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Nd:YAG water mist laser treatment for giant gestational gingival tumor: A case report
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作者 Hong-Yu Chen Jun-Ji Xu +1 位作者 Xiu-Lin Chang Pei Wu 《World Journal of Clinical Cases》 SCIE 2024年第11期1974-1979,共6页
BACKGROUND This case of gestational gingival tumor is huge and extremely rare in clinical practice.As the growth location of this gingival tumor is in the upper anterior tooth area,it seriously affects the pregnant wo... BACKGROUND This case of gestational gingival tumor is huge and extremely rare in clinical practice.As the growth location of this gingival tumor is in the upper anterior tooth area,it seriously affects the pregnant woman's speech and food,causing great pain to the patient.The use of Nd:YGA water mist laser to remove the gingival tumor resulted in minimal intraoperative bleeding,minimal adverse reactions,and good postoperative healing,which is worthy of clinical promotion and application.CASE SUMMARY The patient,a pregnant woman,reported a large lump in her mouth on the first day of postpartum treatment.Based on medical history and clinical examination,the diagnosis was diagnosed as gestational gingival tumor.Postoperative pathological biopsy also confirmed this diagnosis.The use of Nd:YAG water mist laser to remove the tumor resulted in minimal intraoperative bleeding,clear surgical field of view,short surgical time,and good postoperative healing.CONCLUSION In comparison to traditional surgery,Nd:YAG water mist laser surgery is minimally invasive,minimizes cell damage,reduces bleeding,ensures a clear field of vision,and virtually eliminates postoperative edema,carbonization,and the risk of cross infection.It has unique advantages in oral soft tissue surgery for pregnant patients.Therefore,the clinical application of Nd:YAG water mist laser for the treatment of gestational gingival tumors is an ideal choice. 展开更多
关键词 Gestational gingival tumor Nd:YAG water mist laser Granulomatous gingival tumor Minimally invasive dentistry Pregnancy related diseases Oral soft tissue surgery Case report
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Ureteroscopy with Holmium: YAG Laser—A Initial Study in the Urology Department of the Pr Bocar Sidy Sall University Hospital of Kati
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作者 Amadou Kassogue Idrissa Sissoko +11 位作者 Daouda Sangare Moussa Salifou Diallo Hamed Sylla Mahamadou Traore Boureima Coulibaly Salia Coulibaly Modibo Diakite Modibo Togola Fadima Tall Ilias Guindo Ben Naoum Kamel Mamadou Lamine Diakite 《Open Journal of Urology》 2024年第4期207-216,共10页
Introduction: Ureteroscopy is a minimally invasive endoscopic surgery which provides access to the ureter, pyelon and calyceal cavities via the urethra and the bladder. Laser ureteroscopy uses the laser as an energy s... Introduction: Ureteroscopy is a minimally invasive endoscopic surgery which provides access to the ureter, pyelon and calyceal cavities via the urethra and the bladder. Laser ureteroscopy uses the laser as an energy source to treat the stone and eliminate it naturally. Minimally invasive endoscopic methods are struggling to become popular in sub-Saharan African countries, especially for the upper urinary tract. The objective of our work was to report the results of our first laser ureteroscopy experience in the department. Materials and Methods: This was a prospective and descriptive study running from December 1, 2023 to February 19, 2024. Included in our study was any case of upper urinary tract stone operated by Laser ureteroscopy. The characteristics of the lithiasis were determined by CT scan. Sterilization of urine was verified by carrying out a cytobacteriological examination of urine. Ureteral lithiasis was approached by semi-rigid ureteroscopy. Renal lithiasis was immediately addressed by flexible ureteroscopy. Ureteroscopy was coupled with a Holmium YAG laser. A double J ureteral catheter was placed after the operation. A 230 µm laser fiber was used in each case with a generator with a power of 35 watts (Storz Calculase III type). An access sheath was used in all cases of flexible ureteroscopy. The parameters studied were: sociodemographic characteristics, lithiasis (site, size, number, density, topography), type of anesthesia, duration of laser use, duration of intervention, postoperative outcomes. Data entry and analysis were carried out using the software (Word 2016 and SPSS). Result: We collected 30 cases of laser ureteroscopy. The average age was 37 years with extremes of 9 and 79 years. The male gender was more represented. The most common age group was 24-39 years old. Renal colic was the most frequent reason for admission, 12 patients (40%). On physical examination, lumbar tenderness was present in 47% (14 patients). ECBU was positive in 4 patients (13%). CT scan was performed in all our patients before the intervention. The average stone size was 12 mm and the largest was 23 mm. The majority of stones, i.e. 59% (18 patients), had a density greater than 1000 HU. The stone was unique in 19 patients (63%). The location of the stone was pyelic in 8 patients or 27%. An impact on the upper urinary tract was found in 16 of our patients or 53%. General anesthesia was used in 25 patients (83%). A digital flexible ureteroscopy was used in 24 patients and a semi-rigid ureteroscopy (URS) in 6 patients. Full-course fragmentation was the most used therapeutic method, 9 patients or 32%. The average duration of interventions was 61 minutes. Drainage by double J catheter at the end of the procedure was performed in all our patients. The length of hospitalization was 24 hours. Only one case of failure in the USSR was recorded, and one case of failure was in the semi-rigid URS. Conclusion: Laser ureteroscopy is an effective minimally invasive surgery in the management of lithiasis of the upper urinary tract. It significantly reduces the length of hospitalization. Mastery of this technique and the acquisition of the equipment necessary for its implementation is an undeniable asset in the management of renal and ureteral lithiasis. 展开更多
关键词 URETEROSCOPY SEMI-RIGID Flexible Holmium YAG laser
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Stability of neodymium:YAG laser posterior capsulotomy in eyes with capsular tension rings 被引量:1
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作者 Yang Kyung Cho Min Sun Kim 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2023年第6期891-896,共6页
·AIM: To evaluate the stability of neodymium(Nd):YAG laser posterior capsulotomy in eyes with capsular tension rings(CTRs).·METHODS: A total of 60 eyes that underwent cataract surgery and laser posterior cap... ·AIM: To evaluate the stability of neodymium(Nd):YAG laser posterior capsulotomy in eyes with capsular tension rings(CTRs).·METHODS: A total of 60 eyes that underwent cataract surgery and laser posterior capsulotomy postoperatively were included in this retrospective cohort study. To evaluate the safety and stability of capsulotomy, changes in the size of posterior capsulotomy and anterior chamber depth(ACD) in three groups: the group without CTR, the group with 12 mm CTRs, and the group with 13 mm CTRs, at 1wk, 3, 12, and 15mo after capsulotomy, were compared. ·RESULTS: In the group without CTR and the group with 12 mm CTR, there was no significant change in ACD at every post-laser follow-up. In the group with 13 mm CTR, the ACD change was significant until 3mo after capsulotomy. In all groups, there was a significant increase in the area of capsulotomy between 1wk and 3mo post-laser. Between 3 and 12mo post-laser, only the group with 13 mm CTR showed a significant increase in the area of capsulotomy(P<0.01). ·CONCLUSION: Laser posterior capsulotomy is safe in all three groups. The capsulotomy and ACD become stabilized and have not shown significant changes since 1y postlaser, even with larger CTRs. The maintenance of centrifugal capsular tension can last longer with larger CTRs, and the stability of the capsulotomy site can be reached about 12mo after capsulotomy in pseudophakic eyes with larger CTRs. 展开更多
关键词 Nd:YAG laser CAPSULOTOMY capsular tension ring
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Long-term efficacy and safety of YAG laser vitreolysis for vision degrading myodesopsia 被引量:1
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作者 Tie-Zhu Lin Cheng Shi +3 位作者 Xing Yang Emmanuel Eric Pazo Yan-Nian Hui Li-Jun Shen 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2023年第11期1800-1805,共6页
AIM:To assess the long-term efficacy and safety of yttrium-aluminum garnet(YAG)laser vitreolysis for vision degrading myodesopsia(VDM)caused by posterior vitreous detachment(PVD).METHODS:This retrospective study revie... AIM:To assess the long-term efficacy and safety of yttrium-aluminum garnet(YAG)laser vitreolysis for vision degrading myodesopsia(VDM)caused by posterior vitreous detachment(PVD).METHODS:This retrospective study reviewed VDM patients of PVD type undergoing YAG laser vitreolysis.The baseline demographic information,the patterns of floaters,the number of floaters,and the subjective improvement of floater sympotoms(ranging from 0 to 100%)from medical records were collected.Significant improvement was defined as a relief of floater symptoms of≥50%at the final visit.The long-term efficacy and safety of YAG laser vitreolysis were analyzed.The risk factors linked to significant improvement of floater symptoms were defined using univariate and multivariate logistic regression analyses.RESULTS:The final analysis included 221 patients with VDM.The mean age of patients was 61.08±7.74y,and the mean length of follow-up was 21.38±5.61mo.Totally 57.01%of patients experienced a significant improvement in their floater symptoms after YAG laser therapy,and none of them developed delayed retinal abnormalities such as retinal tears or detachments.Age(OR=1.049,95%CI=1.007-1.092,P=0.021)was identified as a significant risk factor for significant improvement in VDM.CONCLUSION:YAG laser vitreolysis is an effective and secure treatment for PVD-type VDM,and patients of advanced age are more likely to get favorable outcomes. 展开更多
关键词 FLOATERS posterior vitreous detachment YAG laser vitreolysis risk factors vision degrading myodesopsia
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Efficacy and Safety of Alexandrite and Nd:YAG Laser Combination in Permanent Hair Removal
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作者 Şule Gençoğlu 《International Journal of Clinical Medicine》 2023年第9期419-427,共9页
Background and Objective: Unwanted hair growth is a discomforting issue affecting both genders. People have tried various methods to get rid of this situation. This study aims to evaluate the efficacy and safety of a ... Background and Objective: Unwanted hair growth is a discomforting issue affecting both genders. People have tried various methods to get rid of this situation. This study aims to evaluate the efficacy and safety of a combined Alexandrite and Nd:YAG laser treatment for permanent hair removal, drawing insights from existing literature. Materials and Methods:This study included a total of 2127 patients (302 males, 1825 females) aged 18 - 65, with complete data, who underwent hair removal treatment between December 2018 and April 2021. These patients were treated using the Duetta laser system (Quanta system, Samarate, Italy), combining Alexandrite 755 nm and Nd:YAG 1064 nm wavelengths. The patients’ skin types were classified according to the Fitzpatrick classification scale. Target area/areas for laser hair removal was/were determined. Laser parameters, pulse counts, pain levels assessed through the Visual Pain Scale (VPS), and patient satisfaction were documented based on skin types. Findings: Across various skin types, Types I - II exhibited the highest treatment success rates (87%), with the axillary region achieving the highest rate (83%) and the face region achieving the lowest rate (75%). Pain scale analysis indicated that 98% of patients tolerated the procedure well. Patient satisfaction levels exceeded 90%. Evaluation of complication rates revealed minimal occurrences. Conclusion: The combined Alexandrite and Nd:YAG laser system demonstrates both efficacy and safety across diverse skin types, attributed to its notable success rates, minimal adverse effects, and high patient tolerance. 展开更多
关键词 laser Hair Removal Alexandrite laser Nd:YAG laser
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水平定向结晶法生长浓度渐变Yb∶YAG激光晶体及光谱性能研究
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作者 丁雨憧 张灵 +4 位作者 李海林 张月 唐杨 强铭 林辉 《人工晶体学报》 CAS 北大核心 2024年第10期1688-1698,共11页
本文采用水平定向结晶(HDC)法成功生长出180 mm×81 mm×16 mm的浓度渐变Yb∶YAG激光晶体,从放肩部位和尾部分别获取了尺寸为40 mm×40 mm×7 mm、70 mm×70 mm×7 mm的Yb∶YAG激光晶体板条各两件。采用632 nm... 本文采用水平定向结晶(HDC)法成功生长出180 mm×81 mm×16 mm的浓度渐变Yb∶YAG激光晶体,从放肩部位和尾部分别获取了尺寸为40 mm×40 mm×7 mm、70 mm×70 mm×7 mm的Yb∶YAG激光晶体板条各两件。采用632 nm激光、偏光应力仪对晶体板条的光学性质进行检测,实验结果发现靠近晶坯自由表面的板条内部通透,无散射光路,应力较小且分布均匀,表明该晶体板条具有优异的光学质量。进一步测试分析了晶体板条不同位置处的吸收光谱,根据935 nm波长处的吸收系数计算出Yb^(3+)的掺杂浓度,发现40 mm×40 mm×7 mm的激光晶体板条中Yb^(3+)掺杂浓度沿晶体生长方向逐步增加,浓度梯度约为0.42%/cm;而70 mm×70 mm×7 mm的激光晶体板条中Yb^(3+)掺杂浓度几乎保持不变,约为4.50%。 展开更多
关键词 浓度渐变 光谱性能 Yb∶YAG 水平定向结晶法 激光晶体
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芪参补气活血养颜汤联合Q开关Nd∶YAG激光治疗女性黄褐斑的美学效果观察
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作者 王姿 秦宗碧 蔡翔 《中国美容医学》 CAS 2024年第4期108-111,共4页
目的:探讨芪参补气活血养颜汤联合Q开关Nd∶YAG激光治疗女性黄褐斑的美学效果。方法:选取笔者医院2019年1月-2022年1月收治的80例黄褐斑女性作为研究对象,按照随机数字表法分为观察组42例(采用芪参补气活血养颜汤联合Q开关Nd∶YAG 1064... 目的:探讨芪参补气活血养颜汤联合Q开关Nd∶YAG激光治疗女性黄褐斑的美学效果。方法:选取笔者医院2019年1月-2022年1月收治的80例黄褐斑女性作为研究对象,按照随机数字表法分为观察组42例(采用芪参补气活血养颜汤联合Q开关Nd∶YAG 1064 nm激光治疗)和对照组38例(采用Q开关Nd∶YAG 1064 nm激光治疗)。观察两组的临床疗效,中医症状积分,皮肤状况,黄褐斑面积及颜色,不良反应发生率。结果:治疗后,观察组患者的总有效率为97.62%,高于对照组患者的84.21%(P<0.05)。治疗后,观察组患者情绪低落、胸胁胀痛、经行乳胀、口苦咽干等上述中医症状积分均低于对照组患者(P<0.05)。治疗后,观察组黑素指数、红斑指数及皱纹指数均低于对照组(P<0.05)。治疗后,观察组黄褐斑面积及颜色评分均低于对照组(P<0.05)。治疗后,观察组患者的总不良反应发生率与对照组患者比较差异无统计学意义(P>0.05)。结论:芪参补气活血养颜汤联合Q开关Nd∶YAG1064 nm激光能够提高黄褐斑治疗的临床疗效,改善患者临床症状,改善皮肤状况,减少黄褐斑面积及颜色,安全性较高,值得临床推广。 展开更多
关键词 芪参补气活血养颜汤 Q开关Nd∶YAG激光 黄褐斑 美学效果 皮肤状况
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新型Nd:YAG激光治疗中老年玻璃体混浊患者的视觉质量评价研究
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作者 宋爽 谷潇雅 +1 位作者 张鹏 喻晓兵 《中国老年保健医学》 2024年第2期23-26,共4页
目的通过新型Nd:YAG激光治疗中老年玻璃体混浊患者的视觉质量评价研究,评估新型Nd:YAG激光治疗玻璃体混浊的疗效及应用价值。方法本研究为前瞻性观察性队列研究,本研究共筛选入组47例患者54只眼,其中男性20例,女性27例,年龄30~81岁,平... 目的通过新型Nd:YAG激光治疗中老年玻璃体混浊患者的视觉质量评价研究,评估新型Nd:YAG激光治疗玻璃体混浊的疗效及应用价值。方法本研究为前瞻性观察性队列研究,本研究共筛选入组47例患者54只眼,其中男性20例,女性27例,年龄30~81岁,平均年龄(58.32±10.38)岁。所有患者术前进行最佳矫正视力(BCVA)、眼压、眼B超、超广角扫描激光眼底照相、裂隙灯散瞳眼底检查、光相干断层扫描(OCT),评估患者玻璃体混浊的位置及玻璃体后脱离情况。术后2周、4周随访,记录BCVA、眼压、眼底情况。采用配对t检验方法比较治疗前后BCVA、眼压的变化,P<0.05为差异有统计学意义的标准。结果Nd:YAG激光术前患者BCVA为0~1.0,平均为(0.18±0.27),眼压为10~20mmHg,平均为(14.84±2.22)mmHg。术后4周患者BCVA为0~1.0,平均为(0.17±0.25),眼压为9~19mmHg,平均为(14.30±2.39)mmHg。统计学分析发现,术前术后视力变化无显著性差异(P=0.129),但术后眼压轻度下降,差异有统计学意义(P=0.015)。术后4周患者视觉质量满意度评价平均分为5~10分,平均为(8.10±1.18)分。82%的患者术后3天内黑点增多,98%的患者术后2周眼前遮挡黑影消失,96%的患者术后4周视觉质量明显改善。结论经新型Nd:YAG激光治疗后的中老年玻璃体混浊患者,飞蚊症症状改善明显,患者视觉质量满意度高,尤其是伴有明显weiss环患者,患者的视觉质量改善显著。 展开更多
关键词 玻璃体混浊 飞蚊症 YAG激光 视觉质量 中老年患者
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Er∶YAG激光SWEEPS双脉冲模式激活荡洗在自由水域中的气泡动力学观测 被引量:1
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作者 何新宇 李依洲 +4 位作者 聂铭远 于悦 陈浩天 潘翀 赵继志 《实用口腔医学杂志》 CAS CSCD 北大核心 2024年第1期64-70,共7页
目的:探究Er∶YAG激光光子增强的光声流(SWEEPS)技术在不同脉冲间隔参数条件下的蒸汽气泡动力学效应。方法:Er∶YAG激光手具连接工作尖放置于自由水域模型中,设置SWEEPS模式,150~600μs脉冲间隔激活。高速摄像机(200 000 Hz)摄录Er∶YA... 目的:探究Er∶YAG激光光子增强的光声流(SWEEPS)技术在不同脉冲间隔参数条件下的蒸汽气泡动力学效应。方法:Er∶YAG激光手具连接工作尖放置于自由水域模型中,设置SWEEPS模式,150~600μs脉冲间隔激活。高速摄像机(200 000 Hz)摄录Er∶YAG激光激活荡洗引起空穴效应的过程,matlab逐帧分析蒸汽气泡间的相互作用关系,及蒸汽气泡消失时刻气泡残余与激光工作尖之间的距离。实验数据经SPSS 19.0统计软件进行统计分析。结果:在自由水域中,Er∶YAG激光SWEEPS模式下,脉冲间隔设置的改变会引起两次脉冲激发的蒸汽气泡形成不同的相互作用关系,包括双气泡融合、双气泡撞击及双气泡脱离。其中,脉冲间隔设置为360~440μs时,双气泡撞击现象会使蒸汽气泡消失时气泡残余与激光工作尖之间达到最远距离。结论:在自由水域中,Er∶YAG激光双脉冲SWEEPS模式在不同的脉冲间隔设置下引起双气泡间形成不同的作用关系,该现象可能可以增强Er∶YAG激光空穴效应,强化激光激活荡洗的临床应用效果。 展开更多
关键词 Er∶YAG激光 激光激活荡洗 气泡动力学 SWEEPS
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大功率高能脉冲激光电源设计 被引量:1
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作者 李贺龙 徐健 +5 位作者 杨之青 宋家豪 吴周宇 汤义辉 赵爽 丁立健 《强激光与粒子束》 CAS CSCD 北大核心 2024年第5期56-61,共6页
根据YAG激光器对大功率高能量脉冲电源的应用需求,设计了一种大功率脉冲激光电源,可实现高脉冲能量重复频率输出及充电电压灵活调控。前级充电网络采用串联LC谐振变换器,后级脉冲形成网络选择晶闸管触发LC放电电路。最终,研制了1台7 kW... 根据YAG激光器对大功率高能量脉冲电源的应用需求,设计了一种大功率脉冲激光电源,可实现高脉冲能量重复频率输出及充电电压灵活调控。前级充电网络采用串联LC谐振变换器,后级脉冲形成网络选择晶闸管触发LC放电电路。最终,研制了1台7 kW实验样机,最大重复频率10 Hz,最高充电电压2.2 kV,可实现单脉冲最高700 J电能输出,满足大功率高能脉冲输出的应用需求,实验测试结果验证了设计的可行性。 展开更多
关键词 YAG激光器 串联LC谐振变换器 脉冲激光电源 高脉冲能量输出
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宽温区Yb∶YAG板条激光模块热畸变仿真研究
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作者 朱铎 宋艳洁 +3 位作者 陈中正 许元斋 薄勇 彭钦军 《激光与红外》 CAS CSCD 北大核心 2024年第4期503-507,共5页
本文对不同冷却温度下的Yb:YAG晶体板条激光模块高功率运转时的温度场、应力场及对应的热畸变进行了仿真分析研究。结果显示,随着冷却温度从300 K降低至77K,板条的温度梯度热应力与应变都明显降低。当冷却温度为77 K时,最大主应力为4.14... 本文对不同冷却温度下的Yb:YAG晶体板条激光模块高功率运转时的温度场、应力场及对应的热畸变进行了仿真分析研究。结果显示,随着冷却温度从300 K降低至77K,板条的温度梯度热应力与应变都明显降低。当冷却温度为77 K时,最大主应力为4.14 MPa,仅为常温时的15.6%,最大主应变为3.82×10^(-5),仅为常温时的6%。为了分析Yb:YAG晶体板条激光模块不同冷却温度下输出激光的光束质量,以确定其最佳运转温度,我们采用光线追迹的方法,对单程通过板条的1030 nm探测光进行仿真。可以看到,当冷却温度为77 K时,远场光斑能量更为集中,且探测光光程差的PV值为0.7941μm,仅为300 K时的59.6%。模拟结果表明低温运转有利于Yb:YAG晶体板条激光模块产生高功率高光束质量激光输出,这为高功率高光束质量Yb:YAG晶体板条激光的设计工作奠定了基础。 展开更多
关键词 板条激光器 Yb∶YAG 热效应 仿真模拟
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LD环状侧面均匀泵浦Nd∶YAG激光振荡器
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作者 韩昌昊 穆宇 +4 位作者 罗辉 韩隆 方聪 王思博 魏磊 《激光与红外》 CAS CSCD 北大核心 2024年第2期179-184,共6页
激光二极管(Laser Diode,LD)环状侧面均匀泵浦的激光振荡器具有结构简单、光束质量高、单脉冲能量大等特点,常常在高能脉冲固体激光器中作为主振荡功率放大(MOPA)结构的振荡器,一直是国内外科研人员研究的重要方向之一。本论文通过Zema... 激光二极管(Laser Diode,LD)环状侧面均匀泵浦的激光振荡器具有结构简单、光束质量高、单脉冲能量大等特点,常常在高能脉冲固体激光器中作为主振荡功率放大(MOPA)结构的振荡器,一直是国内外科研人员研究的重要方向之一。本论文通过Zemax软件对不同激光二极管排列方式以及不同工作物质吸收系数对吸收光场的影响的进行了仿真。基于仿真结果,设计了一种20个bar条串联的环状侧面泵浦结构,以提高晶体吸收的均匀性。通过该环状侧泵结构,结合超高斯非稳腔设计,搭建了一种双棒串接激光振荡器进行实验研究。该振荡器实现了在100 Hz重复频率下,单脉冲能量为496 mJ、脉冲宽度为12.4 ns的1064 nm激光输出,光束质量优于9 mm·mrad,光-光转换效率为18.5%。并且该振荡器可以维持光轴稳定不变的同时,实现20 ns脉宽以内变档可调。实验结果证明了该环状侧面均匀泵浦结构可靠有效,为MOPA结构振荡器选取提供了一种有效的方案。 展开更多
关键词 激光二极管 环状侧面泵浦 Nd∶YAG 振荡器 大脉冲能量
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基于石墨烯可饱和吸收体的Er∶YAG被动调Q激光器
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作者 陈言 张沛雄 +3 位作者 权聪 孙敦陆 李真 陈振强 《人工晶体学报》 CAS 北大核心 2024年第7期1127-1135,共9页
本文研究了一种采用氙灯侧泵方式,并基于石墨烯可饱和吸收体的Er∶YAG被动调Q激光器。首先成功将石墨烯转移至Al_(2)O_(3)衬底制备得到石墨烯可饱和吸收体,并对其进行了形貌、结构及化学状态等性能表征。此外,对基于石墨烯可饱和吸收体... 本文研究了一种采用氙灯侧泵方式,并基于石墨烯可饱和吸收体的Er∶YAG被动调Q激光器。首先成功将石墨烯转移至Al_(2)O_(3)衬底制备得到石墨烯可饱和吸收体,并对其进行了形貌、结构及化学状态等性能表征。此外,对基于石墨烯可饱和吸收体的Er∶YAG被动调Q激光特性进行了研究,结果表明单脉冲能量从0.4 mJ增加至7 mJ,输出激光单脉冲宽度从761.2 ns下降至510 ns,最大峰值功率为13.7 kW。激光中心波长位于2935和2945 nm,且主波长在2935 nm处对应的半峰全宽(FWHM)为1.535 nm。沿x和y方向的光束质量因子分别为4.45和5.76。实验结果表明,该研究为推进更低成本、谐振腔设计简单且紧凑的2.94μm波段Er∶YAG激光器的发展提供了有效的参考依据。 展开更多
关键词 石墨烯可饱和吸收体 氙灯侧泵 被动调Q Er∶YAG ~3μm激光
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双波长LD泵浦Nd^(3+)∶YAG免温控被动调Q激光器的研究
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作者 吴航 窦飞飞 +4 位作者 陈南亦 徐欢天 杨炳德 司光芙 董潮涌 《激光与红外》 CAS CSCD 北大核心 2024年第5期679-684,共6页
传统的固体激光器体积、重量大,功耗高,限制了其在空间受限设备中的应用。被动调Q的LD泵浦免温控固体激光器省去了复杂的温度控制装置,调Q机构简单,能够满足复杂温度环境的特殊应用场景的小型化、低功耗要求。提出了基于双波长LD泵浦实... 传统的固体激光器体积、重量大,功耗高,限制了其在空间受限设备中的应用。被动调Q的LD泵浦免温控固体激光器省去了复杂的温度控制装置,调Q机构简单,能够满足复杂温度环境的特殊应用场景的小型化、低功耗要求。提出了基于双波长LD泵浦实现宽温度范围免温控阈值自适应的1.06μm激光脉冲输出方法。基于Nd∶YAG晶体设计了角锥棱镜谐振腔,仿真分析了LD泵浦源到激光棒的面心距对热负载的影响,并确定4 mm的最佳面心距。数值分析了相同泵浦功率下-40~60℃温度范围内激光静态能量输出变化,以及不同初始透过率的可饱和吸收体对激光阈值脉宽的影响。计算结果表明在-37℃~60℃范围内,阈值脉宽都在200μs以下,阈值脉宽最低点达到了29.4μs。构建主波实时探测的阈值自适应调节装置并搭建实验系统,实验结果表明,在温度范围为-35~60℃时,阈值脉宽变化范围为40~180μs。采用激光腔体一体加工成型,应用轻量化的铝合金材料,实现工程化应用,体积83.5 mm×44 mm×29.5 mm,重量约为230 g。在23.8%初始透过率的饱和吸收体条件下实现单脉冲输出能量42 mJ,脉冲宽度5.2 ns。 展开更多
关键词 被动调Q Nd∶YAG激光器 免温控 双波长泵浦 调Q阈值
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高能量脉冲Tm:YAG激光器研究
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作者 张奥 姚育成 +2 位作者 朱晓峰 叶君竹 王子怡 《激光杂志》 CAS 北大核心 2024年第10期33-38,共6页
报道了适合于医疗应用的高能量脉冲激光二极管(LD)泵浦Tm:YAG激光器,通过理论模拟和试验研究了脉冲Tm:YAG激光器振荡运转和输出特性,结果显示:Tm:YAG激光器在脉冲泵浦状态下产生剧烈的驰豫振荡,可输出高峰值功率子脉冲,用适当重复频率... 报道了适合于医疗应用的高能量脉冲激光二极管(LD)泵浦Tm:YAG激光器,通过理论模拟和试验研究了脉冲Tm:YAG激光器振荡运转和输出特性,结果显示:Tm:YAG激光器在脉冲泵浦状态下产生剧烈的驰豫振荡,可输出高峰值功率子脉冲,用适当重复频率泵浦时,多脉冲泵浦反转粒子的叠加效应可显著提高单脉冲输出能量,低频脉冲运转时,激光器阈值高,不利于激光器输出。实验中在重复频率120 Hz、脉宽600μs情况下,输出最大激光能量476 mJ,光光效率26.4%;在泵浦平均功率300 W时,得到68.2 W的平均功率输出,光光效率22.7%。此高能量脉冲2μm激光输出实验,为激光医疗应用提供参考。 展开更多
关键词 Tm:YAG激光器 脉冲激光二极管 脉冲能量 驰豫振荡 子脉冲
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基于零声子线泵浦的高效率Yb∶YAG薄片激光器
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作者 高瑜博 徐思志 +9 位作者 陈业旺 刘敏秋 欧阳德钦 吴旭 陈俊展 赵俊清 郭春雨 刘星 吕启涛 阮双琛 《光子学报》 EI CAS CSCD 北大核心 2024年第2期171-179,共9页
高功率激光器在工业应用领域的需求不断增长,提高光-光转化效率是降低其生产制造成本的关键途径。针对提高激光器光-光转化效率所面临的增益介质的热负荷问题,利用锁定波长的969 nm“零声子线”泵浦、自主研制的高性能Yb∶YAG薄片晶体... 高功率激光器在工业应用领域的需求不断增长,提高光-光转化效率是降低其生产制造成本的关键途径。针对提高激光器光-光转化效率所面临的增益介质的热负荷问题,利用锁定波长的969 nm“零声子线”泵浦、自主研制的高性能Yb∶YAG薄片晶体和48冲程泵浦系统等,搭建了高效的连续Yb∶YAG薄片激光器系统,实现了最高输出功率373 W,光-光转化效率可达73.37%。其优异性能为后续开展千瓦级超快Yb∶YAG薄片激光器研究奠定了基础。 展开更多
关键词 薄片激光器 多冲程泵浦 Yb∶YAG 高效率
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YAG激光联合渗透树脂辅助诊室漂白治疗氟斑牙的临床疗效和舒适度分析
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作者 苑学微 李娜 牛家慧 《河北医药》 CAS 2024年第14期2131-2134,2139,共5页
目的 探讨在诊疗室应用YAG激光配合渗透性树脂漂白对氟斑牙的疗效。方法 选取2020-2022年石家庄市第二医院口腔科诊治的氟斑牙患者90例,按照随机数字表法分为A、B组,每组45例。A组采用低能量(YAG)激光处理,同时加以诊室漂白,B组采用低能... 目的 探讨在诊疗室应用YAG激光配合渗透性树脂漂白对氟斑牙的疗效。方法 选取2020-2022年石家庄市第二医院口腔科诊治的氟斑牙患者90例,按照随机数字表法分为A、B组,每组45例。A组采用低能量(YAG)激光处理,同时加以诊室漂白,B组采用低能量(YAG)激光处理,并与渗透树脂辅助诊室漂白相联合,用VITA比色板作脱色前后对比,以分光比色仪记录美白后釉质表面的色阶和色度。使用分光光度计和Vita指南记录每个时间节点的牙齿颜色变化,2年的随访中,评估牙齿美白前后的颜色反色效应。比较2组患者治疗后的牙齿敏感发生率。结果 治疗后2组患者牙齿颜色均变白,但B组患者牙齿颜色等级显著低于A组,差异有统计学意义(P<0.001)。1周美白治疗后,A、B组患者的漂白总有效率分别为75.56%、73.33%,差异无统计学意义(P>0.05);6个月后,B组和A组的漂白总有效率分别为80.00%和75.56%,差异无统计学意义(P>0.05);1年后,B组和A组的漂白总有效率分别为100%和80.00%,差异有统计学意义(P<0.05);2年后,B组总有效率为100%,A组为82.22%,差异有统计学意义(P<0.05)。治疗后立即牙敏感率B组为40.00%明显小于A组的93.33%(P<0.05);2组在用药24 h内均未出现过敏反应。结论 YAG激光联合渗透树脂辅助诊室漂白治疗中度氟斑牙在临床上具有相对更好的疗效和舒适度。 展开更多
关键词 YAG激光 渗透树脂 诊室漂白 氟斑牙治疗
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低通量Q开关Nd∶YAG激光联合微针导入氨甲环酸治疗黄褐斑
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作者 陈文文 简杏玲 +1 位作者 王洁仪 于波 《福建医科大学学报》 2024年第2期122-128,共7页
目的评估低通量Q开关Nd∶YAG(QSNY)激光单一治疗与其联合微针导入氨甲环酸治疗黄褐斑的疗效差别,并基于皮肤镜分型分析不同类型黄褐斑的最佳治疗方式。方法收集2022年1月—2023年12月就诊的黄褐斑患者的临床资料,比较QSNY激光单一治疗组... 目的评估低通量Q开关Nd∶YAG(QSNY)激光单一治疗与其联合微针导入氨甲环酸治疗黄褐斑的疗效差别,并基于皮肤镜分型分析不同类型黄褐斑的最佳治疗方式。方法收集2022年1月—2023年12月就诊的黄褐斑患者的临床资料,比较QSNY激光单一治疗组(对照组,23例)与QSNY激光联合微针导入氨甲环酸治疗组(联合组,23例)治疗3次后改良黄褐斑面积和严重程度指数(mMASI)评分、皮肤镜检查总评分(TDS)、医生临床评估(PGA)和不良反应的发生率。结果2组患者治疗后mMASI评分均降低,联合组的mMASI评分改善优于对照组(P<0.05);2组患者治疗后TDS均降低,联合组改善程度更佳,差别有统计学意义(P<0.05)。与治疗前比较,联合组治疗后毛细血管扩张明显改善,差别有统计学意义(P<0.001)。2组患者的PGA评分比较,差别无统计学意义(P>0.05)。2组患者治疗后均未发现明显的不良反应。结论QSNY激光联合微针导入氨甲环酸治疗黄褐斑的疗效优于单一激光治疗,前者对血管增生和表皮色素沉着明显的黄褐斑更有利。 展开更多
关键词 黄褐斑 Q开关Nd∶YAG激光 微针 氨甲环酸 联合治疗
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Nd∶YAG和Er∶YAG激光联合辅助治疗伴2型糖尿病的慢性牙周炎的临床疗效分析
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作者 朱晓茹 逄键梁 +2 位作者 刘冰 吴莹莹 常晓燕 《实用口腔医学杂志》 CAS CSCD 北大核心 2024年第3期430-433,共4页
纳入合并2型糖尿病的慢性牙周炎患者30例,采用分口设计法,将同患者左侧牙列设为试验组,行牙周基础治疗,以及Nd∶YAG和Er∶YAG激光联合辅助治疗,右侧牙列设为对照组,仅行牙周基础治疗。治疗前后检测牙周及CBCT影像指标,并行组间比较。治... 纳入合并2型糖尿病的慢性牙周炎患者30例,采用分口设计法,将同患者左侧牙列设为试验组,行牙周基础治疗,以及Nd∶YAG和Er∶YAG激光联合辅助治疗,右侧牙列设为对照组,仅行牙周基础治疗。治疗前后检测牙周及CBCT影像指标,并行组间比较。治疗前2组全部指标无统计学差异(P>0.05)。治疗后3个月,试验组的出血指数(BI)和探诊深度(PD)明显低于对照组(P<0.05);治疗后6个月,试验组的BI、PD以及附着丧失(AL)明显低于对照组,牙槽骨内剩余牙根表面积和牙根体积明显高于对照组(P<0.05)。Nd∶YAG和Er∶YAG激光联合辅助下的牙周基础治疗较单纯牙周基础治疗对伴2型糖尿病的慢性牙周炎疗效更为显著。 展开更多
关键词 Nd∶YAG激光 Er∶YAG激光 2型糖尿病 慢性牙周炎
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NUMERICAL SIMULATION OF DIODE-PUMPED DOUBLE-CLAD Tm-Ho DOPED FLUORIDE LASERS
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作者 王家新 庞冬青 +2 位作者 张宇生 AhmadM KingTA 《Transactions of Tianjin University》 EI CAS 1997年第2期3-8,共6页
Numerical simulation is described which estimates the performance of thulium sensitized holmium doped CW fluoride fiber laser at 2.04 μm for both core and cladding pumped. This model takes into account the mechanis... Numerical simulation is described which estimates the performance of thulium sensitized holmium doped CW fluoride fiber laser at 2.04 μm for both core and cladding pumped. This model takes into account the mechanisms of cross relaxation and energy transfer to describe the laser operation. A subroutine program for calculating the absorption rate of cladding pumped scheme is included in the model. The losses of signal and pump light along the fiber have been taken into account. The test of cladding pumped scheme program shows good agreement with the experimental result. The experimental results of core pumping Tm Ho doped fiber laser in fluoride host are compared with the present model, and shows a good agreement with calculations. This model also provides data of the optimum parameters for the configuration of the efficient cladding pumped Tm Ho fluoride laser systems. 展开更多
关键词 numerical simulation cladding pumped Tm Ho co doped fiber laser
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