We successfully obtain a high-average-power high-stability Q-switched green laser based on diode-side-pumped composite ceramic Nd：YAG in a straight piano-concave cavity. The temperature distribution in composite cera...We successfully obtain a high-average-power high-stability Q-switched green laser based on diode-side-pumped composite ceramic Nd：YAG in a straight piano-concave cavity. The temperature distribution in composite ceramic Nd：YAG crystal is numerically analyzed and compared with that of conventional Nd：YAG crystal. By using a composite ceramic Nd：YAG rod and a type-II high gray track resistance KTP （HGTR-KTP） crystal, a green laser with an average output power of 165 W is obtained at a repetition rate of 25 kHz, with a diode-to-green optical conversion of 14.68%, and a pulse width of 162 ns. To the best of our knowledge, both the output power and optical-to-optical efficiency are the highest values for green laser systems with intracavity frequency doubling of this novel composite ceramic Nd：YAG laser to date. The power fluctuation at around 160 W is lower than 0.3% in 2.5 hours.展开更多
目的比较研究经尿道绿激光选择性前列腺汽化术(photoselective vaporization of the prostate,PVP)与经尿道前列腺电切术(TURP)的疗效。方法将496例良性前列腺增生(BPH)患者分为两组,255例行PVP术,241例行TURP术,比较两组的手术时间、...目的比较研究经尿道绿激光选择性前列腺汽化术(photoselective vaporization of the prostate,PVP)与经尿道前列腺电切术(TURP)的疗效。方法将496例良性前列腺增生(BPH)患者分为两组,255例行PVP术,241例行TURP术,比较两组的手术时间、导尿管留置时间、术后住院天数、手术并发症。随访3个月比较两组最大尿流率(Qmax)、剩余尿量(PVR)、国际前列腺症状评分(IPSS)、生活质量评分(QOL)等指标的变化。结果 PVP组、TURP组的手术时间、导尿管留置时间、术后住院天数分别为(54.9±20.0)min及(45.1±18.0)min、(1.1±0.2)d及(3.4±0.3)d、(3.2±1.1)d及(8.8±1.3)d,组间比较差异有统计学意义(P<0.05)。术后3个月242例PVP患者和226例TURP患者获随访,Qmax、PVR、IPSS、QOL较术前均有改善,差异有统计学意义(P<0.01);组间比较差异无统计学意义(P>0.05)。结论PVP术与TURP术相比,手术安全性更好,疗效相似。展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 61107086, 61172010, and 61101058)the Science and Technology Committee of Tianjin, China (Grant No. 11JCYBJC01100)the National High Technology Research and Development Program of China (Grant No. 2011AA010205)
文摘We successfully obtain a high-average-power high-stability Q-switched green laser based on diode-side-pumped composite ceramic Nd：YAG in a straight piano-concave cavity. The temperature distribution in composite ceramic Nd：YAG crystal is numerically analyzed and compared with that of conventional Nd：YAG crystal. By using a composite ceramic Nd：YAG rod and a type-II high gray track resistance KTP （HGTR-KTP） crystal, a green laser with an average output power of 165 W is obtained at a repetition rate of 25 kHz, with a diode-to-green optical conversion of 14.68%, and a pulse width of 162 ns. To the best of our knowledge, both the output power and optical-to-optical efficiency are the highest values for green laser systems with intracavity frequency doubling of this novel composite ceramic Nd：YAG laser to date. The power fluctuation at around 160 W is lower than 0.3% in 2.5 hours.
文摘目的比较研究经尿道绿激光选择性前列腺汽化术(photoselective vaporization of the prostate,PVP)与经尿道前列腺电切术(TURP)的疗效。方法将496例良性前列腺增生(BPH)患者分为两组,255例行PVP术,241例行TURP术,比较两组的手术时间、导尿管留置时间、术后住院天数、手术并发症。随访3个月比较两组最大尿流率(Qmax)、剩余尿量(PVR)、国际前列腺症状评分(IPSS)、生活质量评分(QOL)等指标的变化。结果 PVP组、TURP组的手术时间、导尿管留置时间、术后住院天数分别为(54.9±20.0)min及(45.1±18.0)min、(1.1±0.2)d及(3.4±0.3)d、(3.2±1.1)d及(8.8±1.3)d,组间比较差异有统计学意义(P<0.05)。术后3个月242例PVP患者和226例TURP患者获随访,Qmax、PVR、IPSS、QOL较术前均有改善,差异有统计学意义(P<0.01);组间比较差异无统计学意义(P>0.05)。结论PVP术与TURP术相比,手术安全性更好,疗效相似。
