外文题目: Narrow-spectral-span spectral beam combining with a nonparallel double-grating structure
作者: Zhou, Quan; Zhou, Changhe; Yu, Na; Wei, Chunlong; Jia, Wei; Lu, Yancong
刊名: Chin. Opt. Lett.
年: 2017 卷: 15 期: 9 文章编号：91403
英文关键词:

DIODE-LASER ARRAY; EXTERNAL-CAVITY; HIGH-EFFICIENCY; WAVELENGTH
英文摘要:
We propose a nonparallel double-grating structure in a spectral-beam combining technique, where two gratings are placed nonparallel satisfying the Littrow mount in the focal region of the convergent lens. The most attractive advantage of this approach is that it will compress the spectral span into half of its original spectrum, which means the number of combined elements can be doubled in the gain range of diode lasers. Experimental results demonstrate that the CW output power of the combined beam is 30.9 W with a spectral span of 7.0 nm, compared with its original spectrum span of 13.6 nm, and the spectral beam combining efficiency is 70.5%. In consideration that a single grating could have a high efficiency of > 97% in a bandwidth of over ten nanometers, the efficiency loss of the grating pair should be less than 6%, which is acceptable for most applications, so this method of using double gratings should be highly interesting for practical applications when a nearly doubled number of diode lasers could be combined into one single laser compared with the previous single-grating methods.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.3788/COL201715.091403


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