60 mW 1.5 /spl mu/m single-frequency low-noise fiber laser MOPA

Multi-Wavelength Fiber Lasers

“…It is thus well suited for robust single longitudinal mode operation. They are also suitable for master oscillator power amplifier (MO-PA) [21] applications since it is usually easy to recover unabsorbed pump power at the output coupler. An example of a linear cavity is presented in Figure 5.…”

Optimization of erbium-doped fiber MOPA laser

“…The MOPA structure exploits a linear fiber cavity to produce a low-power fiber laser and a power amplifier cascaded at the output of the lowpower laser for boosting the lasing power. Compared to 30-40% pump conversion efficiency for most erbium-doped fiber lasers without power amplifiers, the erbium-doped fiber based MOPA laser structure effectively raises pump conversion efficiency to 50% at the 1.55 lm band [13,14,18,19]. Additionally, double-clad ytterbium based MOPA laser can convert 80% pump power to 500 W lasing power at the 1.06 lm band [17].…”

Study on the characteristics of the λ/4 phase-shift DFB Yb3+-doped fiber lasers

“…Distribute Bragg reflector (DBR) fiber lasers have been reported [1,2], but they typically need to be short (a few centimeters) to be reasonably robust against mode-hopping, which is one of the key requirements of single frequency lasers. Longer fiber lasers would be desirable if frequency stability could be maintained, especially since the optical line width in long fiber lasers would be desirable if frequency stability could be maintained.…”