Title :
Few-Mode Cr-Doped Crystalline Core Fibers for Fiber Amplifier
Author :
Wang, Wei-Lun ; Wang, Jau-Sheng ; Huang, Yi-Chung ; Liu, Li-Wei ; Huang, Sheng-Lung ; Cheng, Wood-Hi
Author_Institution :
Dept. of Photonics, Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Abstract :
A few-mode Cr-doped crystalline core fiber (FMCDCCF) is demonstrated. The fiber fabrication is a modified laser-heated pedestal growth (LHPG) technique that consists of over cladding a Cr:YAG crystal rod with silica and then fine tuning its core size with multiple core reduction through the LHPG system. The FMCDCCF exhibits a core diameter of 2 μm and a V-value around 3.77 to provide the few-mode characteristics. The optical properties of the FMCDCCF are similar to that of a pristine Cr4+:YAG crystalline. A gross gain of the FMCDCCF is measured around 2.3 dB at a wavelength of 1.4 μm.
Keywords :
chromium; laser tuning; optical fibre amplifiers; optical fibre cladding; optical fibre fabrication; silicon compounds; Cr:YAG crystal rod; SiO2; V-value; YAG:Cr4+; cladding; core size; few-mode Cr-doped crystalline core fibers; fiber amplifier; fiber fabrication; fine tuning; modified laser-heated pedestal growth; multiple core reduction; optical properties; silica; size 2 mum; wavelength 1.4 mum; Crystals; Fiber lasers; Gain; Optical fiber amplifiers; Optical fiber communication; Optical fiber devices; Few-mode crystalline core fiber (FMCDCCF); fiber fabrication; fiber laser; gross gain;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2211346
