Optical fiber to a pulsed laser pulses sub - picosecond of high energy in the band of the laser and the tool for ophthalmic surgery

摘要

The present invention relates to a pulsed laser (10) to the optical fiber, and with frequency drift for the amplification of pulses sub - picosecond of high energy comprising an oscillator (1), a fiber drawing frame (3), one or more stages of pre - amplification and a power amplifier stage comprising a section of optical fiber (4, 7) doped with erbium or co - erbium-doped - ytterbium, a pump (8) adapted to be pumped optically by coupling through the optical fiber of the power amplifier (7) and a compressor (9). According to the invention, the pump (8) of the power stage generates at least one pump wavelength λp between 1530 and 1565 nm, the emission wavelength of the laser pulses (20) is between 1565 and 1625 nm and the energy of the laser pulses (20) is between 10 and a few tens of μj nj. The present invention also relates to a tool for ophthalmic surgery comprising such a laser.