Blue up-conversion Tm3+-doped fiber laser pumped by a multiline Raman source

Abstract

We report laser oscillation at 481 nm when pumping a Tm 3+ -doped fluorozirconate fiber by two Raman-generated signals at 1117 and 1175 nm. A superior efficiency was achieved when pumping with both lines. For example, the conversion efficiency was 20% when pumping with 83 mW of 1117 nm and reached 33% when copumping with 29 mW of 1175 nm. As higher powers of the copumping signal were applied, a powerful amplified spontaneous emission at ϳ790 nm started to compete with 481 nm. The slope efficiency evolved from 16% to 48% when pumping with a simpler, noncontrolled Raman source that provided a single-to multi wavelength evolving spectrum.

Remote Temperature Sensor Based on the Up-Conversion Fluorescence Power Ratio of an Erbium-Doped Silica Fiber Pumped at 975 nm

“…An investigation of these processes were conducted to improve the development of an erbium-doped fiber amplifier (EDFA) with the goal of extending the distance of transmission in optical communication systems [1]. The investigation of non-linear processes in laser fibers has allowed for the development of new optical fiber lasers by up-conversion [2][3][4]. Currently, laser fibers are being investigated to develop new temperature sensors, as their properties of emission and absorption are dependent upon the temperature [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

Ultraviolet emission in Tm3+-doped fluoride fiber pumped with two infrared wavelengths

“…11 In particular, the 1 D 2 → 3 P 1 fourth photon absorption and the UV 1 I 6 → 3 H 6 , 3 F 4 ͑290 and 348 nm͒ emissions are associated with this effect. Hence, photodarkening investigations are important for the present pumping scheme.…”

Red laser-diode pumped 806 nm Tm3+: ZBLAN fibre laser

“…Before our work reported here, this transition has been excited with a wavelength-fixed krypton ion laser at 676.4 nm [17] which is far from the 690 nm ground state absorption peak and hence they obtained just 1.6% conversion efficiency. It also has been excited at 780 nm with a Ti:Sapphire laser [18][19][20], under up-conversion with 1064 nm using a Nd:YAG laser [21,22], with an Yb 3+ -doped fibre laser emitting at 1108 nm [23], at 1120 nm with a Raman fibre laser [24] and at 1319 nm pump using fluorogermanate glass as a host [25]. As one may note, apart from krypton-pump, little or no attention has been dedicated to this transition by pumping with more resonant (tuneable) red laser diodes (LDs) at 690 nm [26] as described later on.…”