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4 March 2015 Thermal stability of multi-longitudinal mode laser beating frequencies in hybrid semiconductor-fiber ring lasers
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Abstract
The temperature dependence of the beating frequencies in multi-longitudinal mode hybrid semiconductor-fiber based ring lasers is studied theoretically and experimentally. The variation of the beating frequency with temperature is found to be smaller for larger cavity length and lower beating order. Measured frequency variation as low as -0.24 Hz/°C is obtained for cavity length of 2.7 km. The stability of the frequency is evaluated using the Allan variance technique. The measurement is carried out for different beating frequency orders. The lowest order beating frequency has about 20x better long-term frequency stability than the beating frequency of the 100th order.
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Ahmed Shebl, Khaled Hassan, Fares Al-Arifi, Mohammed Al-Otaibi, Yasser Sabry, and Diaa Khalil "Thermal stability of multi-longitudinal mode laser beating frequencies in hybrid semiconductor-fiber ring lasers", Proc. SPIE 9344, Fiber Lasers XII: Technology, Systems, and Applications, 93442L (4 March 2015); https://doi.org/10.1117/12.2078294
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