Stable Single Polarization, Single Frequency, and Linear Cavity Er-Doped Fiber Laser Using a Saturable Absorber

Abstract

A simple approach for stable single polarization, single frequency, and linear cavity erbium doped fiber laser is proposed and demonstrated. A Fabry-Pérot filter, polarizer and saturable absorber are used together to ensure stable single frequency, single polarization operation. The optical signal-to-noise ratio of the laser is approximately 57 dB, and the Lorentz linewidth is 13.9 kHz. The polarization state of the laser with good stability is confirmed and the degree of polarization is >99%.

Compact and Tunable Mid-IR Light Source Based on a Dual-Wavelength Fiber Laser

“…[9] Fiber laser pumping source is another good option, which has numerous outstanding advantages such as excellent spectral properties and beam quality, wide tunability, high power and compact design. [10,11] In particular, driven by telecom applications, fiber lasers around 1.5 µm wavelength have been well-developed and become turn-key commercial products. For these reasons, various fiber laser combinations, e.g., Er and Yb doped or Er and Ho doped fiber lasers have been proposed to serve as the DFG fundamental light sources.…”