27 March 2013 Flat pulse-amplitude rational-harmonic-mode-locking fiber lasers with GHz pulse repetition rates
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Abstract
Rational harmonic mode locking (RHML) in an active mode-locked fiber laser can increase the output pulse repetition rate a number of times the modulation frequency of an optical modulator in a cavity when driven by gigahertz (GHz) RF. The amplitudes of the output optical pulse train in a high order RHML operation are not equalized and flat due to the GHz RF drive signals. A modified RHML technique using standard instrumentation that generates 1 GHz electrical square wave signals to accomplish up to 6th order RHML in fiber lasers is presented for improving the flatness of the amplitudes of the output optical pulse train at the pulse repetition rate of up to 12 GHz.
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Tianhe Wang, Tianxin Yang, Dongfang Jia, Zhaoying Wang, Mei Sang, Neng Bai, Guifang Li, "Flat pulse-amplitude rational-harmonic-mode-locking fiber lasers with GHz pulse repetition rates", Proc. SPIE 8624, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VI, 86240Z (27 March 2013); doi: 10.1117/12.2001231; https://doi.org/10.1117/12.2001231
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