Figure 1
From: Diversified pulse generation from frequency shifted feedback Tm-doped fibre lasers
The schematic diagram of the FBG-pair-based FSF mode-locked fibre laser.
TDF, thulium-doped fibre; WDM, wavelength division multiplexer; HR-FBG, high-reflectivity fibre Bragg grating; LR-FBG, low-reflectivity fibre Bragg grating; AOM, acousto-optical modulator; RF driver, radio frequency driver.
