高功率,红光至中红外可调谐腔内和频光学参量振荡器  

High power red to mid-infrared laser source from intracavity sum frequency optical parametric oscillator pumped by femtosecond fiber laser

作　　者：张丽梦[1] 胡明列[1] 顾澄琳[1] 范锦涛 王清月[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院超快激光研究室,光电信息技术教育部重点实验室,天津300072

出　　处：《物理学报》2014年第5期166-170,共5页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2011CB808101;2010CB327604);国家自然科学基金(批准号:61322502;61205131;11274239)资助的课题~~

摘　　要：本文利用高重复频率,高平均功率大模场面积飞秒光纤激光器作为同步抽运源,抽运以多周期极化掺氧化镁铌酸锂为非线性晶体的单共振光学参量振荡器,获得了高功率可调谐红光至中红外光,信号光调谐范围为1450—2200 nm,闲频光调谐范围为2250—4000 nm,在2 W的抽运功率下,信号光输出波长为1502 nm时获得最大输出功率374 mW,转换效率为18.7%,脉冲宽度为144 fs,此时中红外输出中心波长为3.4μm,平均功率为166 mW.再利用BBO晶体对信号光进行腔内和频,获得和频光输出波长调谐范围为610—668 nm,在4.1 W抽运的情况下,最高平均功率为615 nm处的694 mW,转换效率达16.9%.A femtosecond laser source tuned from red to mid-infrared is demonstrated. It is based on intracavity sum frequency generation of a MgO-doped periodically poled LiNbO3optical parametric oscillator synchronously pumped by modelocked Yb large-mode-area photonic crystal fiber, which has high average power and high repetition rate. The optical parametric oscillator has a wide spectral tuning range from 1450—2200 nm（for the signal） and 2250—4000 nm（for the idler） while the wavelength of the pump is 1040 nm. In the experiment, the output power of 374 mW at 1502 nm is achieved when the pump power is 2 W and the slope eficiency is 18.7%. In addition, 166 mW idler at 3.4 μm are achieved. By using a β-BaB2O4for intracavity sum frequency generation, the femtosecond pulse over 610—668 nm is obtained. A 694 mW average output power of sum frequency generation is achieved for 4.1 W pump, representing 16.9%conversion eficiency at 615 nm.

关 键 词：光学参量振荡器 光纤激光器 中红外 腔内和频 

分 类 号：TN753.91[电子电信—电路与系统]