Transverse mode selection in a Nd-doped fiber amplifier at 910 nm

A 100 W all-fiber linearly-polarized Yb-doped single-mode fiber laser at 1120 nm.

A 100 W-class all-fiber linearly-polarized single-mode fiber laser at 1120 nm with an optical efficiency of 50% was demonstrated. The laser consists of a 4.2 m long Yb-doped polarization maintaining fiber with a core diameter of 10 μm and a pair of FBGs written in matched passive fiber. Linearly polarized output with a polarization extinction ratio of 15 dB is achieved by a cavity that selects ...

167 W, power scalable ytterbium-doped photonic bandgap fiber amplifier at 1178 nm.

An ytterbium-doped photonic bandgap fiber amplifier operating at the long wavelength edge of the ytterbium gain band is investigated for high power amplification. The spectral filtering effect of the photonic bandgap efficiently suppresses amplified spontaneous emission at the conventional ytterbium gain wavelengths and thus enables high power amplification at 1178 nm. A record output power of ...

Polarization maintaining, very-large-mode area, Er fiber amplifier for high energy pulses at 1572.3 nm

We demonstrate the first polarization maintaining, very-large-mode-area Er-doped fiber amplifier with ~1000 μm 2 effective area. The amplifier is core pumped by a Raman fiber laser and is used to generate single frequency one microsecond pulses with pulse energy of 368 μJ, M 2 of 1.1, and polarization extinction > 20 dB. The amplifier operates at 1572.3 nm, a wavelength useful for trace atmosph...

Mode-Filtered Fiber Amplifier

Erbium-Doped Fiber Amplifier Review

This paper is describing and investigating four crucial areas of Erbium Doped Fiber Amplifier (EDFA). First is the atomic part, where it is meaningful to give deep and details information of erbium spectra structure and its energy level. The atomic spectrum is one crucial part in defining and understanding amplification phenomena. The second part based on understanding, investigating and analyz...