Fig. 13: Experimental setup of a few-mode fiber oscillator.
From: Transverse mode coupling in monolithic few-mode fiber laser oscillators

The setup is comprised of the fiber oscillator (blue dashed box) and the detecting system (green dashed box)
From: Transverse mode coupling in monolithic few-mode fiber laser oscillators

The setup is comprised of the fiber oscillator (blue dashed box) and the detecting system (green dashed box)