Fpga-based control system and method for ti:sapphire laser

A Field-Programmable Gate Array (FPGA)-based control system for a titanium:sapphire (Ti:sapphire) laser, comprising:

• a laser control module, a pump source, a first plano-concave mirror, a second plano-concave mirror, a first plane mirror, a second plane mirror, a Ti:sapphire crystal, a birefringent filter, a piezoelectric rotation motor, piezoelectric ceramic, a piezoelectric control board, an etalon, a galvanometer motor, a first beam splitter, a photodetector, a second beam splitter, and a high-precision wavelength meter, wherein
• the pump source is configured to emit laser light;
• the first plano-concave mirror is located on an outgoing path of the laser light;
• the Ti:sapphire crystal and the second plano-concave mirror are sequentially arranged on an outgoing path of the first plano-concave mirror;
• the Ti:sapphire crystal is arranged between the first plano-concave mirror and the second plano-concave mirror at a Brewster's angle;
• the piezoelectric rotation motor and the first plane mirror are sequentially arranged on a reflection path of the second plano-concave mirror;
• the birefringent filter is disposed inside the piezoelectric rotation motor;
• the piezoelectric control board is connected to the piezoelectric rotation motor;
• the piezoelectric ceramic is bonded to the first plane mirror;
• the galvanometer motor and the second plane mirror are sequentially arranged on a reflection path of the first plane mirror;
• the etalon is disposed inside the galvanometer motor;
• the first plano-concave mirror is also located on a reflection path of the second plane mirror;
• the first beam splitter and the second beam splitter are sequentially arranged on an outgoing path of the second plane mirror;
• the photodetector is disposed on a reflection path of the first beam splitter;
• the high-precision wavelength meter is disposed on a reflection path of the second beam splitter;
• the piezoelectric ceramic, the piezoelectric control board, the galvanometer motor, the photodetector, and the high-precision wavelength meter are all connected to the laser control module;
• the high-precision wavelength meter is configured to read a current wavelength value of laser light emitted by the Ti:sapphire laser;
• the pump source, the first plano-concave mirror, the second plano-concave mirror, the first plane mirror, the second plane mirror, the Ti:sapphire crystal, the birefringent filter, the piezoelectric rotation motor, the piezoelectric ceramic, the etalon, and the galvanometer motor constitute the Ti:sapphire laser;
• and
• the laser control module sequentially controls the piezoelectric control board, the galvanometer motor, and the piezoelectric ceramic according to the current wavelength value and a target wavelength value to adjust a wavelength of the laser light emitted by the Ti:sapphire laser.