Dark pulse fiber laser
A fiber laser and dark pulse technology, applied in lasers, laser components, phonon exciters, etc., can solve the problems of pulse spectrum and time broadening, restricting the development of bright pulses, and the inability of bright pulses to achieve a large pulse width tuning range , good application prospects, simple structure effect
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[0014] A dark pulsed fiber laser such as figure 1 As shown, it consists of a semiconductor optical amplifier 1, an optical circulator 2, a bandpass filter 3, a single-mode fiber 4, a 50:50 coupler 5, a 20:80 coupler 6, an optical isolator 7, and a polarization controller 8. The optical circulator 2, the 50:50 coupler 5, and the 20:80 coupler 6 have three ports respectively. One end of the semiconductor optical amplifier 1 is connected to the b port of the optical circulator 2, and the c port is connected to the optical circulator 2. The input terminal of the bandpass filter 3, the output terminal of the bandpass filter 3 is connected to the d port of the 50:50 coupler 5, the e port of the 50:50 coupler 5 is connected to the g port of the 20:80 coupler 6, and the 20:80 The h port of the coupler 6 is connected to the input end of the optical isolator 7, and the i port of the 20:80 coupler 6 is the output end of the laser, and the output laser is used for spectrometer, spectrum a...
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