TY - CHAP
T1 - Soft tissue ablation by picosecond synchronously-pumped CdSiP -based optical parametric oscillator tuned to 6.45 μm
AU - Hendaoui, N.
AU - Mani, A.A.
AU - Kakudgi, E.
AU - Peremans, A.
AU - Silien, C.
AU - Bruyninckx-Calis, Vincent
AU - Esteban, A.
AU - Ebrahim-Zadeh, M.
AU - Been, S.
AU - Verdaasdonk, R.M.
AU - Schunemann, P.G.
AU - Zawilski, K.T.
AU - Petrov, V.
PY - 2011/1/1
Y1 - 2011/1/1
N2 - Optical parametric oscillators (OPOs) are attractive tools for research on tissue ablation upon infrared irradiation. Here, we report on the performance of several mid-infrared nonlinear crystals, namely type I and type II AgGaS (AGS) and type I CdSiP (CSP), used in synchronously-pumped OPOs tuned to a wavelength of 6.45 μm, coinciding with the amide II absorption band of proteins. CSP-based OPOs clearly exhibit better performance in comparison to AGS: First, the oscillation threshold with CSP is three (five) times lower than type II (type I) AGS. Second, the idler conversion efficiency is more favourable for CSP and allows reaching 27.5 mW of idler average power, while 13 and 6 mW are obtained with type II and type I AGS, respectively. Such performance makes CSP suitable for high power 6.45 μm surgical applications. Preliminary ablation experiments on liver tissues with our CSP-based OPO highlight the promising future of CSP in medical applications.
AB - Optical parametric oscillators (OPOs) are attractive tools for research on tissue ablation upon infrared irradiation. Here, we report on the performance of several mid-infrared nonlinear crystals, namely type I and type II AgGaS (AGS) and type I CdSiP (CSP), used in synchronously-pumped OPOs tuned to a wavelength of 6.45 μm, coinciding with the amide II absorption band of proteins. CSP-based OPOs clearly exhibit better performance in comparison to AGS: First, the oscillation threshold with CSP is three (five) times lower than type II (type I) AGS. Second, the idler conversion efficiency is more favourable for CSP and allows reaching 27.5 mW of idler average power, while 13 and 6 mW are obtained with type II and type I AGS, respectively. Such performance makes CSP suitable for high power 6.45 μm surgical applications. Preliminary ablation experiments on liver tissues with our CSP-based OPO highlight the promising future of CSP in medical applications.
UR - http://www.scopus.com/inward/record.url?scp=79960753422&partnerID=8YFLogxK
U2 - 10.1117/12.889998
DO - 10.1117/12.889998
M3 - Chapter
AN - SCOPUS:79960753422
SN - 9780819486899
VL - 8092
BT - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
ER -