摘要
The quantum cascade laser(QCL),a potential laser source for mid-infrared applications,has all of the advantages of a semiconductor laser,such as small volume and light weight,and is driven by electric power.However,the optical power of a single QCL is limited by serious self-heating efects.Therefore,beam combination technology is essential to achieve higher laser powers.In this letter,we demonstrate a simple beam combination scheme using two QCLs to extend the output peak power of the lasers to 2.3 W.A high beam combination efciency of 89% and beam quality factor of less than 5 are also achieved.
The quantum cascade laser(QCL),a potential laser source for mid-infrared applications,has all of the advantages of a semiconductor laser,such as small volume and light weight,and is driven by electric power.However,the optical power of a single QCL is limited by serious self-heating efects.Therefore,beam combination technology is essential to achieve higher laser powers.In this letter,we demonstrate a simple beam combination scheme using two QCLs to extend the output peak power of the lasers to 2.3 W.A high beam combination efciency of 89% and beam quality factor of less than 5 are also achieved.
基金
supported by the National Natural Science Foundation of China(Nos.61076064 and 61176046)
the International Science Technology Cooperation Program of China(No.2013DFR00730)
the Hundred Talents Program of Chinese Academy of Sciences for their fnancial support
