Abstract
A very large mode-area 2 wt% erbium-doped double-clad phosphate fiber with a core diameter of 60 μm and core numerical aperture of 0.03 was fabricated and used for the last stage amplifier of an all-fiber pulsed laser master-oscillator power amplifier (MOPA) at 1550 nm. The Er3+double-clad phosphate fiber has a cladding-core ratio of 2.17 and a V number of 3.6 at 1550 nm. 3 mJ pulses with 21.5 ns duration were obtained with Gaussian-like spatial beam profile with only a 75 cm long phosphate gain fiber.
| Original language | English (US) |
|---|---|
| Article number | 9249014 |
| Pages (from-to) | 1481-1484 |
| Number of pages | 4 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 32 |
| Issue number | 23 |
| DOIs | |
| State | Published - Dec 1 2020 |
Keywords
- Erbium-doped fiber amplifiers
- Optical fibers
- Optical pulses
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering