Q-switched neodymium-doped Y_3Al_5O_12-based silica fiber laser

Abstract

We present pulsed laser operation in a Nd-doped, Y3Al5O12-based silica fiber. The fiber was fabricated using the rod-in-tube technique with a Nd:YAG crystal rod as the core material and a silica tube for the cladding material. A spectroscopy study revealed that the core region had become amorphous in the process of fiber drawing. Q-switched pulsed laser operation was realized at a wavelength of 1058 nm when the fiber was cladding pumped at a wavelength of 808 nm. The laser delivered 38 μJ of energy in 65 ns pulses. The extracted energy was limited due to the multimodal operation of the fiber. Laser slope efficiency in continuous wave operation reached 52%. The spectroscopic properties of the fabricated fiber are discussed and compared to a Nd:YAG crystal and a Nd:Al-doped silica fiber.

Slow light with electromagnetically induced transparency in optical fibre

“…An optical fibre type with crystalline core and glass cladding can be fabricated using a standard optical fiber draw technique. Optical fibres with silica cladding and a core crystalline type of silicon, germanium and yttrium aluminium garnet (YAG) have been studied before [16][17][18]. In this paper, for the three-level atoms embedded in the core, we select a material system of Pr 3+ ions embedded in bulk Y 2 SiO 5 crystal and under cryogenic conditions as in [7].…”