High energy femtosecond mid-IR fiber CPA system at 2.79 µm using single mode operation of a coiled 46µm core Er:ZBLAN LMA fiber
Abstract
We demonstrate the first large-core Er: ZBLAN fiber-based chirped-pulse amplification system operating at ∼2.79 µm. Single-mode amplification in a coiled 46 µm-core, ∼0.064 NA Er:ZBLAN fiber delivers up to ∼144 µJ of stretched femtosecond pulses (∼1.5 ns) at a 5.5 kHz repetition rate. After diffraction-grating compression, ∼70 µJ pulses with a duration of ∼525 fs are obtained. This represents what is believed to be a new record pulse energy for femtosecond-duration Er: ZBLAN fiber lasers, exceeding previous results by nearly two orders of magnitude. The performance is enabled by a diffraction-grating based CPA architecture combined with large-mode-area fiber operating robustly in a single transverse mode.
Fields of Study & Subjects
Photonic Crystal and Fiber Optics
Advanced Fiber Laser Technologies
Glass properties and applications
Publication details
- Journal / source
- Optics Express
- Publisher
- Optica Publishing Group
- Volume
- 34
- Issue
- 5
- Pages
- 7674–7674
- Publication date
- 3 February 2026
- Language
- EN