High-power multi-single-frequency fiber laser frequency doubling system and method
A fiber laser and frequency doubling system technology, which is applied to lasers, laser components, phonon exciters, etc., can solve the problem of reducing the power spectral density of the frequency band
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Embodiment 1
[0065] A single-frequency laser with a line width of less than 100MHz is used. The single-frequency laser is a distributed feedback (DFB) semiconductor laser. The center wavelength can be 1064nm, and an external radio frequency signal is loaded; the signal generator uses a radio frequency signal source, and the period generated by the radio frequency signal source Sine signal, frequency 3.2GHz, output power 25dBm; phase modulator is electro-optical phase modulator EOM; fiber amplifier (4) is a rare earth doped fiber amplifier, and its gain fiber is ytterbium doped fiber; frequency doubling crystal 65 is β-bias Barium borate crystal (BBO); the resistance of thermistor 662 is 10K ohm; the heat source 663 is a heating chip. The FPGA-based digital cavity-locked servo system loads a 25MHz RF signal on the single-frequency laser and outputs a triangular wave. After being amplified by a high-voltage amplifier module, it controls the piezoelectric ceramic PZT. The frequency of the tria...
Embodiment 2
[0068] A single-frequency laser with a line width of less than 100MHz is used. The single-frequency laser is a distributed feedback (DFB) fiber laser with a center wavelength of 1064nm and an external radio frequency signal is loaded; the signal generator uses a radio frequency signal source, and the period generated by the radio frequency signal source Square wave signal with a frequency of 1.6GHz and an output power of 15dBm; the phase modulator is an electro-optical phase modulator EOM; the fiber amplifier (4) is a Raman fiber amplifier, and its gain fiber is a quartz fiber; the frequency doubling crystal 65 is a lithium triborate crystal (LBO); the resistance of the thermistor 662 is 10K ohms; the heat source 663 is a semiconductor cooling chip; the digital lock cavity servo system based on the programmable gate array FPGA loads a 15MHz radio frequency signal on the single-frequency laser, and outputs a triangular wave, After being amplified by the high-voltage amplifier mo...
Embodiment 3
[0071] A single-frequency laser with a line width of less than 100MHz is used. The single-frequency laser is an external cavity semiconductor (ECDL) laser, and the center wavelength can be 1178nm. The single-frequency laser passes through a phase modulator that loads an external radio frequency signal; the signal generator adopts radio frequency Signal source, the periodic triangular wave signal that radio frequency signal source produces, frequency 16GHz, output power 20dBm; Phase modulator is electro-optical phase modulator EOM; Fiber amplifier (4) is rare earth doped fiber amplifier, and its gain fiber is erbium-doped fiber; The frequency doubling crystal 65 is potassium titanyl phosphate crystal (KTP); the resistance of the thermistor 662 is 100 ohms; the heat source 663 is a heating plate. The digital lock cavity servo system based on programmable gate array FPGA loads a 15MHz radio frequency signal on the photoelectric phase modulator through which the single-frequency la...
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