APPLICATION NOTE

All-Fiber ASE Filters for the Design of High-Power Fiber Lasers and Amplifiers

Written by Samuel Gouin, eng., M. Sc. | Product Line Manager - Fiber Laser Components

September 2024 | Amplified Spontaneous Emission (ASE) can be a major challenge in fiber laser and amplifier designs, especially when targeting high gain, high energy, or non-standard wavelengths. Common methods to suppress ASE - like large core areas, W-type refractive index profiles, isolators, or bandpass filters - each have limitations, such as degraded beam quality, restricted pump power, or inefficiency at high power levels. Innovative solutions are needed to overcome these obstacles without compromising performance.