile, ultra-broadband NLP (over 150 nm considering 3 dB spectrum width) can also be observed with the appropriate cavity parameters. All the proposed pulse patterns present good capacity for achieving narrow pulse width and withstanding high pulse energy.
- Subjects :
- Materials science
medicine.diagnostic_test
business.industry
Bandwidth (signal processing)
Physics::Optics
Polarization (waves)
01 natural sciences
Atomic and Molecular Physics, and Optics
Numerical aperture
010309 optics
Dissipative soliton
Optics
Mode-locking
Optical coherence tomography
Fiber laser
0103 physical sciences
medicine
Electrical and Electronic Engineering
business
Engineering (miscellaneous)
Pulse-width modulation
Subjects
Details
- ISSN :
- 15394522
- Volume :
- 59
- Issue :
- 12
- Database :
- OpenAIRE
- Journal :
- Applied optics
- Accession number :
- edsair.doi.dedup.....6945cd38a94123a27de8f4a9499b05a2