High-efficiency watt-level 1014 nm single-frequency laser based on short Yb-doped phosphate fiber amplifiers

Abstract

Atomic layer deposition coatings are under investigation to reduce the diffusion of radioxenon into plastic scintillators. This paper investigates the impact of such surface coating on the light collection efficiency in a cylindrical geometry. A high and uniform light collection efficiency is important to preserve detector resolution. Monte Carlo simulations and measurements have been carried out to study the influence of coating thickness, refractive index and surface quality. It was found that it is important to achieve a smooth coating and good optical match between the refractive indices of the coating and the plastic scintillator. Taking into account these considerations, the detector under study could be coated without a significant degradation of its resolution.

Highly Doped Phosphate Glass Fibers for Compact Lasers and Amplifiers: A Review

“…A compact fiber laser of 5 mm was reported, with a CW single transverse and longitudinal mode characterized by an output power over 164 mW, low noise and a linewidth lower than 7 kHz. At the wavelength of 1014 nm Yang et al [76] reported also a MOPA laser with over 1 W of single-frequency emission, obtained by amplifying a seed laser with a core-pumped one stage Yb 3+ -doped phosphate fiber amplifier of 4 cm of length.…”

High efficiency Yb3+-doped phosphate single-mode fibre laser

“…The fibre reported in this Letter can be applicable in demanding high quality beam compact devices but also, due to the large core, in pulsed laser solutions that are power-limited by nonlinear effects [2]. Our fibre can also find application as a laser seed due to the possibility of achieving low noise and single-frequency operation if used with narrow linewidth fibre Bragg grating [19][20][21] or as an amplifying stage in a laser system [22,23].…”

Improving the Laser Performance of Yb3+-Doped Phosphate Fiber: Population Simulation of the Yb3+ Level

“…With developing semiconductor lasers, ytterbium (Yb 3+ ) is the most suitable ion of luminescent active ions for high power laser because of its small quantum defect and simple energy level [1][2][3][4][5][6]. Due to the high solubility of Yb 3+ in phosphate glass [7], it is expected that it will be used in high-gain, short-length solid-state systems, such as single frequency lasers [8][9][10][11]. However, the narrow Stark splitting of the Yb 3+ : 2 F7/2 level leads to a serious thermal blocking effect in solid-state Yb: phosphate glass lasers [12].…”