Halder, Arindam and Saidin, N and Zen, D I M and Damanhuri, S S A and Harun, Sulaiman Wadi and Ahmad, Harith and Dimyati, K and Paul, Mukul Chandra and Das, Shyamal and Bhadra, Shyamal Kumar (2014) Thulium bismuth co-doped fiber lasers at 1901 nm by 802 nm pumping. IEEE Journal of Selected Topics in Quantum Electronics, 20 (5). Article No.-0902106. ISSN 1077-260X

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We demonstrate an efficient fiber laser operating at 1901.6 nm using a new Thulium Bismuth co-doped fiber (TBF) under 802 nm pumping. The TBF was fabricated using modified chemical vapor deposition process associated with optimized solution doping techniques. The TBF lasers at 1901.6 nm are obtained at a noticeably low threshold pump power of 75-92 mW using two fiber Bragg gratings in a Fabry-Perot cavity. The highest efficiency of 42.2% is achieved using a 0.4 m long TBF fiber with a core dopant concentrations (in wt%) of 0.35 Bi2O3, 0.9 Tm2O3, 3.0 Al2O3 and 4.0 GeO2. Compared to the laser from a commercially available Thulium-doped fiber, the proposed laser has a significantly higher efficiency and lower threshold pump power. This is attributed to the incorporation of Bi ions in the gain medium which helps to increase the F-3(4) population through energy transfer processes. The maximum output power of 52.7m W is achieved at the pump power of 195 mW.

Item Type: Article
Subjects: Processing Science
Divisions: Sensor and Actuator
Depositing User: Bidhan Chaudhuri
Date Deposited: 01 Jun 2015 11:46
Last Modified: 01 Jun 2015 11:46
URI: http://cgcri.csircentral.net/id/eprint/2840

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