Passive Fiber with Pedestal in a 213-W Continuous Wave Monolithic Tm3+-Doped Fiber Laser at 1.94 µm

Abstract

The output of a 43%-efficient continuous-wave monolithic single-oscillator Tm3+-doped fiber laser emitting 213 W at 1.94 µm is made by a passive fiber with pedestal to improve its beam quality by reducing the pedestal-to-cladding coupling.

Latest advances on 2 µm fiber lasers and fibered components for all-fibered architectures

“…-either on 793-nm-diode-pumped Tm 3+ -doped silica fiber lasers to emit directly at 2.09 µm [1] or eventually used with an emission at 1.94 µm to pump Ho 3+ -doped silica fibers to emit above 2.1 µm [2,3] -or 793-nm-diode-pumped Tm 3+ , Ho 3+ -codoped silica fiber lasers directly emitting around 2.1 µm [4,5], as represented in Figure 1. The general setup of Figure 1 consists in a Double Clad (DC) active fiber doped (or codoped) with Tm 3+ (or Tm 3+ and Ho 3+ ) ions, pumped from both sides by four 793-nm fiber-coupled laser diodes (LD).…”