All-Fiber 100-ns Single-Frequency 0.5mJ Anisotropic MOPA with Double Clad Tapered Yb-Doped Gain Fiber
J. Rissanen et. al. | 2019 CLEO/Europe-EQEC, Munich, pp. 1-1, 2019 | Article pdf
- High peak power, single-frequency pulsed fiber MOPA sources with extremely narrow line and nanosecond pulses are required for various applications, including coherent LIDARs systems, remote sensing, and frequency conversion.
- Stimulated Brillouin scattering (SBS) arising is a main obstacle to further peak power and pulse energy scaling.
- In this paper short (1.2m), tapered, birefringent, Ytterbium-doped, end-pumped double clad fiber MOPA system with 40μm mode field diameter for amplification of single-frequency long pulses (100ns) is presented.
Active tapered double-clad fiber with low birefringence
A. Fedotov et. al. | Opt. Express Vol. 29, pp. 16506-16519, May 2021 | Article pdf
- To solve the problem of the state of polarization drift in active large mode fibers, an active double-clad fiber with low intrinsic birefringence as a gain medium is presented.
- An Yb-doped spun tapered double-clad fiber (sT-DCF) with intrinsic birefringence as low as 1.45×10−8 was manufactured and experimentally studied.
- It has been proved experimentally that the degree of polarization and the state of polarization remain more stable in sT-DCF with increasing pump power compared to PM PANDA-type and regular non-PM tapered double-clad fibers.
- An active sT-DCF showing efficient amplification was demonstrated in an all-fiber-based picosecond master-oscillator power-amplifier scheme.
Actively Q-switched 1.6-mJ tapered double-clad ytterbium-doped fiber laser
J. Kerttula et. al. | Opt Express, 18(18):18543-9, August 2010 | Article pdf
- An actively Q-switched tapered double-clad fiber laser capable of single-shot generation of 1.6-mJ, 64-ns pulses is demonstrated.
- The active medium based on tapered double-clad fiber is shown to exhibit a reduced level of amplified spontaneous emission.
- This allows for high-energy pulse extraction at extremely low repetition rates.
