Pulsed HF and Er:YAG laser radiation transmission through sapphire and fluoride glass fibers

Serafetinides, A. A.; Fabrikesi, Eugenia T.; Chourdakis, G.; Αναστασοπούλου, Νικολέττα

doi:10.1117/12.336948

Cited by 8 publications

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“…Therefore, Garrand et al [16] recommend the use of an ultraviolet laser for fluorescence diagnosis and a mid-infrared laser for ablation in a fluorescence guided laser angioplasty system. Fortunately, the latest reports on the availability of effective waveguide or fiber optic guidance of 3 m laser radiation [37,38] may accelerate the possible realization of such a "smart" laser angioplasty system.…”

Section: Discussionmentioning

confidence: 98%

Spectroscopic characterisation of carotid atherosclerotic plaque by laser induced fluorescence

et al. 2000

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Section: Discussionmentioning

confidence: 98%

Spectroscopic characterisation of carotid atherosclerotic plaque by laser induced fluorescence

et al. 2000

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“…Several mid-infrared optical fiber delivery systems are commercially available, with the most promising being sapphire and germanium oxide optical fibers and hollow waveguides [13]. Previous studies have shown that Q-switched Er:YAG laser radiation can be transmitted through these fibers, but at relatively low pulse energies of less than 1 0 mJ [14][15][16][17][18][19]. This pulse energy may be insufficient for medical applications involving hard tissue ablation.…”

Section: Introductionmentioning

confidence: 99%

Transmission of free-running and Q-switched erbium: YSGG laser radiation through sapphire and germanium fibers

Fried

Yang

Chaney

et al. 2004

Optical Fibers and Sensors for Medical Applications IV

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The Erbium:YAG (2 = 2.94 tm) and Erbium:YSGG (X 2.79 pm) lasers are cunently being used for tissue ablation in several medical specialties, including dermatology, ophthalmology and dentistry. Some of these applications may benefit from the availability of an optical fiber capable of delivering sufficient short-pulse, Q-switched Erbium laser energy for precise and rapid ablation of hard and soft tissues. Fiber transmission studies were conducted using both free-running (300 ps) and Q-switched (500 ns) Er:YSGG laser pulses delivered at 3 Hz through 1-meter-long samples of 450-jim germanium oxide and 425-tm sapphire optical fibers. Fiber optic transmission of free-running Er:YSGG laser radiation averaged 76% and 88% for the germanium and sapphire fibers (n = 7), respectively.Transmission of Q-switched Er:YSGG laser radiation averaged 57% and 65% for the germanium and sapphire fibers (n = 7), respectively. Fiber optic transmission of Q-switched pulse energies as high as 42 mJ was achieved through the fibers. However, damage at the input ends of the fibers began to occur at input I output pulse energies above 40 mJ I 25 mJ (n = 2), respectively. Both germanium oxide and sapphire optical fibers are capable of transmitting sufficient free-running and Q-switched Er:YSGG laser radiation for hard and soft tissue ablation.

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Transmission of Q-switched erbium:YSGG (?=2.79�?m) and erbium:YAG (?=2.94�?m) laser radiation through germanium oxide and sapphire optical fibres at high pulse energies

et al. 2004

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The erbium:YSGG and erbium:YAG lasers are used for tissue ablation in dermatology, dentistry and ophthalmology. The purpose of this study was to compare germanium oxide and sapphire optical fibres for transmission of sufficient Q-switched erbium laser pulse energies for potential use in both soft and hard tissue ablation applications. Fibre transmission studies were conducted with Q-switched (500 ns) Er:YSGG (lambda=2.79 microm) and Er:YAG (lambda=2.94 microm) laser pulses delivered at 3 Hz through 1-m-long, 450-mum germanium oxide and 425-mum sapphire optical fibres. Transmission of free-running (300 micros) Er:YSGG and Er:YAG laser pulses was also conducted for comparison. Each set of measurements was carried out on seven different sapphire or germanium fibres, and the data were then averaged. Fibre attenuation of Q-switched Er:YSGG laser energy measured 1.3+/-0.1 dB/m and 1.0+/-0.2 dB/m for the germanium and sapphire fibres, respectively. Attenuation of Q-switched Er:YAG laser energy measured 0.9+/-0.3 dB/m and 0.6+/-0.2 dB/m, respectively. A maximum Q-switched Er:YSGG pulse energy of 42 mJ (26-30 J/cm(2)) was transmitted through the fibres. However, fibre tip damage was observed at energies exceeding 25 mJ (n=2). Both germanium oxide and sapphire optical fibres transmitted sufficient Q-switched Er:YSGG and Er:YAG laser radiation for use in both soft and hard tissue ablation. This is the first report of germanium and sapphire fibre optic transmission of Q-switched erbium laser energies of 25-42 mJ per pulse.

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Pulsed HF and Er:YAG laser radiation transmission through sapphire and fluoride glass fibers

Cited by 8 publications

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Spectroscopic characterisation of carotid atherosclerotic plaque by laser induced fluorescence

Spectroscopic characterisation of carotid atherosclerotic plaque by laser induced fluorescence

Transmission of free-running and Q-switched erbium: YSGG laser radiation through sapphire and germanium fibers

Transmission of Q-switched erbium:YSGG (?=2.79�?m) and erbium:YAG (?=2.94�?m) laser radiation through germanium oxide and sapphire optical fibres at high pulse energies

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