Medical laser probe for hard tissue treatment

摘要

Laser probe, detachably fitted at the front end of a handle for treating hard organic tissue, consists of an optical fibre (9) with a core (25) and a cladding (27) and has a refractive index distribution in which the refractive index at the centre of the core is lower than that in the surrounding core region, the probe being used with laser light of wavelength 1.0-5.5 microns, output energy 1-2500 mJ, pulse width 1-9 msec. and pulse cycle 1-200 pulses per sec. The core (25) consists of SiO2 with a lower GeO2 concentration in its peripheral region than that in its central region; a fluorine-containing SiO2 interlayer (26) is provided between the core (25) and cladding (27); and the cladding (27) consists purely of SiO2.